TY  - JOUR
AU  - Jovanović, Dragana
AU  - Stanojković, Jovana
AU  - Halilović, Dženeta
AU  - Kolašinac, Rejhana
AU  - Kop, Tatjana
AU  - Bjelaković, Mira
AU  - Milić, Dragana
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4921
AB  - A large series of disubstituted fulleropyrrolidines was synthesized and analyzed by cyclic voltammetry. The three main groups of target com­pounds differ by a flexible N-chain, while their further diversity was achieved by the introduction of various rigid, aryl substituents at the pyrrolidine carbon. Some dialkyl analogues were also designed for comparison, A standard [3+2]-cycloaddition of in situ generated azomethine ylides to C60 afforded a variety of disubstituted fulleropyrrolidines. Furthermore, a set of dumbbell-shaped di(fulleropyrrolidine) derivatives containing rigid fumaryl or isophthaloyl diamide platform was prepared with the aim of investigating a long-range effect of the second fulleropyrrolidine moiety on their electrochemical pro­perties. All compounds were fully characterized by comparative analysis of spectral data, while examination of electrochemical properties was performed on representative samples, distinguished by main structural subunits. All com­pounds expressed quite similar electron-accepting ability, lower than C60, but higher in comparison to structurally similar N-methylfulleropyrrolidine.
AB  - Велика серија дисупституисаних фулеропиролидина је синтетисана и анализирана цикличном волтаметријом. Три главне групе циљних једињења разликују се по флекси- билном бочном низу на атому азота, а додатна диверсификација постигнута је увођењем различитих крутих, арил-супституената на пиролидинском атому угљеника. За поре- ђење су синтетисани и одређени диалкил-аналози. Сет дисупституисаних фулеропиро- лидина добијен је стандардном [3+2]-циклоадицијом ин ситу генерисаних азометинских илида на C60. Осим тога, у циљу испитивања даљинског утицаја фулеропиролидинске структуре на електрохемијске особине, синтетисани су и дифулеренски деривати код којих су терминално позициониране фулеренске подјединице премошћене фумарилном или изофталоилном крутом платформом. Сва једињења су у потпуности окарактерисана упоредном анализом спектралних података, док је сет одабраних једињења, са разли- кама у главним структурним подјединицама, искоришћен за испитивање електрохемиј- ских особина. Сва испитивана једињења показала су врло сличну способност прихватања електрона, нижу у односу на C60, а вишу од структурно сличног N-метилфулеропиро- лидина.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Fulleropyrrolidines with orthogonally flexible substituents - synthesis and electrochemical properties
T1  - Фулеропиролидини са ортогонално флексибилним супституентима – синтеза и електрохемијске особине
VL  - 86
IS  - 11
SP  - 1023
EP  - 1037
DO  - 10.2298/JSC210708069J
ER  - 

@article{
author = "Jovanović, Dragana and Stanojković, Jovana and Halilović, Dženeta and Kolašinac, Rejhana and Kop, Tatjana and Bjelaković, Mira and Milić, Dragana",
year = "2021",
abstract = "A large series of disubstituted fulleropyrrolidines was synthesized and analyzed by cyclic voltammetry. The three main groups of target com­pounds differ by a flexible N-chain, while their further diversity was achieved by the introduction of various rigid, aryl substituents at the pyrrolidine carbon. Some dialkyl analogues were also designed for comparison, A standard [3+2]-cycloaddition of in situ generated azomethine ylides to C60 afforded a variety of disubstituted fulleropyrrolidines. Furthermore, a set of dumbbell-shaped di(fulleropyrrolidine) derivatives containing rigid fumaryl or isophthaloyl diamide platform was prepared with the aim of investigating a long-range effect of the second fulleropyrrolidine moiety on their electrochemical pro­perties. All compounds were fully characterized by comparative analysis of spectral data, while examination of electrochemical properties was performed on representative samples, distinguished by main structural subunits. All com­pounds expressed quite similar electron-accepting ability, lower than C60, but higher in comparison to structurally similar N-methylfulleropyrrolidine., Велика серија дисупституисаних фулеропиролидина је синтетисана и анализирана цикличном волтаметријом. Три главне групе циљних једињења разликују се по флекси- билном бочном низу на атому азота, а додатна диверсификација постигнута је увођењем различитих крутих, арил-супституената на пиролидинском атому угљеника. За поре- ђење су синтетисани и одређени диалкил-аналози. Сет дисупституисаних фулеропиро- лидина добијен је стандардном [3+2]-циклоадицијом ин ситу генерисаних азометинских илида на C60. Осим тога, у циљу испитивања даљинског утицаја фулеропиролидинске структуре на електрохемијске особине, синтетисани су и дифулеренски деривати код којих су терминално позициониране фулеренске подјединице премошћене фумарилном или изофталоилном крутом платформом. Сва једињења су у потпуности окарактерисана упоредном анализом спектралних података, док је сет одабраних једињења, са разли- кама у главним структурним подјединицама, искоришћен за испитивање електрохемиј- ских особина. Сва испитивана једињења показала су врло сличну способност прихватања електрона, нижу у односу на C60, а вишу од структурно сличног N-метилфулеропиро- лидина.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Fulleropyrrolidines with orthogonally flexible substituents - synthesis and electrochemical properties, Фулеропиролидини са ортогонално флексибилним супституентима – синтеза и електрохемијске особине",
volume = "86",
number = "11",
pages = "1023-1037",
doi = "10.2298/JSC210708069J"
}

Jovanović, D., Stanojković, J., Halilović, D., Kolašinac, R., Kop, T., Bjelaković, M.,& Milić, D.. (2021). Fulleropyrrolidines with orthogonally flexible substituents - synthesis and electrochemical properties. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 86(11), 1023-1037.
https://doi.org/10.2298/JSC210708069J

Jovanović D, Stanojković J, Halilović D, Kolašinac R, Kop T, Bjelaković M, Milić D. Fulleropyrrolidines with orthogonally flexible substituents - synthesis and electrochemical properties. in Journal of the Serbian Chemical Society. 2021;86(11):1023-1037.
doi:10.2298/JSC210708069J .

Jovanović, Dragana, Stanojković, Jovana, Halilović, Dženeta, Kolašinac, Rejhana, Kop, Tatjana, Bjelaković, Mira, Milić, Dragana, "Fulleropyrrolidines with orthogonally flexible substituents - synthesis and electrochemical properties" in Journal of the Serbian Chemical Society, 86, no. 11 (2021):1023-1037,
https://doi.org/10.2298/JSC210708069J . .

TY  - JOUR
AU  - Jovanović, Svetlana
AU  - Dorontić, Slađana
AU  - Jovanović, Dragana
AU  - Ciasca, Gabriele
AU  - Budimir, Milica
AU  - Bonasera, Aurelio
AU  - Scopelliti, Michelangelo
AU  - Marković, Olivera
AU  - Todorović Marković, Biljana
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3593
AB  - Due to the low consumption of chemicals, the absence of toxic residual side products, the procedure simplicity and time-saving aspects, gamma irradiation offers advantages over the classical chemical protocols. We successfully employed gamma irradiation in order to introduce N-atoms in Graphene Quantum Dots (GQDs). By irradiating GQDs water dispersions in the presence of isopropyl alcohol and ethylenediamine, at doses of 25, 50 and 200 kGy, we attached amino groups onto GQDs in a single synthetic step. At the same time, a chemical reduction is achieved, too. Selected conditions induced incorporation of N-atoms within GDQs atomic lattice (around 3 at%), at all applied doses. Additionally, the C-atoms percentage was highly increased, from 63 to 79 at % or higher. The zeta potential of dots changed from −34.6 to +9.1 mV, due to the modification of functionalizing groups localized at the surface. Produced chemical changes lead to the desired alteration of the GQDs optical properties, such as an increased photoluminescence intensity, a higher photoluminescence quantum yields (from 2.07 to 18.40%) and a narrowing of the spectral features in the emission spectra. The ability of gamma-irradiated GQDs to quench free radical species was investigated and positively assessed; additionally, non-enzymatic optical detection of Cu(II) ions using GQDs as a sensor was studied and the detection limits are
herein reported. These results suggest that GQDs can be potentially applied as smart photoluminescent sensors for metal cations.
PB  - Elsevier
T2  - Ceramics International
T1  - Gamma irradiation of graphene quantum dots with ethylenediamine: Antioxidant for ion sensing
VL  - 46
IS  - 15
SP  - 23611
EP  - 23622
DO  - 10.1016/j.ceramint.2020.06.133
ER  - 

@article{
author = "Jovanović, Svetlana and Dorontić, Slađana and Jovanović, Dragana and Ciasca, Gabriele and Budimir, Milica and Bonasera, Aurelio and Scopelliti, Michelangelo and Marković, Olivera and Todorović Marković, Biljana",
year = "2020",
abstract = "Due to the low consumption of chemicals, the absence of toxic residual side products, the procedure simplicity and time-saving aspects, gamma irradiation offers advantages over the classical chemical protocols. We successfully employed gamma irradiation in order to introduce N-atoms in Graphene Quantum Dots (GQDs). By irradiating GQDs water dispersions in the presence of isopropyl alcohol and ethylenediamine, at doses of 25, 50 and 200 kGy, we attached amino groups onto GQDs in a single synthetic step. At the same time, a chemical reduction is achieved, too. Selected conditions induced incorporation of N-atoms within GDQs atomic lattice (around 3 at%), at all applied doses. Additionally, the C-atoms percentage was highly increased, from 63 to 79 at % or higher. The zeta potential of dots changed from −34.6 to +9.1 mV, due to the modification of functionalizing groups localized at the surface. Produced chemical changes lead to the desired alteration of the GQDs optical properties, such as an increased photoluminescence intensity, a higher photoluminescence quantum yields (from 2.07 to 18.40%) and a narrowing of the spectral features in the emission spectra. The ability of gamma-irradiated GQDs to quench free radical species was investigated and positively assessed; additionally, non-enzymatic optical detection of Cu(II) ions using GQDs as a sensor was studied and the detection limits are
herein reported. These results suggest that GQDs can be potentially applied as smart photoluminescent sensors for metal cations.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "Gamma irradiation of graphene quantum dots with ethylenediamine: Antioxidant for ion sensing",
volume = "46",
number = "15",
pages = "23611-23622",
doi = "10.1016/j.ceramint.2020.06.133"
}

Jovanović, S., Dorontić, S., Jovanović, D., Ciasca, G., Budimir, M., Bonasera, A., Scopelliti, M., Marković, O.,& Todorović Marković, B.. (2020). Gamma irradiation of graphene quantum dots with ethylenediamine: Antioxidant for ion sensing. in Ceramics International
Elsevier., 46(15), 23611-23622.
https://doi.org/10.1016/j.ceramint.2020.06.133

Jovanović S, Dorontić S, Jovanović D, Ciasca G, Budimir M, Bonasera A, Scopelliti M, Marković O, Todorović Marković B. Gamma irradiation of graphene quantum dots with ethylenediamine: Antioxidant for ion sensing. in Ceramics International. 2020;46(15):23611-23622.
doi:10.1016/j.ceramint.2020.06.133 .

Jovanović, Svetlana, Dorontić, Slađana, Jovanović, Dragana, Ciasca, Gabriele, Budimir, Milica, Bonasera, Aurelio, Scopelliti, Michelangelo, Marković, Olivera, Todorović Marković, Biljana, "Gamma irradiation of graphene quantum dots with ethylenediamine: Antioxidant for ion sensing" in Ceramics International, 46, no. 15 (2020):23611-23622,
https://doi.org/10.1016/j.ceramint.2020.06.133 . .

TY  - JOUR
AU  - Jovanović, Svetlana
AU  - Dorontić, Slađana
AU  - Jovanović, Dragana
AU  - Ciasca, Gabriele
AU  - Budimir, Milica
AU  - Bonasera, Aurelio
AU  - Scopelliti, Michelangelo
AU  - Marković, Olivera
AU  - Todorović Marković, Biljana
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3621
AB  - Due to the low consumption of chemicals, the absence of toxic residual side products, the procedure simplicity and time-saving aspects, gamma irradiation offers advantages over the classical chemical protocols. We successfully employed gamma irradiation in order to introduce N-atoms in Graphene Quantum Dots (GQDs). By irradiating GQDs water dispersions in the presence of isopropyl alcohol and ethylenediamine, at doses of 25, 50 and 200 kGy, we attached amino groups onto GQDs in a single synthetic step. At the same time, a chemical reduction is achieved, too. Selected conditions induced incorporation of N-atoms within GDQs atomic lattice (around 3 at%), at all applied doses. Additionally, the C-atoms percentage was highly increased, from 63 to 79 at % or higher. The zeta potential of dots changed from −34.6 to +9.1 mV, due to the modification of functionalizing groups localized at the surface. Produced chemical changes lead to the desired alteration of the GQDs optical properties, such as an increased photoluminescence intensity, a higher photoluminescence quantum yields (from 2.07 to 18.40%) and a narrowing of the spectral features in the emission spectra. The ability of gamma-irradiated GQDs to quench free radical species was investigated and positively assessed; additionally, non-enzymatic optical detection of Cu(II) ions using GQDs as a sensor was studied and the detection limits areherein reported. These results suggest that GQDs can be potentially applied as smart photoluminescent sensors for metal cations.
PB  - Elsevier
T2  - Ceramics International
T1  - Gamma irradiation of graphene quantum dots with ethylenediamine: Antioxidant for ion sensing
VL  - 46
IS  - 15
SP  - 23611
EP  - 23622
DO  - 10.1016/j.ceramint.2020.06.133
ER  - 

@article{
author = "Jovanović, Svetlana and Dorontić, Slađana and Jovanović, Dragana and Ciasca, Gabriele and Budimir, Milica and Bonasera, Aurelio and Scopelliti, Michelangelo and Marković, Olivera and Todorović Marković, Biljana",
year = "2020",
abstract = "Due to the low consumption of chemicals, the absence of toxic residual side products, the procedure simplicity and time-saving aspects, gamma irradiation offers advantages over the classical chemical protocols. We successfully employed gamma irradiation in order to introduce N-atoms in Graphene Quantum Dots (GQDs). By irradiating GQDs water dispersions in the presence of isopropyl alcohol and ethylenediamine, at doses of 25, 50 and 200 kGy, we attached amino groups onto GQDs in a single synthetic step. At the same time, a chemical reduction is achieved, too. Selected conditions induced incorporation of N-atoms within GDQs atomic lattice (around 3 at%), at all applied doses. Additionally, the C-atoms percentage was highly increased, from 63 to 79 at % or higher. The zeta potential of dots changed from −34.6 to +9.1 mV, due to the modification of functionalizing groups localized at the surface. Produced chemical changes lead to the desired alteration of the GQDs optical properties, such as an increased photoluminescence intensity, a higher photoluminescence quantum yields (from 2.07 to 18.40%) and a narrowing of the spectral features in the emission spectra. The ability of gamma-irradiated GQDs to quench free radical species was investigated and positively assessed; additionally, non-enzymatic optical detection of Cu(II) ions using GQDs as a sensor was studied and the detection limits areherein reported. These results suggest that GQDs can be potentially applied as smart photoluminescent sensors for metal cations.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "Gamma irradiation of graphene quantum dots with ethylenediamine: Antioxidant for ion sensing",
volume = "46",
number = "15",
pages = "23611-23622",
doi = "10.1016/j.ceramint.2020.06.133"
}

Jovanović, S., Dorontić, S., Jovanović, D., Ciasca, G., Budimir, M., Bonasera, A., Scopelliti, M., Marković, O.,& Todorović Marković, B.. (2020). Gamma irradiation of graphene quantum dots with ethylenediamine: Antioxidant for ion sensing. in Ceramics International
Elsevier., 46(15), 23611-23622.
https://doi.org/10.1016/j.ceramint.2020.06.133

Jovanović S, Dorontić S, Jovanović D, Ciasca G, Budimir M, Bonasera A, Scopelliti M, Marković O, Todorović Marković B. Gamma irradiation of graphene quantum dots with ethylenediamine: Antioxidant for ion sensing. in Ceramics International. 2020;46(15):23611-23622.
doi:10.1016/j.ceramint.2020.06.133 .

Jovanović, Svetlana, Dorontić, Slađana, Jovanović, Dragana, Ciasca, Gabriele, Budimir, Milica, Bonasera, Aurelio, Scopelliti, Michelangelo, Marković, Olivera, Todorović Marković, Biljana, "Gamma irradiation of graphene quantum dots with ethylenediamine: Antioxidant for ion sensing" in Ceramics International, 46, no. 15 (2020):23611-23622,
https://doi.org/10.1016/j.ceramint.2020.06.133 . .

TY  - JOUR
AU  - Jovanović, Dragana D.
AU  - Paunović, Katarina
AU  - Manojlović, Dragan
AU  - Jakovljevic, Branko
AU  - Rasic-Milutinovic, Zorica
AU  - Dojčinović, Biljana
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1111
AB  - Background: Arsenic is constantly present in drinking water supply systems of Zrenjanin municipality across decades. It presents a great public health problem in Serbia, but its relationship with acute coronary syndrome (ACS) has not been studied previously. Objectives: The aims of this study were to assess the incidence of ACS in two areas from Zrenjanin municipality consuming different levels of arsenic in drinking water, and to explore the association between arsenic exposure and the probability of fatal outcome of ACS. Methods: The research was a registry-based ecological study of two populations consuming water with different arsenic levels, based on current guidelines (10 mu g/L). Median arsenic in the area above national standard was 80 mu g/L; median arsenic in the other area was 1 mu g/L. Newly diagnosed cases of ACS were obtained from the National Registry for Acute Coronary Syndrome from 2006 to 2010. Results: The two populations were comparable by age, gender, and prevalence of risk factors for ACS. Standardized incidence rates (SIR) of ACS were higher for people consuming arsenic above standard (average five-year SIR was 237.00 per 100.000: 95% CI=214.93-260.74), in comparison to people consuming arsenic within limits (average SIR=124.40 per 100.000; 95% CI=96.00-158.56). Exposure to arsenic above limits was insignificantly associated with fatal outcome of ACS for the whole population, men and women. Conclusions: Consumption of arsenic above national standards was associated with higher risk for the occurrence of acute coronary syndrome and with insignificantly higher probability of fatal outcome of ACS in Zrenjanin municipality.
PB  - Academic Press Inc Elsevier Science, San Diego
T2  - Environmental Research
T1  - Arsenic in drinking water and acute coronary syndrome in Zrenjanin municipality, Serbia
VL  - 117
SP  - 75
EP  - 82
DO  - 10.1016/j.envres.2012.04.016
ER  - 

@article{
author = "Jovanović, Dragana D. and Paunović, Katarina and Manojlović, Dragan and Jakovljevic, Branko and Rasic-Milutinovic, Zorica and Dojčinović, Biljana",
year = "2012",
abstract = "Background: Arsenic is constantly present in drinking water supply systems of Zrenjanin municipality across decades. It presents a great public health problem in Serbia, but its relationship with acute coronary syndrome (ACS) has not been studied previously. Objectives: The aims of this study were to assess the incidence of ACS in two areas from Zrenjanin municipality consuming different levels of arsenic in drinking water, and to explore the association between arsenic exposure and the probability of fatal outcome of ACS. Methods: The research was a registry-based ecological study of two populations consuming water with different arsenic levels, based on current guidelines (10 mu g/L). Median arsenic in the area above national standard was 80 mu g/L; median arsenic in the other area was 1 mu g/L. Newly diagnosed cases of ACS were obtained from the National Registry for Acute Coronary Syndrome from 2006 to 2010. Results: The two populations were comparable by age, gender, and prevalence of risk factors for ACS. Standardized incidence rates (SIR) of ACS were higher for people consuming arsenic above standard (average five-year SIR was 237.00 per 100.000: 95% CI=214.93-260.74), in comparison to people consuming arsenic within limits (average SIR=124.40 per 100.000; 95% CI=96.00-158.56). Exposure to arsenic above limits was insignificantly associated with fatal outcome of ACS for the whole population, men and women. Conclusions: Consumption of arsenic above national standards was associated with higher risk for the occurrence of acute coronary syndrome and with insignificantly higher probability of fatal outcome of ACS in Zrenjanin municipality.",
publisher = "Academic Press Inc Elsevier Science, San Diego",
journal = "Environmental Research",
title = "Arsenic in drinking water and acute coronary syndrome in Zrenjanin municipality, Serbia",
volume = "117",
pages = "75-82",
doi = "10.1016/j.envres.2012.04.016"
}

Jovanović, D. D., Paunović, K., Manojlović, D., Jakovljevic, B., Rasic-Milutinovic, Z.,& Dojčinović, B.. (2012). Arsenic in drinking water and acute coronary syndrome in Zrenjanin municipality, Serbia. in Environmental Research
Academic Press Inc Elsevier Science, San Diego., 117, 75-82.
https://doi.org/10.1016/j.envres.2012.04.016

Jovanović DD, Paunović K, Manojlović D, Jakovljevic B, Rasic-Milutinovic Z, Dojčinović B. Arsenic in drinking water and acute coronary syndrome in Zrenjanin municipality, Serbia. in Environmental Research. 2012;117:75-82.
doi:10.1016/j.envres.2012.04.016 .

Jovanović, Dragana D., Paunović, Katarina, Manojlović, Dragan, Jakovljevic, Branko, Rasic-Milutinovic, Zorica, Dojčinović, Biljana, "Arsenic in drinking water and acute coronary syndrome in Zrenjanin municipality, Serbia" in Environmental Research, 117 (2012):75-82,
https://doi.org/10.1016/j.envres.2012.04.016 . .