TY  - JOUR
AU  - Petković, Branka B.
AU  - Milčić, Miloš
AU  - Stanković, Dalibor
AU  - Stambolic, I.
AU  - Manojlović, Dragan
AU  - Jovanović, Vladislava M.
AU  - Sovilj, Sofija P.
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1288
AB  - The complexation reactions between octaazamacrocyclic ligand N,N',N '',N'"-tetrakis(2-pyridylmethyl)-1,4,8,11-tetraazacyclotetradecane (tpmc) and Co2+, Ni2+, Zn2+ and Cu2+ metal cations have been studied conductometrically in acetonitrile and aqueous solutions. The conductance data exhibit different stoichiometry of the complexes in two studied solutions. In most cases 1:1 (ML) complexes were formed while in some cases 2:1 (M2L) complexes are evident. The stability constants of the resulting 1:1 complexes were determined by computer fitting of the conductance/mole ratio data. Theoretical DFT calculations were used to explain metal binding capability of tpmc ligand and the binding sequences were found to follow the order: Cu2+ >> Ni2+ > Co2+ > Zn2+. The combination of results obtained by this theoretical approach and conductometric study successfully explains sensitivity and selectivity of recently developed tpmc based ISE and could play a guiding role in planning experiments with large macrocyclic ligands.
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - Electrochimica Acta
T1  - Complexation ability of octaazamacrocyclic ligand toward Co2+, Ni2+, Cu2+ and Zn2+ metal cations: Experimental and theoretical study
VL  - 89
SP  - 680
EP  - 687
DO  - 10.1016/j.electacta.2012.11.100
ER  - 

@article{
author = "Petković, Branka B. and Milčić, Miloš and Stanković, Dalibor and Stambolic, I. and Manojlović, Dragan and Jovanović, Vladislava M. and Sovilj, Sofija P.",
year = "2013",
abstract = "The complexation reactions between octaazamacrocyclic ligand N,N',N '',N'"-tetrakis(2-pyridylmethyl)-1,4,8,11-tetraazacyclotetradecane (tpmc) and Co2+, Ni2+, Zn2+ and Cu2+ metal cations have been studied conductometrically in acetonitrile and aqueous solutions. The conductance data exhibit different stoichiometry of the complexes in two studied solutions. In most cases 1:1 (ML) complexes were formed while in some cases 2:1 (M2L) complexes are evident. The stability constants of the resulting 1:1 complexes were determined by computer fitting of the conductance/mole ratio data. Theoretical DFT calculations were used to explain metal binding capability of tpmc ligand and the binding sequences were found to follow the order: Cu2+ >> Ni2+ > Co2+ > Zn2+. The combination of results obtained by this theoretical approach and conductometric study successfully explains sensitivity and selectivity of recently developed tpmc based ISE and could play a guiding role in planning experiments with large macrocyclic ligands.",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "Electrochimica Acta",
title = "Complexation ability of octaazamacrocyclic ligand toward Co2+, Ni2+, Cu2+ and Zn2+ metal cations: Experimental and theoretical study",
volume = "89",
pages = "680-687",
doi = "10.1016/j.electacta.2012.11.100"
}

Petković, B. B., Milčić, M., Stanković, D., Stambolic, I., Manojlović, D., Jovanović, V. M.,& Sovilj, S. P.. (2013). Complexation ability of octaazamacrocyclic ligand toward Co2+, Ni2+, Cu2+ and Zn2+ metal cations: Experimental and theoretical study. in Electrochimica Acta
Oxford : Pergamon-Elsevier Science Ltd., 89, 680-687.
https://doi.org/10.1016/j.electacta.2012.11.100

Petković BB, Milčić M, Stanković D, Stambolic I, Manojlović D, Jovanović VM, Sovilj SP. Complexation ability of octaazamacrocyclic ligand toward Co2+, Ni2+, Cu2+ and Zn2+ metal cations: Experimental and theoretical study. in Electrochimica Acta. 2013;89:680-687.
doi:10.1016/j.electacta.2012.11.100 .

Petković, Branka B., Milčić, Miloš, Stanković, Dalibor, Stambolic, I., Manojlović, Dragan, Jovanović, Vladislava M., Sovilj, Sofija P., "Complexation ability of octaazamacrocyclic ligand toward Co2+, Ni2+, Cu2+ and Zn2+ metal cations: Experimental and theoretical study" in Electrochimica Acta, 89 (2013):680-687,
https://doi.org/10.1016/j.electacta.2012.11.100 . .

TY  - JOUR
AU  - Sovilj, Sofija P.
AU  - Mitić, Dragana
AU  - Drakulić, Branko
AU  - Milenković, Marina
PY  - 2012
UR  - http://farfar.pharmacy.bg.ac.rs/handle/123456789/1819
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1247
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3646
AB  - Five new dioxomolybdenum(VI) complexes of the general formula [MoO2(Rdtc)2], 1-5, where Rdtc- refer to piperidine (Pipdtc), 4-morpholine (Morphdtc), 4-thiomorpholine (Timdtc), piperazine (Pzdtc) or N-methylpiperazine (N-Mepzdtc) dithiocarbamates, respectively, have been prepared. The complexes were characterized by elemental analysis, conductometric measurements, electronic, IR and NMR spectroscopy. The complexes 1-5 contain a cis-MoO2 group and have an octahedral geometry. Two dithiocarbamato ions join as bidentates with both the sulfur atoms to the molybdenum atom. The presence of different heteroatoms in the piperidino moiety influences the v(C=N) and v(C=S) vibrations, which wavelengths decrease in the order: Pipdtc > N-Mepzdtc > Morphdtc > Pzdtc > Timdtc ligands. Based on their spectral data, the molecular structures of complexes 1-5 were optimized at the semi-empirical molecular-orbital level, and the geometries, as obtained from calculations, are described. The antimicrobial activities of the complexes were tested against nine different laboratory control strains of bacteria and two strains of the yeast Candida albicans. All the tested strains were sensitive. Complexes bearing heteroatom in position 4 of piperidine moiety were significantly more potent against the tested bacteria compared to the corresponding ligands.
AB  - Sintetisano je pet novih dioksomolibden(VI) kompleksa, opšte formule [MoO2(Rdtc-)2], sa Rdtc- ligandima: piperidin- (Pipdtc), 4-morfolin- (Morphdtc), 4-tiomorfolin- (Timdtc), piperazin- (Pzdtc) i N-metilpiperazin- (N-Mepzdtc) ditiokarbamatima. Kompleksi su okarakterisani elementalnom analizom, IR i NMR spektroskopijom kao i merenjem molarne provodljivosti. Pretpostavljena geometrija svih kompleksa je oktaedarska. Rdtc- ligandi su bidentatno koordinovani preko oba atoma sumpora za atom molibdena. Prisustvo različitih heteroatoma utiče na promenu položaja v(C=N) i v(C=S) vibracija, čiji opada sledećim redom liganada: Pipdtc > N-Mepzdtc > Morphdt > Pzdtc > Timdtc. Na osnovu spektralnih podataka, strukture svih kompleksa su optimizovane na semiempirijskom molekulsko-orbitalnom nivou upotrebom PM6 metoda. Antimikrobna aktivnost ispitivana je na jedanaest različitih patogena. Uočeno je da kompleksi koji imaju heteroatom u položaju 4 piperidinskog prstena ispoljavaju značajno veću jačinu antimikrobnog dejstva prema bakterijama, u poređenju sa odgovarajućim ligandima.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Spectroscopic properties and antimicrobial activity of dioxomolybdenum(VI) complexes with heterocyclic S,S'-ligands
T1  - Spektroskopska svojstva i antimikrobna aktivnost dioksomolibden(VI) kompleksa sa heterocikličnim S,S'-ligandima
VL  - 77
IS  - 1
SP  - 53
EP  - 66
DO  - 10.2298/JSC110328160S
ER  - 

@article{
author = "Sovilj, Sofija P. and Mitić, Dragana and Drakulić, Branko and Milenković, Marina",
year = "2012",
abstract = "Five new dioxomolybdenum(VI) complexes of the general formula [MoO2(Rdtc)2], 1-5, where Rdtc- refer to piperidine (Pipdtc), 4-morpholine (Morphdtc), 4-thiomorpholine (Timdtc), piperazine (Pzdtc) or N-methylpiperazine (N-Mepzdtc) dithiocarbamates, respectively, have been prepared. The complexes were characterized by elemental analysis, conductometric measurements, electronic, IR and NMR spectroscopy. The complexes 1-5 contain a cis-MoO2 group and have an octahedral geometry. Two dithiocarbamato ions join as bidentates with both the sulfur atoms to the molybdenum atom. The presence of different heteroatoms in the piperidino moiety influences the v(C=N) and v(C=S) vibrations, which wavelengths decrease in the order: Pipdtc > N-Mepzdtc > Morphdtc > Pzdtc > Timdtc ligands. Based on their spectral data, the molecular structures of complexes 1-5 were optimized at the semi-empirical molecular-orbital level, and the geometries, as obtained from calculations, are described. The antimicrobial activities of the complexes were tested against nine different laboratory control strains of bacteria and two strains of the yeast Candida albicans. All the tested strains were sensitive. Complexes bearing heteroatom in position 4 of piperidine moiety were significantly more potent against the tested bacteria compared to the corresponding ligands., Sintetisano je pet novih dioksomolibden(VI) kompleksa, opšte formule [MoO2(Rdtc-)2], sa Rdtc- ligandima: piperidin- (Pipdtc), 4-morfolin- (Morphdtc), 4-tiomorfolin- (Timdtc), piperazin- (Pzdtc) i N-metilpiperazin- (N-Mepzdtc) ditiokarbamatima. Kompleksi su okarakterisani elementalnom analizom, IR i NMR spektroskopijom kao i merenjem molarne provodljivosti. Pretpostavljena geometrija svih kompleksa je oktaedarska. Rdtc- ligandi su bidentatno koordinovani preko oba atoma sumpora za atom molibdena. Prisustvo različitih heteroatoma utiče na promenu položaja v(C=N) i v(C=S) vibracija, čiji opada sledećim redom liganada: Pipdtc > N-Mepzdtc > Morphdt > Pzdtc > Timdtc. Na osnovu spektralnih podataka, strukture svih kompleksa su optimizovane na semiempirijskom molekulsko-orbitalnom nivou upotrebom PM6 metoda. Antimikrobna aktivnost ispitivana je na jedanaest različitih patogena. Uočeno je da kompleksi koji imaju heteroatom u položaju 4 piperidinskog prstena ispoljavaju značajno veću jačinu antimikrobnog dejstva prema bakterijama, u poređenju sa odgovarajućim ligandima.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Spectroscopic properties and antimicrobial activity of dioxomolybdenum(VI) complexes with heterocyclic S,S'-ligands, Spektroskopska svojstva i antimikrobna aktivnost dioksomolibden(VI) kompleksa sa heterocikličnim S,S'-ligandima",
volume = "77",
number = "1",
pages = "53-66",
doi = "10.2298/JSC110328160S"
}

Sovilj, S. P., Mitić, D., Drakulić, B.,& Milenković, M.. (2012). Spectroscopic properties and antimicrobial activity of dioxomolybdenum(VI) complexes with heterocyclic S,S'-ligands. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 77(1), 53-66.
https://doi.org/10.2298/JSC110328160S

Sovilj SP, Mitić D, Drakulić B, Milenković M. Spectroscopic properties and antimicrobial activity of dioxomolybdenum(VI) complexes with heterocyclic S,S'-ligands. in Journal of the Serbian Chemical Society. 2012;77(1):53-66.
doi:10.2298/JSC110328160S .

Sovilj, Sofija P., Mitić, Dragana, Drakulić, Branko, Milenković, Marina, "Spectroscopic properties and antimicrobial activity of dioxomolybdenum(VI) complexes with heterocyclic S,S'-ligands" in Journal of the Serbian Chemical Society, 77, no. 1 (2012):53-66,
https://doi.org/10.2298/JSC110328160S . .

TY  - JOUR
AU  - Petković, Branka B.
AU  - Stevanović, Sanja
AU  - Budimir, Milana V.
AU  - Sovilj, Sofija P.
AU  - Jovanović, Vladislava M.
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/973
AB  - Mixed ligand dinuclear copper(II) complexes of the general formula [Cu2(Rdtc)tpmc)](ClO4)3 with octaazamacrocyclic ligand tpmc and four different heterocyclic dithiocarbamate ligands Rdtc-, as well as the complexes [Cu2(tpmc)](ClO4)4 and [Cu(tpmc)](ClO4)2 center dot 2H2O were studied in aqueous NaClO4 and HClO4 solutions by cyclic voltammetry on glassy carbon electrode. The electrochemical properties of the ligands and Cu(II) complexes were correlated with their electronic structure. Conductometric experiments showed different stoichiometry in complexation of tpmc with Cu2+ ions and transport of ions in acetonitrile and in aqueous media. These studies clarified the application of this macrocyclic ligand as ionophore in a PVC membrane copper(II) selective electrode and contributed elucidation of its sensor properties.
PB  - Wiley-Blackwell, Malden
T2  - Electroanalysis
T1  - Electrochemical Examination of Copper(II) Complexes with Octaazamacrocyclic Ligand and Heterocyclic Dithiocarbamate
VL  - 24
IS  - 7
SP  - 1605
EP  - 1612
DO  - 10.1002/elan.201200120
ER  - 

@article{
author = "Petković, Branka B. and Stevanović, Sanja and Budimir, Milana V. and Sovilj, Sofija P. and Jovanović, Vladislava M.",
year = "2012",
abstract = "Mixed ligand dinuclear copper(II) complexes of the general formula [Cu2(Rdtc)tpmc)](ClO4)3 with octaazamacrocyclic ligand tpmc and four different heterocyclic dithiocarbamate ligands Rdtc-, as well as the complexes [Cu2(tpmc)](ClO4)4 and [Cu(tpmc)](ClO4)2 center dot 2H2O were studied in aqueous NaClO4 and HClO4 solutions by cyclic voltammetry on glassy carbon electrode. The electrochemical properties of the ligands and Cu(II) complexes were correlated with their electronic structure. Conductometric experiments showed different stoichiometry in complexation of tpmc with Cu2+ ions and transport of ions in acetonitrile and in aqueous media. These studies clarified the application of this macrocyclic ligand as ionophore in a PVC membrane copper(II) selective electrode and contributed elucidation of its sensor properties.",
publisher = "Wiley-Blackwell, Malden",
journal = "Electroanalysis",
title = "Electrochemical Examination of Copper(II) Complexes with Octaazamacrocyclic Ligand and Heterocyclic Dithiocarbamate",
volume = "24",
number = "7",
pages = "1605-1612",
doi = "10.1002/elan.201200120"
}

Petković, B. B., Stevanović, S., Budimir, M. V., Sovilj, S. P.,& Jovanović, V. M.. (2012). Electrochemical Examination of Copper(II) Complexes with Octaazamacrocyclic Ligand and Heterocyclic Dithiocarbamate. in Electroanalysis
Wiley-Blackwell, Malden., 24(7), 1605-1612.
https://doi.org/10.1002/elan.201200120

Petković BB, Stevanović S, Budimir MV, Sovilj SP, Jovanović VM. Electrochemical Examination of Copper(II) Complexes with Octaazamacrocyclic Ligand and Heterocyclic Dithiocarbamate. in Electroanalysis. 2012;24(7):1605-1612.
doi:10.1002/elan.201200120 .

Petković, Branka B., Stevanović, Sanja, Budimir, Milana V., Sovilj, Sofija P., Jovanović, Vladislava M., "Electrochemical Examination of Copper(II) Complexes with Octaazamacrocyclic Ligand and Heterocyclic Dithiocarbamate" in Electroanalysis, 24, no. 7 (2012):1605-1612,
https://doi.org/10.1002/elan.201200120 . .

TY  - JOUR
AU  - Sejmanović, Dragana M.
AU  - Petković, Branka B.
AU  - Budimir, Milana V.
AU  - Sovilj, Sofija P.
AU  - Jovanović, Vladislava M.
PY  - 2011
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/764
AB  - An all solid-state Ag(I) ion-selective electrode has been prepared by simply immersing a glassy carbon rod coated with PVCAc, which contained plasticizer and additive but no ionophore, into the AgNO3 solution. The response of the electrode was linear with a Nernstian slope of 60.25 mV/decade within the concentration range from 1 x 10(-1) to 1 x 10(-5) M and with a detection limit of 4.25 x 10(-6)M. The stability as an effect of various cations was defined. The electrode is suitable for use in high acidic solutions (pH  LT 1 to 7) and has successfully been applied for the determination of silver(I) concentrations in different samples.
PB  - Wiley-Blackwell, Malden
T2  - Electroanalysis
T1  - Characterization of a Silver Modified PVCAc Electrode and Its Application as a Ag(I)-Selective Potentiometric Sensor
VL  - 23
IS  - 8
SP  - 1849
EP  - 1855
DO  - 10.1002/elan.201000745
ER  - 

@article{
author = "Sejmanović, Dragana M. and Petković, Branka B. and Budimir, Milana V. and Sovilj, Sofija P. and Jovanović, Vladislava M.",
year = "2011",
abstract = "An all solid-state Ag(I) ion-selective electrode has been prepared by simply immersing a glassy carbon rod coated with PVCAc, which contained plasticizer and additive but no ionophore, into the AgNO3 solution. The response of the electrode was linear with a Nernstian slope of 60.25 mV/decade within the concentration range from 1 x 10(-1) to 1 x 10(-5) M and with a detection limit of 4.25 x 10(-6)M. The stability as an effect of various cations was defined. The electrode is suitable for use in high acidic solutions (pH  LT 1 to 7) and has successfully been applied for the determination of silver(I) concentrations in different samples.",
publisher = "Wiley-Blackwell, Malden",
journal = "Electroanalysis",
title = "Characterization of a Silver Modified PVCAc Electrode and Its Application as a Ag(I)-Selective Potentiometric Sensor",
volume = "23",
number = "8",
pages = "1849-1855",
doi = "10.1002/elan.201000745"
}

Sejmanović, D. M., Petković, B. B., Budimir, M. V., Sovilj, S. P.,& Jovanović, V. M.. (2011). Characterization of a Silver Modified PVCAc Electrode and Its Application as a Ag(I)-Selective Potentiometric Sensor. in Electroanalysis
Wiley-Blackwell, Malden., 23(8), 1849-1855.
https://doi.org/10.1002/elan.201000745

Sejmanović DM, Petković BB, Budimir MV, Sovilj SP, Jovanović VM. Characterization of a Silver Modified PVCAc Electrode and Its Application as a Ag(I)-Selective Potentiometric Sensor. in Electroanalysis. 2011;23(8):1849-1855.
doi:10.1002/elan.201000745 .

Sejmanović, Dragana M., Petković, Branka B., Budimir, Milana V., Sovilj, Sofija P., Jovanović, Vladislava M., "Characterization of a Silver Modified PVCAc Electrode and Its Application as a Ag(I)-Selective Potentiometric Sensor" in Electroanalysis, 23, no. 8 (2011):1849-1855,
https://doi.org/10.1002/elan.201000745 . .

TY  - JOUR
AU  - Petković, Branka B.
AU  - Sovilj, Sofija P.
AU  - Budimir, Milana V.
AU  - Simonović, Ranko M.
AU  - Jovanović, Vladislava M.
PY  - 2010
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/695
AB  - The simple PVC-based membrane containing N',N',N '',N '''-tetrakis(2-pyridylmethyl)-1,4,8,11-tetraazacyclotetradecane (tpmc) as an ionophore and dibutyl phthalate as a plasticizer, directly coated on a glassy carbon electrode was examined as a new sensor for Cu2+ ions. The potential response was linear within the concentration range of 1.0x10(-1)-1.0 x 10(-6)M with a Nernstian slope of 28.8 mV/decade and detection limit of 7.0 x 10(-7)M. The electrode was used in aqueous solutions over a wide pH range (1.3-6). The sensor exhibited excellent selectivity for Cu2+ ion over a number of cations and was successfully used in its determination in real samples.
PB  - Wiley-Blackwell, Malden
T2  - Electroanalysis
T1  - A Copper(II) Ion-Selective Potentiometric Sensor Based on N ',N ',N '',N '''-Tetrakis(2-pyridylmethyl)-1,4,8,11-tetraazacyclotetradecane in PVC Matrix
VL  - 22
IS  - 16
SP  - 1894
EP  - 1900
DO  - 10.1002/elan.201000053
ER  - 

@article{
author = "Petković, Branka B. and Sovilj, Sofija P. and Budimir, Milana V. and Simonović, Ranko M. and Jovanović, Vladislava M.",
year = "2010",
abstract = "The simple PVC-based membrane containing N',N',N '',N '''-tetrakis(2-pyridylmethyl)-1,4,8,11-tetraazacyclotetradecane (tpmc) as an ionophore and dibutyl phthalate as a plasticizer, directly coated on a glassy carbon electrode was examined as a new sensor for Cu2+ ions. The potential response was linear within the concentration range of 1.0x10(-1)-1.0 x 10(-6)M with a Nernstian slope of 28.8 mV/decade and detection limit of 7.0 x 10(-7)M. The electrode was used in aqueous solutions over a wide pH range (1.3-6). The sensor exhibited excellent selectivity for Cu2+ ion over a number of cations and was successfully used in its determination in real samples.",
publisher = "Wiley-Blackwell, Malden",
journal = "Electroanalysis",
title = "A Copper(II) Ion-Selective Potentiometric Sensor Based on N ',N ',N '',N '''-Tetrakis(2-pyridylmethyl)-1,4,8,11-tetraazacyclotetradecane in PVC Matrix",
volume = "22",
number = "16",
pages = "1894-1900",
doi = "10.1002/elan.201000053"
}

Petković, B. B., Sovilj, S. P., Budimir, M. V., Simonović, R. M.,& Jovanović, V. M.. (2010). A Copper(II) Ion-Selective Potentiometric Sensor Based on N ',N ',N '',N '''-Tetrakis(2-pyridylmethyl)-1,4,8,11-tetraazacyclotetradecane in PVC Matrix. in Electroanalysis
Wiley-Blackwell, Malden., 22(16), 1894-1900.
https://doi.org/10.1002/elan.201000053

Petković BB, Sovilj SP, Budimir MV, Simonović RM, Jovanović VM. A Copper(II) Ion-Selective Potentiometric Sensor Based on N ',N ',N '',N '''-Tetrakis(2-pyridylmethyl)-1,4,8,11-tetraazacyclotetradecane in PVC Matrix. in Electroanalysis. 2010;22(16):1894-1900.
doi:10.1002/elan.201000053 .

Petković, Branka B., Sovilj, Sofija P., Budimir, Milana V., Simonović, Ranko M., Jovanović, Vladislava M., "A Copper(II) Ion-Selective Potentiometric Sensor Based on N ',N ',N '',N '''-Tetrakis(2-pyridylmethyl)-1,4,8,11-tetraazacyclotetradecane in PVC Matrix" in Electroanalysis, 22, no. 16 (2010):1894-1900,
https://doi.org/10.1002/elan.201000053 . .

TY  - JOUR
AU  - Stevanović, Sanja
AU  - Babić-Samardžija, Ksenija
AU  - Sovilj, Sofija P.
AU  - Tripković, Amalija
AU  - Jovanović, Vladislava M.
PY  - 2009
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/553
AB  - Platinum electrode decorated with three different mixed-ligand cobalt(III) complexes of the general formula [Co(Rdtc)cyclam](ClO4)(2) [cyclam = 1,4,8,11-tetraazacyclotetradecane, Rdtc(-) = morpholine-(Morphdtc), piperidine-(Pipdtc), and 4-methylpiperidine-(4-Mepipdtc) dithiocarbamates, respectively] was used to study oxidation of formic acid in acidic solution. The complexes were adsorbed on differently prepared Pt surfaces, at open circuit potential. The preliminary results show increased catalytic activity of Pt for formic acid oxidation with complex ion adsorbed on the polycrystalline surfaces. The increase in catalytic activity depends on the structure of the complex applied and follows the order of metal-coordinated bidentate ligand as Morphdtc > Pipdtc > 4-Mepipdtc. Based on IR and NMR data, the main characteristics of the Rdtc ligands do not vary dramatically, but high symmetry of the corresponding complexes decreases in the same order. Accordingly, the complexes are distinctively more mobile, causing chemical interactions to occur on the surface with appreciable speed and enhanced selectivity. The effect of the complexes on catalytic activity presumably depends on structural changes on Pt surfaces caused by their adsorption.
PB  - Maik Nauka/Interperiodica/Springer, New York
T2  - Russian Journal of Physical Chemistry A
T1  - Oxidation of formic acid on platinum surfaces decorated with cobalt(III) macrocyclic complexes
VL  - 83
IS  - 9
SP  - 1442
EP  - 1446
DO  - 10.1134/S0036024409090040
ER  - 

@article{
author = "Stevanović, Sanja and Babić-Samardžija, Ksenija and Sovilj, Sofija P. and Tripković, Amalija and Jovanović, Vladislava M.",
year = "2009",
abstract = "Platinum electrode decorated with three different mixed-ligand cobalt(III) complexes of the general formula [Co(Rdtc)cyclam](ClO4)(2) [cyclam = 1,4,8,11-tetraazacyclotetradecane, Rdtc(-) = morpholine-(Morphdtc), piperidine-(Pipdtc), and 4-methylpiperidine-(4-Mepipdtc) dithiocarbamates, respectively] was used to study oxidation of formic acid in acidic solution. The complexes were adsorbed on differently prepared Pt surfaces, at open circuit potential. The preliminary results show increased catalytic activity of Pt for formic acid oxidation with complex ion adsorbed on the polycrystalline surfaces. The increase in catalytic activity depends on the structure of the complex applied and follows the order of metal-coordinated bidentate ligand as Morphdtc > Pipdtc > 4-Mepipdtc. Based on IR and NMR data, the main characteristics of the Rdtc ligands do not vary dramatically, but high symmetry of the corresponding complexes decreases in the same order. Accordingly, the complexes are distinctively more mobile, causing chemical interactions to occur on the surface with appreciable speed and enhanced selectivity. The effect of the complexes on catalytic activity presumably depends on structural changes on Pt surfaces caused by their adsorption.",
publisher = "Maik Nauka/Interperiodica/Springer, New York",
journal = "Russian Journal of Physical Chemistry A",
title = "Oxidation of formic acid on platinum surfaces decorated with cobalt(III) macrocyclic complexes",
volume = "83",
number = "9",
pages = "1442-1446",
doi = "10.1134/S0036024409090040"
}

Stevanović, S., Babić-Samardžija, K., Sovilj, S. P., Tripković, A.,& Jovanović, V. M.. (2009). Oxidation of formic acid on platinum surfaces decorated with cobalt(III) macrocyclic complexes. in Russian Journal of Physical Chemistry A
Maik Nauka/Interperiodica/Springer, New York., 83(9), 1442-1446.
https://doi.org/10.1134/S0036024409090040

Stevanović S, Babić-Samardžija K, Sovilj SP, Tripković A, Jovanović VM. Oxidation of formic acid on platinum surfaces decorated with cobalt(III) macrocyclic complexes. in Russian Journal of Physical Chemistry A. 2009;83(9):1442-1446.
doi:10.1134/S0036024409090040 .

Stevanović, Sanja, Babić-Samardžija, Ksenija, Sovilj, Sofija P., Tripković, Amalija, Jovanović, Vladislava M., "Oxidation of formic acid on platinum surfaces decorated with cobalt(III) macrocyclic complexes" in Russian Journal of Physical Chemistry A, 83, no. 9 (2009):1442-1446,
https://doi.org/10.1134/S0036024409090040 . .

TY  - JOUR
AU  - Vujačić, Ana V.
AU  - Savić, J.Z.
AU  - Sovilj, Sofija P.
AU  - Mészáros, Szécsényi K.
AU  - Todorović, Nina
AU  - Petković, M.Z.
AU  - Vasić, Vesna M.
PY  - 2009
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/601
AB  - The kinetics of the reaction between the tetrachloroaurate(III) ion and l-methionine (l-Met) (0.1 M HClO4, pH 1.0-2.5) have been studied spectrophotometrically using a stopped-flow technique at different temperatures. Initially, the fast substitution reaction was ascribed to the formation of the short-lived square-planar Au(III)-(l-Met) that was followed by the replacement of a Cl- ligand and a subsequent, slower reduction to Au(I)-(l-Met). This is an intermolecular process, involving attack on the [AuCl4]- complex by an outer-sphere l-methionine. The activation parameters (ΔH≠ and ΔS≠) for substitution and reduction were determined. IR spectroscopy indicates that l-methionine acts as a bidentate ligand, most likely coordinating via the S and N atoms, while 1H and 13C NMR data indicate methionine sulfoxide as the final product. Finally, the components of the reaction were treated thermally in order to investigate the solid phase synthesis of the resulting complex.
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - Polyhedron
T1  - Mechanism of complex formation between [AuCl4]- and l-methionine
VL  - 28
IS  - 3
SP  - 593
EP  - 599
DO  - 10.1016/j.poly.2008.11.045
ER  - 

@article{
author = "Vujačić, Ana V. and Savić, J.Z. and Sovilj, Sofija P. and Mészáros, Szécsényi K. and Todorović, Nina and Petković, M.Z. and Vasić, Vesna M.",
year = "2009",
abstract = "The kinetics of the reaction between the tetrachloroaurate(III) ion and l-methionine (l-Met) (0.1 M HClO4, pH 1.0-2.5) have been studied spectrophotometrically using a stopped-flow technique at different temperatures. Initially, the fast substitution reaction was ascribed to the formation of the short-lived square-planar Au(III)-(l-Met) that was followed by the replacement of a Cl- ligand and a subsequent, slower reduction to Au(I)-(l-Met). This is an intermolecular process, involving attack on the [AuCl4]- complex by an outer-sphere l-methionine. The activation parameters (ΔH≠ and ΔS≠) for substitution and reduction were determined. IR spectroscopy indicates that l-methionine acts as a bidentate ligand, most likely coordinating via the S and N atoms, while 1H and 13C NMR data indicate methionine sulfoxide as the final product. Finally, the components of the reaction were treated thermally in order to investigate the solid phase synthesis of the resulting complex.",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "Polyhedron",
title = "Mechanism of complex formation between [AuCl4]- and l-methionine",
volume = "28",
number = "3",
pages = "593-599",
doi = "10.1016/j.poly.2008.11.045"
}

Vujačić, A. V., Savić, J.Z., Sovilj, S. P., Mészáros, S. K., Todorović, N., Petković, M.Z.,& Vasić, V. M.. (2009). Mechanism of complex formation between [AuCl4]- and l-methionine. in Polyhedron
Oxford : Pergamon-Elsevier Science Ltd., 28(3), 593-599.
https://doi.org/10.1016/j.poly.2008.11.045

Vujačić AV, Savić J, Sovilj SP, Mészáros SK, Todorović N, Petković M, Vasić VM. Mechanism of complex formation between [AuCl4]- and l-methionine. in Polyhedron. 2009;28(3):593-599.
doi:10.1016/j.poly.2008.11.045 .

Vujačić, Ana V., Savić, J.Z., Sovilj, Sofija P., Mészáros, Szécsényi K., Todorović, Nina, Petković, M.Z., Vasić, Vesna M., "Mechanism of complex formation between [AuCl4]- and l-methionine" in Polyhedron, 28, no. 3 (2009):593-599,
https://doi.org/10.1016/j.poly.2008.11.045 . .

TY  - JOUR
AU  - Babić-Samardžija, Ksenija
AU  - Hackerman, Norman
AU  - Sovilj, Sofija P.
AU  - Jovanović, Vladislava M.
PY  - 2008
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/483
AB  - The inhibiting effect of cobalt(III) complexes with macrocyclic ligand cyclam (1,4,8,11-tetraazacyclotetradecane) and β-diketonato ligands have been investigated on iron corrosion in 0.1 M HClO 4 by potentiodynamic, linear polarization resistance (LPR), and electrochemical impedance spectroscopy (EIS) measurements. Analysis of the polarization curves and impedance spectra, by adding complex compounds to the acid solution and comparing with inhibitor-free solution, show corrosion current decrease and charge transfer resistance increase, respectively. Impedance data are fitted with equivalent circuit models. The stability of the adsorbed film was followed by LPR. Scanning electron microscopy (SEM) was used to screen physical changes of the reacted surfaces both treated and untreated. The differences in inhibitor efficiencies depend on the substituent group of the coordinated β-diketone ligand. Structural and electronic properties of this group of compounds in relation to inhibitor efficiency were analyzed by using the molecular modeling structures and correlated with previously reported spectroscopy data.
T2  - Journal of Solid State Electrochemistry
T1  - The inhibiting effect of cobalt(III)-cyclam complexes with substituted β-diketones on iron corrosion in perchlorate solution
VL  - 12
IS  - 2
SP  - 155
EP  - 163
DO  - 10.1007/s10008-007-0375-4
ER  - 

@article{
author = "Babić-Samardžija, Ksenija and Hackerman, Norman and Sovilj, Sofija P. and Jovanović, Vladislava M.",
year = "2008",
abstract = "The inhibiting effect of cobalt(III) complexes with macrocyclic ligand cyclam (1,4,8,11-tetraazacyclotetradecane) and β-diketonato ligands have been investigated on iron corrosion in 0.1 M HClO 4 by potentiodynamic, linear polarization resistance (LPR), and electrochemical impedance spectroscopy (EIS) measurements. Analysis of the polarization curves and impedance spectra, by adding complex compounds to the acid solution and comparing with inhibitor-free solution, show corrosion current decrease and charge transfer resistance increase, respectively. Impedance data are fitted with equivalent circuit models. The stability of the adsorbed film was followed by LPR. Scanning electron microscopy (SEM) was used to screen physical changes of the reacted surfaces both treated and untreated. The differences in inhibitor efficiencies depend on the substituent group of the coordinated β-diketone ligand. Structural and electronic properties of this group of compounds in relation to inhibitor efficiency were analyzed by using the molecular modeling structures and correlated with previously reported spectroscopy data.",
journal = "Journal of Solid State Electrochemistry",
title = "The inhibiting effect of cobalt(III)-cyclam complexes with substituted β-diketones on iron corrosion in perchlorate solution",
volume = "12",
number = "2",
pages = "155-163",
doi = "10.1007/s10008-007-0375-4"
}

Babić-Samardžija, K., Hackerman, N., Sovilj, S. P.,& Jovanović, V. M.. (2008). The inhibiting effect of cobalt(III)-cyclam complexes with substituted β-diketones on iron corrosion in perchlorate solution. in Journal of Solid State Electrochemistry, 12(2), 155-163.
https://doi.org/10.1007/s10008-007-0375-4

Babić-Samardžija K, Hackerman N, Sovilj SP, Jovanović VM. The inhibiting effect of cobalt(III)-cyclam complexes with substituted β-diketones on iron corrosion in perchlorate solution. in Journal of Solid State Electrochemistry. 2008;12(2):155-163.
doi:10.1007/s10008-007-0375-4 .

Babić-Samardžija, Ksenija, Hackerman, Norman, Sovilj, Sofija P., Jovanović, Vladislava M., "The inhibiting effect of cobalt(III)-cyclam complexes with substituted β-diketones on iron corrosion in perchlorate solution" in Journal of Solid State Electrochemistry, 12, no. 2 (2008):155-163,
https://doi.org/10.1007/s10008-007-0375-4 . .

TY  - JOUR
AU  - Babić-Samardžija, Ksenija
AU  - Jovanović, Vladislava M.
AU  - Sovilj, Sofija P.
PY  - 2008
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/433
AB  - Four mixed-ligand cobalt(III) complexes (1-4) of the general formula [Co(Rdtc)cyclam](ClO4)2 and [Co(Rac)cyclam](ClO4)2 (cyclam = 1,4,8,11-tetra- azacyclotetradecane; Rdtc = thiomorpholine-(Timdtc) or 2-methylpiperidine-(2-Mepipdtc) dithiocarbamates; Rac = 1,1,1,5,5,5-hexafluoro-2,4-pentanedionato (Hfac) or 2,2,6,6-tetramethyl-3,5-heptanedionato (Tmhd), respectively) were electrochemically examined on a glassy carbon and an iron electrode in perchloric acid solution. The obtained results showed the influence of these complexes on hydrogen evolution, the oxygen reduction reaction and iron dissolution. The exhibited effects of the complexes on these reactions depend on structure related to the bidentate dithiocarbamato or b-diketonato ligand. The electrochemical properties of the complexes were correlated with molecular structure and parameters derived from spectral analysis and molecular modeling.
AB  - Četiri mešovito-ligandna kobalt(III) kompleksa opšte formule [Co(Rdtc)cyclam](ClO4)2 i [Co(Rac)cyclam](ClO4)2 (cyclam = 1,4,8,11-tetraazaciklotetradekan; Rdtc = tiomorfolin--(timdtc) ili 2-metilpiperidin-(2-mepipdtc) ditiokarbamat; Rac = 1,1,1,5,5,5-heksafluoro- -2,4-pentanedionato (hfac) ili 2,2,6,6-tetrametil-3,5-heptanedionato (tmhd)) ispitana su elektrohemijski na elektrodama od staklastog ugljenika i gvožđa u rastvoru perhlorata. Dobijeni rezultati ukazuju na to da ovi kompleksi utiču na izdvajanje vodonika, redukciju kiseonika kao i na rastvaranje gvožđa. Elektrohemijsko ponašanje zavisi od strukture koordinovanog bidentatnog ditiokarbamato ili b-diketonato liganda. Molekulska struktura kompleksnih jedinjenja određena je na osnovu spektroskopskih analiza i molekulskog modelovanja. Elektrokatalitički i inhibitorski efekat povezan je sa molekulskom strukturom kompleksa.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Molecular structure in correlation with electrochemical properties of mixed-ligand cobalt(III) complexes
T1  - Korelacija molekulske strukture i elektrohemijskih svojstava kobalt(III) kompleksa sa mešovitim ligandima
VL  - 73
IS  - 7
SP  - 761
EP  - 770
DO  - 10.2298/JSC0807761B
ER  - 

@article{
author = "Babić-Samardžija, Ksenija and Jovanović, Vladislava M. and Sovilj, Sofija P.",
year = "2008",
abstract = "Four mixed-ligand cobalt(III) complexes (1-4) of the general formula [Co(Rdtc)cyclam](ClO4)2 and [Co(Rac)cyclam](ClO4)2 (cyclam = 1,4,8,11-tetra- azacyclotetradecane; Rdtc = thiomorpholine-(Timdtc) or 2-methylpiperidine-(2-Mepipdtc) dithiocarbamates; Rac = 1,1,1,5,5,5-hexafluoro-2,4-pentanedionato (Hfac) or 2,2,6,6-tetramethyl-3,5-heptanedionato (Tmhd), respectively) were electrochemically examined on a glassy carbon and an iron electrode in perchloric acid solution. The obtained results showed the influence of these complexes on hydrogen evolution, the oxygen reduction reaction and iron dissolution. The exhibited effects of the complexes on these reactions depend on structure related to the bidentate dithiocarbamato or b-diketonato ligand. The electrochemical properties of the complexes were correlated with molecular structure and parameters derived from spectral analysis and molecular modeling., Četiri mešovito-ligandna kobalt(III) kompleksa opšte formule [Co(Rdtc)cyclam](ClO4)2 i [Co(Rac)cyclam](ClO4)2 (cyclam = 1,4,8,11-tetraazaciklotetradekan; Rdtc = tiomorfolin--(timdtc) ili 2-metilpiperidin-(2-mepipdtc) ditiokarbamat; Rac = 1,1,1,5,5,5-heksafluoro- -2,4-pentanedionato (hfac) ili 2,2,6,6-tetrametil-3,5-heptanedionato (tmhd)) ispitana su elektrohemijski na elektrodama od staklastog ugljenika i gvožđa u rastvoru perhlorata. Dobijeni rezultati ukazuju na to da ovi kompleksi utiču na izdvajanje vodonika, redukciju kiseonika kao i na rastvaranje gvožđa. Elektrohemijsko ponašanje zavisi od strukture koordinovanog bidentatnog ditiokarbamato ili b-diketonato liganda. Molekulska struktura kompleksnih jedinjenja određena je na osnovu spektroskopskih analiza i molekulskog modelovanja. Elektrokatalitički i inhibitorski efekat povezan je sa molekulskom strukturom kompleksa.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Molecular structure in correlation with electrochemical properties of mixed-ligand cobalt(III) complexes, Korelacija molekulske strukture i elektrohemijskih svojstava kobalt(III) kompleksa sa mešovitim ligandima",
volume = "73",
number = "7",
pages = "761-770",
doi = "10.2298/JSC0807761B"
}

Babić-Samardžija, K., Jovanović, V. M.,& Sovilj, S. P.. (2008). Molecular structure in correlation with electrochemical properties of mixed-ligand cobalt(III) complexes. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 73(7), 761-770.
https://doi.org/10.2298/JSC0807761B

Babić-Samardžija K, Jovanović VM, Sovilj SP. Molecular structure in correlation with electrochemical properties of mixed-ligand cobalt(III) complexes. in Journal of the Serbian Chemical Society. 2008;73(7):761-770.
doi:10.2298/JSC0807761B .

Babić-Samardžija, Ksenija, Jovanović, Vladislava M., Sovilj, Sofija P., "Molecular structure in correlation with electrochemical properties of mixed-ligand cobalt(III) complexes" in Journal of the Serbian Chemical Society, 73, no. 7 (2008):761-770,
https://doi.org/10.2298/JSC0807761B . .

TY  - JOUR
AU  - Drakulić, Branko
AU  - Sovilj, Sofija P.
PY  - 2007
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4308
AB  - In silico model of title drugs mode of interaction with Cu2+ ion was proposed. A hundred conformations of each drug are used in this study. Examination of drugs interactions with Cu2+ ion were conducted using GRID package. The Cu2+ probe was used. The two favorable regions of interactions were detected: a) the nitro group and terminal imino nitrogen in a γ position from it, as proposed from the experimental data, b) the region of heterocyclic ring (tiazoline and furan from Nizatidine and Ranitidine, respectively) as the most favorable one. Therefore, the present study identifies the second region of the molecule that is able to strongly interact with the Cu2+ ion, The position and energies of obtained molecular interaction fields (MIF) are discussed. The results support the fact that the properties, which express recognition forces of the molecules, are strongly dependent on 3D geometry.
PB  - Switzerland : Trans Tech Publications LTD
T2  - Materials Science Forum
T1  - A Cu2+ probe over nizatidine and ranitidine, or in Silico vs. experimentally obtained complexatlon of drugs
VL  - 555
SP  - 435
EP  - 439
DO  - 10.4028/0-87849-441-3.435
ER  - 

@article{
author = "Drakulić, Branko and Sovilj, Sofija P.",
year = "2007",
abstract = "In silico model of title drugs mode of interaction with Cu2+ ion was proposed. A hundred conformations of each drug are used in this study. Examination of drugs interactions with Cu2+ ion were conducted using GRID package. The Cu2+ probe was used. The two favorable regions of interactions were detected: a) the nitro group and terminal imino nitrogen in a γ position from it, as proposed from the experimental data, b) the region of heterocyclic ring (tiazoline and furan from Nizatidine and Ranitidine, respectively) as the most favorable one. Therefore, the present study identifies the second region of the molecule that is able to strongly interact with the Cu2+ ion, The position and energies of obtained molecular interaction fields (MIF) are discussed. The results support the fact that the properties, which express recognition forces of the molecules, are strongly dependent on 3D geometry.",
publisher = "Switzerland : Trans Tech Publications LTD",
journal = "Materials Science Forum",
title = "A Cu2+ probe over nizatidine and ranitidine, or in Silico vs. experimentally obtained complexatlon of drugs",
volume = "555",
pages = "435-439",
doi = "10.4028/0-87849-441-3.435"
}

Drakulić, B.,& Sovilj, S. P.. (2007). A Cu2+ probe over nizatidine and ranitidine, or in Silico vs. experimentally obtained complexatlon of drugs. in Materials Science Forum
Switzerland : Trans Tech Publications LTD., 555, 435-439.
https://doi.org/10.4028/0-87849-441-3.435

Drakulić B, Sovilj SP. A Cu2+ probe over nizatidine and ranitidine, or in Silico vs. experimentally obtained complexatlon of drugs. in Materials Science Forum. 2007;555:435-439.
doi:10.4028/0-87849-441-3.435 .

Drakulić, Branko, Sovilj, Sofija P., "A Cu2+ probe over nizatidine and ranitidine, or in Silico vs. experimentally obtained complexatlon of drugs" in Materials Science Forum, 555 (2007):435-439,
https://doi.org/10.4028/0-87849-441-3.435 . .

TY  - JOUR
AU  - Jovanović, Vladislava M.
AU  - Babić-Samardžija, Ksenija
AU  - Sovilj, Sofija P.
PY  - 2005
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/194
AB  - Eight mixed-ligand cobalt(III) complexes with the macrocyclic amine 1,4,8,11-tetraazacyclotetradecane (cyclam) and a heterocyclic dithiocarbamate (Rdtc-)i.e., morpholine-(Morphdtc), thiomorpholine- (Timdtc), piperazine-(Pzdtc), N-methylpiperazine-(Mepzdtc), piperidine- (Pipdtc), 2-, 3- or 4-methylpiperidine-(2-, 3- and 4-Mepipdtc) carbodithionato-S,S ions, of the general formula [Co(cyclam)Rdtc](ClO4)2, were investigated in deoxygenated 0.1 MHClO4 solutions. Cyclic voltammetry data at a glassy carbon (GC) electrode demonstrate a redox reaction of cobalt(III) from the complexes at potentials strongly influenced by the presence of different heterocyclic Rdtc- ligands. In this respect, the complexes were separated into two groups: the first, with a heteroatom O, S or N in the heterocyclic ring, and the second, with a methyl group on the piperidine ring of the Rdtc- ligand. Anodic polarization of an Fe electrode in the presence of the complexes shows their influence not only on the dissolution of iron but also on the hydrogen evolution reactions and on this basis complexes the complexes could be divided into the same two groups. It was found that the weaker the inhibiting effect of the free heterocyclic amines is, the significantly higher is the efficiency of the corresponding complexes.
AB  - Osam mešovito-ligandnih kompleksa kobalta(III) sa makrocikličnim aminom 1,4,8,11-tetraazaciklotetradekanom (cyclam) i heterocikličnim ditiokarbamatima (Rdtc-) t.j., morfolin-(Morphdtc), tiomorfolin-(Timdtc), piperazin-(Pzdtc), N-metilpiperazin-(Mepzdtc), piperidin-(Pipdtc), 2-, 3- ili 4-metilpiperidin- (2-, 3- i 4-Mepipdtc) karboditionato-S,S jonima, opšte formule [Co(cyclam)Rdtc)](ClO4)2 , ispitano je u 0,1 M HClO4 rastvoru na elektrodi od staklastog ugljenika i gvožđa. Ciklična voltametrija na elektrodi od staklastog ugljenika pokazala je da dolazi do redoks reakcije kobalt(III) jona iz kompleksa. Različiti heterociklični Rdtc- ligandi utiču na vrednost potencijala ove redoks reakcije. Na osnovu ovih vrednosti kompleksi se mogu podeliti u dve grupe: jednu sa heteroatomom u heterocikličnom prstenu i drugu sa metil-grupom na piperidinskom prstenu Rdtc- liganda. Anodna polarizacija gvožđa u prisustvu kompleksa pokazala je njihov uticaj ne samo na reakciju rastvaranja metala već i na reakciju izdvajanja vodonika. Rezultati su pokazali da što je slabiji inhibitorski efekat heterocikličnog amina to je veći uticaj odgovarajućeg kompleksa.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - The effect of heterocyclic S,S’-ligands on the electrochemical properties of some cobalt(III) complexes in acid
T1  - Uticaj heterocikličnih S,S’-liganada na elektrohemijske osobine nekih kobalt(III) kompleksa u kiseloj sredini
VL  - 70
IS  - 1
SP  - 51
EP  - 61
DO  - 10.2298/JSC0501051J
ER  - 

@article{
author = "Jovanović, Vladislava M. and Babić-Samardžija, Ksenija and Sovilj, Sofija P.",
year = "2005",
abstract = "Eight mixed-ligand cobalt(III) complexes with the macrocyclic amine 1,4,8,11-tetraazacyclotetradecane (cyclam) and a heterocyclic dithiocarbamate (Rdtc-)i.e., morpholine-(Morphdtc), thiomorpholine- (Timdtc), piperazine-(Pzdtc), N-methylpiperazine-(Mepzdtc), piperidine- (Pipdtc), 2-, 3- or 4-methylpiperidine-(2-, 3- and 4-Mepipdtc) carbodithionato-S,S ions, of the general formula [Co(cyclam)Rdtc](ClO4)2, were investigated in deoxygenated 0.1 MHClO4 solutions. Cyclic voltammetry data at a glassy carbon (GC) electrode demonstrate a redox reaction of cobalt(III) from the complexes at potentials strongly influenced by the presence of different heterocyclic Rdtc- ligands. In this respect, the complexes were separated into two groups: the first, with a heteroatom O, S or N in the heterocyclic ring, and the second, with a methyl group on the piperidine ring of the Rdtc- ligand. Anodic polarization of an Fe electrode in the presence of the complexes shows their influence not only on the dissolution of iron but also on the hydrogen evolution reactions and on this basis complexes the complexes could be divided into the same two groups. It was found that the weaker the inhibiting effect of the free heterocyclic amines is, the significantly higher is the efficiency of the corresponding complexes., Osam mešovito-ligandnih kompleksa kobalta(III) sa makrocikličnim aminom 1,4,8,11-tetraazaciklotetradekanom (cyclam) i heterocikličnim ditiokarbamatima (Rdtc-) t.j., morfolin-(Morphdtc), tiomorfolin-(Timdtc), piperazin-(Pzdtc), N-metilpiperazin-(Mepzdtc), piperidin-(Pipdtc), 2-, 3- ili 4-metilpiperidin- (2-, 3- i 4-Mepipdtc) karboditionato-S,S jonima, opšte formule [Co(cyclam)Rdtc)](ClO4)2 , ispitano je u 0,1 M HClO4 rastvoru na elektrodi od staklastog ugljenika i gvožđa. Ciklična voltametrija na elektrodi od staklastog ugljenika pokazala je da dolazi do redoks reakcije kobalt(III) jona iz kompleksa. Različiti heterociklični Rdtc- ligandi utiču na vrednost potencijala ove redoks reakcije. Na osnovu ovih vrednosti kompleksi se mogu podeliti u dve grupe: jednu sa heteroatomom u heterocikličnom prstenu i drugu sa metil-grupom na piperidinskom prstenu Rdtc- liganda. Anodna polarizacija gvožđa u prisustvu kompleksa pokazala je njihov uticaj ne samo na reakciju rastvaranja metala već i na reakciju izdvajanja vodonika. Rezultati su pokazali da što je slabiji inhibitorski efekat heterocikličnog amina to je veći uticaj odgovarajućeg kompleksa.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "The effect of heterocyclic S,S’-ligands on the electrochemical properties of some cobalt(III) complexes in acid, Uticaj heterocikličnih S,S’-liganada na elektrohemijske osobine nekih kobalt(III) kompleksa u kiseloj sredini",
volume = "70",
number = "1",
pages = "51-61",
doi = "10.2298/JSC0501051J"
}

Jovanović, V. M., Babić-Samardžija, K.,& Sovilj, S. P.. (2005). The effect of heterocyclic S,S’-ligands on the electrochemical properties of some cobalt(III) complexes in acid. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 70(1), 51-61.
https://doi.org/10.2298/JSC0501051J

Jovanović VM, Babić-Samardžija K, Sovilj SP. The effect of heterocyclic S,S’-ligands on the electrochemical properties of some cobalt(III) complexes in acid. in Journal of the Serbian Chemical Society. 2005;70(1):51-61.
doi:10.2298/JSC0501051J .

Jovanović, Vladislava M., Babić-Samardžija, Ksenija, Sovilj, Sofija P., "The effect of heterocyclic S,S’-ligands on the electrochemical properties of some cobalt(III) complexes in acid" in Journal of the Serbian Chemical Society, 70, no. 1 (2005):51-61,
https://doi.org/10.2298/JSC0501051J . .

TY  - JOUR
AU  - Babić-Samardžija, Ksenija
AU  - Sovilj, Sofija P.
AU  - Jovanović, Vladislava M.
PY  - 2003
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/119
AB  - The electrochemical properties of eight mixed-ligand cobalt(III) and co balt(II) complexes of the general formulas [CoIII(Rac)cyclam (ClO4)2 (1)–(4) and [Co2II(Rac)tpmc](ClO4)3 (5)–(8) were studied. The substances were investigated in aqueous NaClO4 solution and non-aqueous LiClO4/CH3CN solution by cyclic voltam metry at a glassy carbon electrode. In aqueous solution, cyclam and Rac ligands being soluble in water undergo anodic oxidation. Coordination to Co(III) in complexes 1–4, stabilizes these ligands but reversible peaks in catohodic region indicate the redox reaction CoIII/CoII ion. In the case of the binuclear Co(II) complexes 5–8, peaks recorded on the CVs represent oxidation of the bridged Rac ligand. The complexes examined influence the cathodic reaction of hydrogen evolution in aqueous solutions by shifting its potential to more negative values and its current is increased. In non-aqueous solution the CVs of the ligands show irreversible anodic peaks for cyclam, tpmc and for the Rac ligands soluble in acetonitrile. The absence of any peaks in the case of the investigated complexes 1–4 indicates that coordination to Co(III) stabilizes both the cyclam and Rac ligands. Cyclic voltammograms of the complexes 5–8 show oxidation processes of the Rac ligand and Co(II) ions but the absence of a highly anodic peak of the coordinated macrocycle tpmc shows its stabilization. Contrary to in aqueous solution, the redox reaction Co(III)/Co(II) does not occur in acetonitrate indicating a higher stability of the complexes 1–4 in this media in comparison with the binuclear cobalt(II)-tpmc complexes 5–8.
AB  - Cikličnom voltametrijom ispitano je osam kompleksa kobalta(III) i kobalta(II)sa mešovitim ligandima, opšte formule CoIII(Rac)cyclam (ClO4)2 (1)–(4) i CoII(Rac)tpmc (ClO4)3 (5)–(8), u vodenoj (NaClO4) i nevodenoj (LiClO4/CH3CN) sredini. U vodenoj sredini cyclam i Rac ligandi podležu anodnoj oksidaciji. Koordinacija sa Co(III) u komp- leksima (1)–(4) stabilizuje ove ligande ali dolazi do redoks reakcije Co(III)/Co(II).U slučaju binukelarnih Co(II) kompleksa (5)–(8) dolazi do oksidacije Rac liganada. Ispitivani kompleksi u vodenom rastvoru utiču na reakciju izdvajanja vodonika katodno pomerajući potencijal i povećavajući struju. U nevodenim rastvorima anodno se oksiduju oba makrociklična (cyclam i tpmc) i Rac ligandi rastvorni u acetonitrilu. Međutim, u ovim rastvorima Co(III) kompleksa ne dolazi do elektrohemijskih reakcija što znači ne samo da i ovde koordinacija sa kobaltom stabilizuje ligande već nema ni redoks reakcije za kobalt. Sa druge strane, u Co(II) komplesima stabilizovan je tpmc ali se oksiduju Rac ligandi i Co(II) pa su tako u nevodenim rastvorima kompleksi Co(III) stabiliniji od binukelarnih Co(II)-tpmc kompleksa.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Comparative electrochemical study of some cobalt(III) and cobalt(II) complexes with azamacrocyles and β-diketonato ligands
T1  - Komparativno elektrohemijsko ispitivanje nekih kobalt(III)i kobalt(II) kompleksa sa azamakrocikličnim i β-diketonato ligandima
VL  - 68
IS  - 12
SP  - 989
EP  - 999
DO  - 10.2298/0352-51390312989B
ER  - 

@article{
author = "Babić-Samardžija, Ksenija and Sovilj, Sofija P. and Jovanović, Vladislava M.",
year = "2003",
abstract = "The electrochemical properties of eight mixed-ligand cobalt(III) and co balt(II) complexes of the general formulas [CoIII(Rac)cyclam (ClO4)2 (1)–(4) and [Co2II(Rac)tpmc](ClO4)3 (5)–(8) were studied. The substances were investigated in aqueous NaClO4 solution and non-aqueous LiClO4/CH3CN solution by cyclic voltam metry at a glassy carbon electrode. In aqueous solution, cyclam and Rac ligands being soluble in water undergo anodic oxidation. Coordination to Co(III) in complexes 1–4, stabilizes these ligands but reversible peaks in catohodic region indicate the redox reaction CoIII/CoII ion. In the case of the binuclear Co(II) complexes 5–8, peaks recorded on the CVs represent oxidation of the bridged Rac ligand. The complexes examined influence the cathodic reaction of hydrogen evolution in aqueous solutions by shifting its potential to more negative values and its current is increased. In non-aqueous solution the CVs of the ligands show irreversible anodic peaks for cyclam, tpmc and for the Rac ligands soluble in acetonitrile. The absence of any peaks in the case of the investigated complexes 1–4 indicates that coordination to Co(III) stabilizes both the cyclam and Rac ligands. Cyclic voltammograms of the complexes 5–8 show oxidation processes of the Rac ligand and Co(II) ions but the absence of a highly anodic peak of the coordinated macrocycle tpmc shows its stabilization. Contrary to in aqueous solution, the redox reaction Co(III)/Co(II) does not occur in acetonitrate indicating a higher stability of the complexes 1–4 in this media in comparison with the binuclear cobalt(II)-tpmc complexes 5–8., Cikličnom voltametrijom ispitano je osam kompleksa kobalta(III) i kobalta(II)sa mešovitim ligandima, opšte formule CoIII(Rac)cyclam (ClO4)2 (1)–(4) i CoII(Rac)tpmc (ClO4)3 (5)–(8), u vodenoj (NaClO4) i nevodenoj (LiClO4/CH3CN) sredini. U vodenoj sredini cyclam i Rac ligandi podležu anodnoj oksidaciji. Koordinacija sa Co(III) u komp- leksima (1)–(4) stabilizuje ove ligande ali dolazi do redoks reakcije Co(III)/Co(II).U slučaju binukelarnih Co(II) kompleksa (5)–(8) dolazi do oksidacije Rac liganada. Ispitivani kompleksi u vodenom rastvoru utiču na reakciju izdvajanja vodonika katodno pomerajući potencijal i povećavajući struju. U nevodenim rastvorima anodno se oksiduju oba makrociklična (cyclam i tpmc) i Rac ligandi rastvorni u acetonitrilu. Međutim, u ovim rastvorima Co(III) kompleksa ne dolazi do elektrohemijskih reakcija što znači ne samo da i ovde koordinacija sa kobaltom stabilizuje ligande već nema ni redoks reakcije za kobalt. Sa druge strane, u Co(II) komplesima stabilizovan je tpmc ali se oksiduju Rac ligandi i Co(II) pa su tako u nevodenim rastvorima kompleksi Co(III) stabiliniji od binukelarnih Co(II)-tpmc kompleksa.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Comparative electrochemical study of some cobalt(III) and cobalt(II) complexes with azamacrocyles and β-diketonato ligands, Komparativno elektrohemijsko ispitivanje nekih kobalt(III)i kobalt(II) kompleksa sa azamakrocikličnim i β-diketonato ligandima",
volume = "68",
number = "12",
pages = "989-999",
doi = "10.2298/0352-51390312989B"
}

Babić-Samardžija, K., Sovilj, S. P.,& Jovanović, V. M.. (2003). Comparative electrochemical study of some cobalt(III) and cobalt(II) complexes with azamacrocyles and β-diketonato ligands. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 68(12), 989-999.
https://doi.org/10.2298/0352-51390312989B

Babić-Samardžija K, Sovilj SP, Jovanović VM. Comparative electrochemical study of some cobalt(III) and cobalt(II) complexes with azamacrocyles and β-diketonato ligands. in Journal of the Serbian Chemical Society. 2003;68(12):989-999.
doi:10.2298/0352-51390312989B .

Babić-Samardžija, Ksenija, Sovilj, Sofija P., Jovanović, Vladislava M., "Comparative electrochemical study of some cobalt(III) and cobalt(II) complexes with azamacrocyles and β-diketonato ligands" in Journal of the Serbian Chemical Society, 68, no. 12 (2003):989-999,
https://doi.org/10.2298/0352-51390312989B . .

TY  - JOUR
AU  - Jovanović, Vladislava M.
AU  - Babić-Samardžija, Ksenija
AU  - Sovilj, Sofija P.
PY  - 2001
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3656
AB  - Electrochemical stability of eight complexes of the general formula [co 111 Rdtc(1-8)cyclam](ClO 4 ) 2 , where cyclam=1,4,8,11-tetraazacyclotetradecane and Rdtc - (1-8)=4-morpholine (Morphdtc), 4-thiomorpholine (Timdtc), 4-piperazine (Pzdtc), N-methyl piperazine (N-Mepzdtc), piperidine (Pipdtc), 2-, 3- or 4-methylpiperidine (2-, 3- or 4-Mepipdtc) dithiocarbamates, respectively, were studied. The substances were examined in aqueous NaClO 4 solution and nonaqueous LiClO 4 in CH 3 CN solution by cyclic voltammetry. In aqueous solution, macrocyclic ligand cyclam is characterized by the anodic peak at 0.95 V. The Rdtc - ligands have two anodic peaks, one in the region 0.25-0.30 V and the other in the 0.78-0.95 V region. Absence of these anodic peaks in the case of the complexes indicates that coordination to cobalt(III) stabilizes both cyclam and Rdtc - ligands, but reversible peaks in the range -0.68 to -0.78 V support the Co(III) redox reaction. In nonaqueous solutions cyclam has one anodic peak at 1.75 V. The ligands with heteroatom in the ring (Morphdtc, Timdtc, Pzdtc, N-Mepzdtc) have two anodic peaks, while the other four ligands (Pipdtc, 2-, 3- and 4-Mepipdtc) have only one anodic peak. In nonaqueous solution again, coordination to Co(III) ion stabilizes the Rdtc - ligands and contrary to aqueous solution no Co(III) redox reaction occurs, indicating a greater stability of the complexes in this media. Finally, the electrochemical results are compared with spectroscopic data obtained previously.
PB  - Wiley-VCH Verlag GmbH
T2  - Electroanalysis
T1  - Electrochemical examination of mixed-ligand cobalt(III) complexes with tetraazamacrocyclic ligand and heterocyclic dithiocarbamates
VL  - 13
IS  - 13
SP  - 1129
EP  - 1135
DO  - 10.1002/1521-4109(200109)13:13<1129::AID-ELAN1129>3.0.CO;2-K
ER  - 

@article{
author = "Jovanović, Vladislava M. and Babić-Samardžija, Ksenija and Sovilj, Sofija P.",
year = "2001",
abstract = "Electrochemical stability of eight complexes of the general formula [co 111 Rdtc(1-8)cyclam](ClO 4 ) 2 , where cyclam=1,4,8,11-tetraazacyclotetradecane and Rdtc - (1-8)=4-morpholine (Morphdtc), 4-thiomorpholine (Timdtc), 4-piperazine (Pzdtc), N-methyl piperazine (N-Mepzdtc), piperidine (Pipdtc), 2-, 3- or 4-methylpiperidine (2-, 3- or 4-Mepipdtc) dithiocarbamates, respectively, were studied. The substances were examined in aqueous NaClO 4 solution and nonaqueous LiClO 4 in CH 3 CN solution by cyclic voltammetry. In aqueous solution, macrocyclic ligand cyclam is characterized by the anodic peak at 0.95 V. The Rdtc - ligands have two anodic peaks, one in the region 0.25-0.30 V and the other in the 0.78-0.95 V region. Absence of these anodic peaks in the case of the complexes indicates that coordination to cobalt(III) stabilizes both cyclam and Rdtc - ligands, but reversible peaks in the range -0.68 to -0.78 V support the Co(III) redox reaction. In nonaqueous solutions cyclam has one anodic peak at 1.75 V. The ligands with heteroatom in the ring (Morphdtc, Timdtc, Pzdtc, N-Mepzdtc) have two anodic peaks, while the other four ligands (Pipdtc, 2-, 3- and 4-Mepipdtc) have only one anodic peak. In nonaqueous solution again, coordination to Co(III) ion stabilizes the Rdtc - ligands and contrary to aqueous solution no Co(III) redox reaction occurs, indicating a greater stability of the complexes in this media. Finally, the electrochemical results are compared with spectroscopic data obtained previously.",
publisher = "Wiley-VCH Verlag GmbH",
journal = "Electroanalysis",
title = "Electrochemical examination of mixed-ligand cobalt(III) complexes with tetraazamacrocyclic ligand and heterocyclic dithiocarbamates",
volume = "13",
number = "13",
pages = "1129-1135",
doi = "10.1002/1521-4109(200109)13:13<1129::AID-ELAN1129>3.0.CO;2-K"
}

Jovanović, V. M., Babić-Samardžija, K.,& Sovilj, S. P.. (2001). Electrochemical examination of mixed-ligand cobalt(III) complexes with tetraazamacrocyclic ligand and heterocyclic dithiocarbamates. in Electroanalysis
Wiley-VCH Verlag GmbH., 13(13), 1129-1135.
https://doi.org/10.1002/1521-4109(200109)13:13<1129::AID-ELAN1129>3.0.CO;2-K

Jovanović VM, Babić-Samardžija K, Sovilj SP. Electrochemical examination of mixed-ligand cobalt(III) complexes with tetraazamacrocyclic ligand and heterocyclic dithiocarbamates. in Electroanalysis. 2001;13(13):1129-1135.
doi:10.1002/1521-4109(200109)13:13<1129::AID-ELAN1129>3.0.CO;2-K .

Jovanović, Vladislava M., Babić-Samardžija, Ksenija, Sovilj, Sofija P., "Electrochemical examination of mixed-ligand cobalt(III) complexes with tetraazamacrocyclic ligand and heterocyclic dithiocarbamates" in Electroanalysis, 13, no. 13 (2001):1129-1135,
https://doi.org/10.1002/1521-4109(200109)13:13<1129::AID-ELAN1129>3.0.CO;2-K . .

TY  - JOUR
AU  - Sovilj, Sofija P.
AU  - Vučković, Gordana
AU  - Babić-Samardžija, Ksenija
AU  - Matsumoto, N.
AU  - Jovanović, Vladislava M.
AU  - Mrozinski, J.
PY  - 1999
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3672
AB  - A new dinuclear cobalt(II) complex, [Co2(ox)tpmc](ClO4)2 3H2O, (tpmc = N, N′, N″, N″′-tetrakis(2-pyridylmethyl)-1, 4, 8, 11-tetraazacyclotetradecane, ox2 -oxalate ion), has been synthesized and its crystal structure solved by single crystal X-ray diffraction studies. It crystallizes in the monoclinic system, space group P21, with a = 97558(8) A, b = 21.455(2) A, c - 21.241(2) A, β=100.069(8)°, V=4391.0(8) A3, Z =4,R = 0.083, Rw = 0.086. Its structure consists of two dinuclear, crystallographically unique molecules in which the oxalate ion bridges two cobalt(II) ions unsymmetrically. E:ach cobalt is hexa-coordinated with four macrocyclic nitrogens and two oxygens in an octahedral arrangement of an “em” coordination of a macrocyclic ligand. The third oxygen is simultaneously bonded to both cobalt ions and the last one remains uncoordinated, which is the unique way of oxalato ion coordination. Intramolecular antiferromagnetic coupling between the two cobalt(II) ions is observed and yielded J = -9.3 an−1, g - 5.64 and g = 1.21. The variable temperature (4.2-192 K) inagiietic susceptibility nieasureinents are interpreted on the basis of the spin lamiltonian H 25/9JSASB + goβHz(SAZ - SBZ). Cyclic voltanllnetiy suggests that the complex is electrochcmically stable up to the potential of the cobalt reduction.
PB  - Taylor and Francis
T2  - Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry
T1  - Synthesis, crystal structure, magnetic properties and cyclic voltammetry of the unsymmetric (μ-oxalato)-[N,N′,N″,N‴-tetrakis-(2-pyridylmethyl)-1,4,8, 11-tetraazacyclotetra-decane]dicobalt(II) perchlorate trihydrate
VL  - 29
IS  - 5
SP  - 785
EP  - 803
DO  - 10.1080/00945719909349487
ER  - 

@article{
author = "Sovilj, Sofija P. and Vučković, Gordana and Babić-Samardžija, Ksenija and Matsumoto, N. and Jovanović, Vladislava M. and Mrozinski, J.",
year = "1999",
abstract = "A new dinuclear cobalt(II) complex, [Co2(ox)tpmc](ClO4)2 3H2O, (tpmc = N, N′, N″, N″′-tetrakis(2-pyridylmethyl)-1, 4, 8, 11-tetraazacyclotetradecane, ox2 -oxalate ion), has been synthesized and its crystal structure solved by single crystal X-ray diffraction studies. It crystallizes in the monoclinic system, space group P21, with a = 97558(8) A, b = 21.455(2) A, c - 21.241(2) A, β=100.069(8)°, V=4391.0(8) A3, Z =4,R = 0.083, Rw = 0.086. Its structure consists of two dinuclear, crystallographically unique molecules in which the oxalate ion bridges two cobalt(II) ions unsymmetrically. E:ach cobalt is hexa-coordinated with four macrocyclic nitrogens and two oxygens in an octahedral arrangement of an “em” coordination of a macrocyclic ligand. The third oxygen is simultaneously bonded to both cobalt ions and the last one remains uncoordinated, which is the unique way of oxalato ion coordination. Intramolecular antiferromagnetic coupling between the two cobalt(II) ions is observed and yielded J = -9.3 an−1, g - 5.64 and g = 1.21. The variable temperature (4.2-192 K) inagiietic susceptibility nieasureinents are interpreted on the basis of the spin lamiltonian H 25/9JSASB + goβHz(SAZ - SBZ). Cyclic voltanllnetiy suggests that the complex is electrochcmically stable up to the potential of the cobalt reduction.",
publisher = "Taylor and Francis",
journal = "Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry",
title = "Synthesis, crystal structure, magnetic properties and cyclic voltammetry of the unsymmetric (μ-oxalato)-[N,N′,N″,N‴-tetrakis-(2-pyridylmethyl)-1,4,8, 11-tetraazacyclotetra-decane]dicobalt(II) perchlorate trihydrate",
volume = "29",
number = "5",
pages = "785-803",
doi = "10.1080/00945719909349487"
}

Sovilj, S. P., Vučković, G., Babić-Samardžija, K., Matsumoto, N., Jovanović, V. M.,& Mrozinski, J.. (1999). Synthesis, crystal structure, magnetic properties and cyclic voltammetry of the unsymmetric (μ-oxalato)-[N,N′,N″,N‴-tetrakis-(2-pyridylmethyl)-1,4,8, 11-tetraazacyclotetra-decane]dicobalt(II) perchlorate trihydrate. in Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry
Taylor and Francis., 29(5), 785-803.
https://doi.org/10.1080/00945719909349487

Sovilj SP, Vučković G, Babić-Samardžija K, Matsumoto N, Jovanović VM, Mrozinski J. Synthesis, crystal structure, magnetic properties and cyclic voltammetry of the unsymmetric (μ-oxalato)-[N,N′,N″,N‴-tetrakis-(2-pyridylmethyl)-1,4,8, 11-tetraazacyclotetra-decane]dicobalt(II) perchlorate trihydrate. in Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry. 1999;29(5):785-803.
doi:10.1080/00945719909349487 .

Sovilj, Sofija P., Vučković, Gordana, Babić-Samardžija, Ksenija, Matsumoto, N., Jovanović, Vladislava M., Mrozinski, J., "Synthesis, crystal structure, magnetic properties and cyclic voltammetry of the unsymmetric (μ-oxalato)-[N,N′,N″,N‴-tetrakis-(2-pyridylmethyl)-1,4,8, 11-tetraazacyclotetra-decane]dicobalt(II) perchlorate trihydrate" in Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry, 29, no. 5 (1999):785-803,
https://doi.org/10.1080/00945719909349487 . .