TY  - CONF
AU  - Maksimović, Jelena
AU  - Čupić, Željko
AU  - Anić, Slobodan
AU  - Kolar-Anić, Ljiljana
AU  - Greco, Emanuela
AU  - Cervellati, Rinaldo
AU  - Pagnacco, Maja
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6965
AB  - The effect of different concentration of gallic acid (GA) on the oscillatory behavior of the Briggs-Rauscher (BR) reaction is reported. In this work, the sample was injected before the start of oscillations. The main effect is the appearance of an induction time that increases with the concentration of GA added. Other parameters as a number of oscillations and oscillatory period are 
affected. These latter linearly depend on the concentration and can be used for quantitative GA analytical assay in a GA concentration range 3.00×10-5 M − 4.00×10-4 M. The perturbation is very different from that previously reported, in which samples of phenolics were added to an active BR mixture, indicating that the mechanism of perturbation largely depends on the injection point.
PB  - Society of Physical Chemists of Serbia
C3  - Proceedings - 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2018, September 24-28, 2018 Belgrade, Serbia
T1  - Gallic acid effect on the Briggs-Rauscher reaction dynamics
VL  - 1
SP  - 337
EP  - 340
UR  - https://hdl.handle.net/21.15107/rcub_cer_6965
ER  - 

@conference{
author = "Maksimović, Jelena and Čupić, Željko and Anić, Slobodan and Kolar-Anić, Ljiljana and Greco, Emanuela and Cervellati, Rinaldo and Pagnacco, Maja",
year = "2018",
abstract = "The effect of different concentration of gallic acid (GA) on the oscillatory behavior of the Briggs-Rauscher (BR) reaction is reported. In this work, the sample was injected before the start of oscillations. The main effect is the appearance of an induction time that increases with the concentration of GA added. Other parameters as a number of oscillations and oscillatory period are 
affected. These latter linearly depend on the concentration and can be used for quantitative GA analytical assay in a GA concentration range 3.00×10-5 M − 4.00×10-4 M. The perturbation is very different from that previously reported, in which samples of phenolics were added to an active BR mixture, indicating that the mechanism of perturbation largely depends on the injection point.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Proceedings - 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2018, September 24-28, 2018 Belgrade, Serbia",
title = "Gallic acid effect on the Briggs-Rauscher reaction dynamics",
volume = "1",
pages = "337-340",
url = "https://hdl.handle.net/21.15107/rcub_cer_6965"
}

Maksimović, J., Čupić, Ž., Anić, S., Kolar-Anić, L., Greco, E., Cervellati, R.,& Pagnacco, M.. (2018). Gallic acid effect on the Briggs-Rauscher reaction dynamics. in Proceedings - 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2018, September 24-28, 2018 Belgrade, Serbia
Society of Physical Chemists of Serbia., 1, 337-340.
https://hdl.handle.net/21.15107/rcub_cer_6965

Maksimović J, Čupić Ž, Anić S, Kolar-Anić L, Greco E, Cervellati R, Pagnacco M. Gallic acid effect on the Briggs-Rauscher reaction dynamics. in Proceedings - 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2018, September 24-28, 2018 Belgrade, Serbia. 2018;1:337-340.
https://hdl.handle.net/21.15107/rcub_cer_6965 .

Maksimović, Jelena, Čupić, Željko, Anić, Slobodan, Kolar-Anić, Ljiljana, Greco, Emanuela, Cervellati, Rinaldo, Pagnacco, Maja, "Gallic acid effect on the Briggs-Rauscher reaction dynamics" in Proceedings - 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2018, September 24-28, 2018 Belgrade, Serbia, 1 (2018):337-340,
https://hdl.handle.net/21.15107/rcub_cer_6965 .

TY  - JOUR
AU  - Cervellati, Rinaldo
AU  - Greco, Emanuela
AU  - Blagojević, Slavica
AU  - Blagojević, Stevan
AU  - Anić, Slobodan
AU  - Čupić, Željko
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2462
AB  - The system KSCN-H2O2-CuSO4-NaOH, also known as the OrbA n-Epstein oscillatory reaction, is exposed to external perturbations by several phenolic compounds: catechol, resorcinol, hydroquinone, 2,5-dihydroxybenzoic acid, 2,6-dihydroxybenzoic acid, 2,3-dihydroxybenzoic acid, 2,4-dihydroxybenzoic acid, 3,4-dihydroxybenzoic acid, 3,5-dihydroxybenzoic acid, caffeic acid, and ferulic acid. As a result of the performed perturbation in most examined cases, oscillations have been inhibited for some characteristic time, and resumed afterwards. The evaluated inhibition time is typical for each substance and strongly dependent on its concentration. The chemical mechanism of the interaction between the OrbA n-Epstein system and phenolic compounds is briefly discussed. Numerical simulations are performed using the original OrbA n-Epstein model with 30 reactions, extended by three reactions describing the interaction with inhibitory substances. The rate constants of three added reactions are adjusted to fit experimental inhibition times, and compared among used compounds. The observed effects are discussed further in relation with the bond dissociation enthalpy theory. Unlike other tested compounds, 2,5-dihydroxybenzoic acid remains off from predicted order of activity.
PB  - Springer Netherlands
T2  - Reaction Kinetics, Mechanisms and Catalysis
T1  - Experimental and mechanistic study of the inhibitory effects by phenolics on the oscillations of the OrbA n-Epstein Reaction
VL  - 123
IS  - 1
SP  - 125
EP  - 139
DO  - 10.1007/s11144-017-1306-8
ER  - 

@article{
author = "Cervellati, Rinaldo and Greco, Emanuela and Blagojević, Slavica and Blagojević, Stevan and Anić, Slobodan and Čupić, Željko",
year = "2018",
abstract = "The system KSCN-H2O2-CuSO4-NaOH, also known as the OrbA n-Epstein oscillatory reaction, is exposed to external perturbations by several phenolic compounds: catechol, resorcinol, hydroquinone, 2,5-dihydroxybenzoic acid, 2,6-dihydroxybenzoic acid, 2,3-dihydroxybenzoic acid, 2,4-dihydroxybenzoic acid, 3,4-dihydroxybenzoic acid, 3,5-dihydroxybenzoic acid, caffeic acid, and ferulic acid. As a result of the performed perturbation in most examined cases, oscillations have been inhibited for some characteristic time, and resumed afterwards. The evaluated inhibition time is typical for each substance and strongly dependent on its concentration. The chemical mechanism of the interaction between the OrbA n-Epstein system and phenolic compounds is briefly discussed. Numerical simulations are performed using the original OrbA n-Epstein model with 30 reactions, extended by three reactions describing the interaction with inhibitory substances. The rate constants of three added reactions are adjusted to fit experimental inhibition times, and compared among used compounds. The observed effects are discussed further in relation with the bond dissociation enthalpy theory. Unlike other tested compounds, 2,5-dihydroxybenzoic acid remains off from predicted order of activity.",
publisher = "Springer Netherlands",
journal = "Reaction Kinetics, Mechanisms and Catalysis",
title = "Experimental and mechanistic study of the inhibitory effects by phenolics on the oscillations of the OrbA n-Epstein Reaction",
volume = "123",
number = "1",
pages = "125-139",
doi = "10.1007/s11144-017-1306-8"
}

Cervellati, R., Greco, E., Blagojević, S., Blagojević, S., Anić, S.,& Čupić, Ž.. (2018). Experimental and mechanistic study of the inhibitory effects by phenolics on the oscillations of the OrbA n-Epstein Reaction. in Reaction Kinetics, Mechanisms and Catalysis
Springer Netherlands., 123(1), 125-139.
https://doi.org/10.1007/s11144-017-1306-8

Cervellati R, Greco E, Blagojević S, Blagojević S, Anić S, Čupić Ž. Experimental and mechanistic study of the inhibitory effects by phenolics on the oscillations of the OrbA n-Epstein Reaction. in Reaction Kinetics, Mechanisms and Catalysis. 2018;123(1):125-139.
doi:10.1007/s11144-017-1306-8 .

Cervellati, Rinaldo, Greco, Emanuela, Blagojević, Slavica, Blagojević, Stevan, Anić, Slobodan, Čupić, Željko, "Experimental and mechanistic study of the inhibitory effects by phenolics on the oscillations of the OrbA n-Epstein Reaction" in Reaction Kinetics, Mechanisms and Catalysis, 123, no. 1 (2018):125-139,
https://doi.org/10.1007/s11144-017-1306-8 . .

TY  - JOUR
AU  - Čupić, Željko
AU  - Greco, Emanuela
AU  - Cervellati, Rinaldo
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1781
AB  - The KSCN-H2O2-NaOH-Cu(II)-catalyzed system is one of the few reactions in which chemical oscillations can be observed in batch conditions. In the present paper, this oscillating reaction was revisited in a wide range of initial concentrations of all components in batch. A mixture with a long lasting oscillation time (1 h 34 min) and a great number of oscillations (24) was found and used to investigate the effect of temperature. An Arrhenius-type temperature dependence was observed from which an apparent average activation energy E-av = 76 +/- 5 kJ for the overall oscillatory reaction was observed. A mechanistic study based on a modified model analyzed by the stoichiometric network analysis approach gave a satisfactory agreement between calculated and experimental oscillating behaviors and temperature dependence. The addition of the three diphenols (catechol, resorcinol, and hydroquinone) causes perturbations similar to those observed in the Briggs-Rauscher oscillating system, i.e., an inhibition of the oscillatory regime. These inhibitory effects were described in detail, and a reasonable qualitative interpretation is given.
PB  - Wiley-Blackwell, Hoboken
T2  - International Journal of Chemical Kinetics
T1  - New Experimental and Mechanistic Investigation on the KSCN-H2O2-NaOH-Cu(II)-Catalyzed Oscillating System (Orban-Epstein Reaction): Inhibitory Effects by Diphenols
VL  - 47
IS  - 2
SP  - 82
EP  - 92
DO  - 10.1002/kin.20894
ER  - 

@article{
author = "Čupić, Željko and Greco, Emanuela and Cervellati, Rinaldo",
year = "2015",
abstract = "The KSCN-H2O2-NaOH-Cu(II)-catalyzed system is one of the few reactions in which chemical oscillations can be observed in batch conditions. In the present paper, this oscillating reaction was revisited in a wide range of initial concentrations of all components in batch. A mixture with a long lasting oscillation time (1 h 34 min) and a great number of oscillations (24) was found and used to investigate the effect of temperature. An Arrhenius-type temperature dependence was observed from which an apparent average activation energy E-av = 76 +/- 5 kJ for the overall oscillatory reaction was observed. A mechanistic study based on a modified model analyzed by the stoichiometric network analysis approach gave a satisfactory agreement between calculated and experimental oscillating behaviors and temperature dependence. The addition of the three diphenols (catechol, resorcinol, and hydroquinone) causes perturbations similar to those observed in the Briggs-Rauscher oscillating system, i.e., an inhibition of the oscillatory regime. These inhibitory effects were described in detail, and a reasonable qualitative interpretation is given.",
publisher = "Wiley-Blackwell, Hoboken",
journal = "International Journal of Chemical Kinetics",
title = "New Experimental and Mechanistic Investigation on the KSCN-H2O2-NaOH-Cu(II)-Catalyzed Oscillating System (Orban-Epstein Reaction): Inhibitory Effects by Diphenols",
volume = "47",
number = "2",
pages = "82-92",
doi = "10.1002/kin.20894"
}

Čupić, Ž., Greco, E.,& Cervellati, R.. (2015). New Experimental and Mechanistic Investigation on the KSCN-H2O2-NaOH-Cu(II)-Catalyzed Oscillating System (Orban-Epstein Reaction): Inhibitory Effects by Diphenols. in International Journal of Chemical Kinetics
Wiley-Blackwell, Hoboken., 47(2), 82-92.
https://doi.org/10.1002/kin.20894

Čupić Ž, Greco E, Cervellati R. New Experimental and Mechanistic Investigation on the KSCN-H2O2-NaOH-Cu(II)-Catalyzed Oscillating System (Orban-Epstein Reaction): Inhibitory Effects by Diphenols. in International Journal of Chemical Kinetics. 2015;47(2):82-92.
doi:10.1002/kin.20894 .

Čupić, Željko, Greco, Emanuela, Cervellati, Rinaldo, "New Experimental and Mechanistic Investigation on the KSCN-H2O2-NaOH-Cu(II)-Catalyzed Oscillating System (Orban-Epstein Reaction): Inhibitory Effects by Diphenols" in International Journal of Chemical Kinetics, 47, no. 2 (2015):82-92,
https://doi.org/10.1002/kin.20894 . .

TY  - JOUR
AU  - Čupić, Željko
AU  - Kolar-Anić, Ljiljana
AU  - Anić, Slobodan
AU  - Macesic, Stevan R.
AU  - Maksimović, Jelena
AU  - Pavlović, Marko S.
AU  - Milenković, Maja
AU  - Bubanja, Itana Nuša
AU  - Greco, Emanuela
AU  - Furrow, Stanley D.
AU  - Cervellati, Rinaldo
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1505
AB  - The intermittency or intermittent bursting as the type of dynamic state when two qualitatively different behaviors replace one another randomly during the course of the reaction, although all the control parameters remain constant, is found in the Briggs Symbol of the Klingon Empire Rauscher oscillating system moderated by a very small amount of phenol. Within a range of phenol concentrations, the oscillation amplitude is diminished considerably, and after oscillations cease, they repeat intermittently, giving several bursts of oscillations. For the concentrations used here, the range of phenol concentrations where intermittent bursting oscillations occur in a closed reactor is ca. 1.8x10(-5) to 3.6x10(-5) M. Bursting also occurs in an open reactor and can be sustained indefinitely at 5.53x10(-5) M concentration. The intermittent bursting behavior is robust, and can be achieved at a variety of conditions.
PB  - Wiley-V C H Verlag Gmbh, Weinheim
T2  - Helvetica Chimica Acta
T1  - Regularity of Intermittent Bursts in Briggs Symbol of the Klingon Empire Rauscher Oscillating Systems with Phenol
VL  - 97
IS  - 3
SP  - 321
EP  - 333
DO  - 10.1002/hlca.201300178
ER  - 

@article{
author = "Čupić, Željko and Kolar-Anić, Ljiljana and Anić, Slobodan and Macesic, Stevan R. and Maksimović, Jelena and Pavlović, Marko S. and Milenković, Maja and Bubanja, Itana Nuša and Greco, Emanuela and Furrow, Stanley D. and Cervellati, Rinaldo",
year = "2014",
abstract = "The intermittency or intermittent bursting as the type of dynamic state when two qualitatively different behaviors replace one another randomly during the course of the reaction, although all the control parameters remain constant, is found in the Briggs Symbol of the Klingon Empire Rauscher oscillating system moderated by a very small amount of phenol. Within a range of phenol concentrations, the oscillation amplitude is diminished considerably, and after oscillations cease, they repeat intermittently, giving several bursts of oscillations. For the concentrations used here, the range of phenol concentrations where intermittent bursting oscillations occur in a closed reactor is ca. 1.8x10(-5) to 3.6x10(-5) M. Bursting also occurs in an open reactor and can be sustained indefinitely at 5.53x10(-5) M concentration. The intermittent bursting behavior is robust, and can be achieved at a variety of conditions.",
publisher = "Wiley-V C H Verlag Gmbh, Weinheim",
journal = "Helvetica Chimica Acta",
title = "Regularity of Intermittent Bursts in Briggs Symbol of the Klingon Empire Rauscher Oscillating Systems with Phenol",
volume = "97",
number = "3",
pages = "321-333",
doi = "10.1002/hlca.201300178"
}

Čupić, Ž., Kolar-Anić, L., Anić, S., Macesic, S. R., Maksimović, J., Pavlović, M. S., Milenković, M., Bubanja, I. N., Greco, E., Furrow, S. D.,& Cervellati, R.. (2014). Regularity of Intermittent Bursts in Briggs Symbol of the Klingon Empire Rauscher Oscillating Systems with Phenol. in Helvetica Chimica Acta
Wiley-V C H Verlag Gmbh, Weinheim., 97(3), 321-333.
https://doi.org/10.1002/hlca.201300178

Čupić Ž, Kolar-Anić L, Anić S, Macesic SR, Maksimović J, Pavlović MS, Milenković M, Bubanja IN, Greco E, Furrow SD, Cervellati R. Regularity of Intermittent Bursts in Briggs Symbol of the Klingon Empire Rauscher Oscillating Systems with Phenol. in Helvetica Chimica Acta. 2014;97(3):321-333.
doi:10.1002/hlca.201300178 .

Čupić, Željko, Kolar-Anić, Ljiljana, Anić, Slobodan, Macesic, Stevan R., Maksimović, Jelena, Pavlović, Marko S., Milenković, Maja, Bubanja, Itana Nuša, Greco, Emanuela, Furrow, Stanley D., Cervellati, Rinaldo, "Regularity of Intermittent Bursts in Briggs Symbol of the Klingon Empire Rauscher Oscillating Systems with Phenol" in Helvetica Chimica Acta, 97, no. 3 (2014):321-333,
https://doi.org/10.1002/hlca.201300178 . .