TY  - JOUR
AU  - Romanović, Mima Č.
AU  - Milenković, Milica R.
AU  - Pevec, Andrej
AU  - Turel, Iztok
AU  - Spasojević, Vojislav
AU  - Grubišić, Sonja
AU  - Radanović, Dušanka
AU  - Anđelković, Katarina
AU  - Čobeljić, Božidar
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1898
AB  - A tridentate NNO condensation product of 2-quinolinecarboxaldehyde and Girards T reagent (HLC1) in the presence of azide ions coordinates with cobalt(II) giving mononuclear azido Co(II) complex [CoHL (N-3)(3)](1) as a main product and dinuclear end-on azido bridged Co(II) complex [Co2L2(mu-(1,1)-N-3)(2)(N-3)(2)] (2) in traces. Crystal structures of both complexes were determined. Variable temperature magnetic susceptibility measurement studies of complex I showed that Co(II) cation is in the low-spin state with t(2g)(6)e(g)(1) (S = 1/2) configuration. DFT-BS calculations for complex 2 anticipated ferromagnetic type interaction between paramagnetic centers (J = 53 cm(-1)). (C) 2017 Elsevier Ltd. All rights reserved.
T2  - Polyhedron
T1  - Crystal structures, magnetic properties and DFT study of cobalt(II) azido complexes with the condensation product of 2-quinolinecarboxaldehyde and Girards T reagent
VL  - 139
SP  - 142
EP  - 147
DO  - 10.1016/j.poly.2017.10.018
ER  - 

@article{
author = "Romanović, Mima Č. and Milenković, Milica R. and Pevec, Andrej and Turel, Iztok and Spasojević, Vojislav and Grubišić, Sonja and Radanović, Dušanka and Anđelković, Katarina and Čobeljić, Božidar",
year = "2018",
abstract = "A tridentate NNO condensation product of 2-quinolinecarboxaldehyde and Girards T reagent (HLC1) in the presence of azide ions coordinates with cobalt(II) giving mononuclear azido Co(II) complex [CoHL (N-3)(3)](1) as a main product and dinuclear end-on azido bridged Co(II) complex [Co2L2(mu-(1,1)-N-3)(2)(N-3)(2)] (2) in traces. Crystal structures of both complexes were determined. Variable temperature magnetic susceptibility measurement studies of complex I showed that Co(II) cation is in the low-spin state with t(2g)(6)e(g)(1) (S = 1/2) configuration. DFT-BS calculations for complex 2 anticipated ferromagnetic type interaction between paramagnetic centers (J = 53 cm(-1)). (C) 2017 Elsevier Ltd. All rights reserved.",
journal = "Polyhedron",
title = "Crystal structures, magnetic properties and DFT study of cobalt(II) azido complexes with the condensation product of 2-quinolinecarboxaldehyde and Girards T reagent",
volume = "139",
pages = "142-147",
doi = "10.1016/j.poly.2017.10.018"
}

Romanović, M. Č., Milenković, M. R., Pevec, A., Turel, I., Spasojević, V., Grubišić, S., Radanović, D., Anđelković, K.,& Čobeljić, B.. (2018). Crystal structures, magnetic properties and DFT study of cobalt(II) azido complexes with the condensation product of 2-quinolinecarboxaldehyde and Girards T reagent. in Polyhedron, 139, 142-147.
https://doi.org/10.1016/j.poly.2017.10.018

Romanović MČ, Milenković MR, Pevec A, Turel I, Spasojević V, Grubišić S, Radanović D, Anđelković K, Čobeljić B. Crystal structures, magnetic properties and DFT study of cobalt(II) azido complexes with the condensation product of 2-quinolinecarboxaldehyde and Girards T reagent. in Polyhedron. 2018;139:142-147.
doi:10.1016/j.poly.2017.10.018 .

Romanović, Mima Č., Milenković, Milica R., Pevec, Andrej, Turel, Iztok, Spasojević, Vojislav, Grubišić, Sonja, Radanović, Dušanka, Anđelković, Katarina, Čobeljić, Božidar, "Crystal structures, magnetic properties and DFT study of cobalt(II) azido complexes with the condensation product of 2-quinolinecarboxaldehyde and Girards T reagent" in Polyhedron, 139 (2018):142-147,
https://doi.org/10.1016/j.poly.2017.10.018 . .

TY  - JOUR
AU  - Božić, Bojana
AU  - Korać, Jelena
AU  - Stanković, Dalibor M.
AU  - Stanić, Marina
AU  - Romanović, Mima Č.
AU  - Bogdanović-Pristov, Jelena
AU  - Spasić, Snežana D.
AU  - Popović-Bijelić, Ana D.
AU  - Spasojević, Ivan
AU  - Bajčetić, Milica
PY  - 2018
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0891584918311213
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7896
AB  - An increase in the copper pool in body fluids has been related to a number of pathological conditions, including infections. Copper ions may affect antibiotics via the formation of coordination bonds and/or redox reactions. Herein, we analyzed the interactions of Cu2+ with eight β-lactam antibiotics using UV–Vis spectrophotometry, EPR spectroscopy, and electrochemical methods. Penicillin G did not show any detectable interactions with Cu2+. Ampicillin, amoxicillin and cephalexin formed stable colored complexes with octahedral coordination environment of Cu2+ with tetragonal distortion, and primary amine group as the site of coordinate bond formation. These β-lactams increased the solubility of Cu2+ in the phosphate buffer. Ceftazidime and Cu2+ formed a complex with a similar geometry and gave rise to an organic radical. Ceftriaxone-Cu2+ complex appears to exhibit different geometry. All complexes showed 1:1 stoichiometry. Cefaclor reduced Cu2+ to Cu1+ that further reacted with molecular oxygen to produce hydrogen peroxide. Finally, meropenem underwent degradation in the presence of copper. The analysis of activity against Escherichia coli and Staphylococcus aureus showed that the effects of meropenem, amoxicillin, ampicillin, and ceftriaxone were significantly hindered in the presence of copper ions. The interactions with copper ions should be taken into account regarding the problem of antibiotic resistance and in the selection of the most efficient antimicrobial therapy for patients with altered copper homeostasis. © 2018 Elsevier Inc.
T2  - Free Radical Biology and Medicine
T1  - Coordination and redox interactions of β-lactam antibiotics with Cu2+ in physiological settings and the impact on antibacterial activity
VL  - 129
SP  - 279
EP  - 285
DO  - 10.1016/j.freeradbiomed.2018.09.038
ER  - 

@article{
author = "Božić, Bojana and Korać, Jelena and Stanković, Dalibor M. and Stanić, Marina and Romanović, Mima Č. and Bogdanović-Pristov, Jelena and Spasić, Snežana D. and Popović-Bijelić, Ana D. and Spasojević, Ivan and Bajčetić, Milica",
year = "2018",
abstract = "An increase in the copper pool in body fluids has been related to a number of pathological conditions, including infections. Copper ions may affect antibiotics via the formation of coordination bonds and/or redox reactions. Herein, we analyzed the interactions of Cu2+ with eight β-lactam antibiotics using UV–Vis spectrophotometry, EPR spectroscopy, and electrochemical methods. Penicillin G did not show any detectable interactions with Cu2+. Ampicillin, amoxicillin and cephalexin formed stable colored complexes with octahedral coordination environment of Cu2+ with tetragonal distortion, and primary amine group as the site of coordinate bond formation. These β-lactams increased the solubility of Cu2+ in the phosphate buffer. Ceftazidime and Cu2+ formed a complex with a similar geometry and gave rise to an organic radical. Ceftriaxone-Cu2+ complex appears to exhibit different geometry. All complexes showed 1:1 stoichiometry. Cefaclor reduced Cu2+ to Cu1+ that further reacted with molecular oxygen to produce hydrogen peroxide. Finally, meropenem underwent degradation in the presence of copper. The analysis of activity against Escherichia coli and Staphylococcus aureus showed that the effects of meropenem, amoxicillin, ampicillin, and ceftriaxone were significantly hindered in the presence of copper ions. The interactions with copper ions should be taken into account regarding the problem of antibiotic resistance and in the selection of the most efficient antimicrobial therapy for patients with altered copper homeostasis. © 2018 Elsevier Inc.",
journal = "Free Radical Biology and Medicine",
title = "Coordination and redox interactions of β-lactam antibiotics with Cu2+ in physiological settings and the impact on antibacterial activity",
volume = "129",
pages = "279-285",
doi = "10.1016/j.freeradbiomed.2018.09.038"
}

Božić, B., Korać, J., Stanković, D. M., Stanić, M., Romanović, M. Č., Bogdanović-Pristov, J., Spasić, S. D., Popović-Bijelić, A. D., Spasojević, I.,& Bajčetić, M.. (2018). Coordination and redox interactions of β-lactam antibiotics with Cu2+ in physiological settings and the impact on antibacterial activity. in Free Radical Biology and Medicine, 129, 279-285.
https://doi.org/10.1016/j.freeradbiomed.2018.09.038

Božić B, Korać J, Stanković DM, Stanić M, Romanović MČ, Bogdanović-Pristov J, Spasić SD, Popović-Bijelić AD, Spasojević I, Bajčetić M. Coordination and redox interactions of β-lactam antibiotics with Cu2+ in physiological settings and the impact on antibacterial activity. in Free Radical Biology and Medicine. 2018;129:279-285.
doi:10.1016/j.freeradbiomed.2018.09.038 .

Božić, Bojana, Korać, Jelena, Stanković, Dalibor M., Stanić, Marina, Romanović, Mima Č., Bogdanović-Pristov, Jelena, Spasić, Snežana D., Popović-Bijelić, Ana D., Spasojević, Ivan, Bajčetić, Milica, "Coordination and redox interactions of β-lactam antibiotics with Cu2+ in physiological settings and the impact on antibacterial activity" in Free Radical Biology and Medicine, 129 (2018):279-285,
https://doi.org/10.1016/j.freeradbiomed.2018.09.038 . .

TY  - JOUR
AU  - Romanović, Mima Č.
AU  - Čobeljić, Božidar R.
AU  - Pevec, Andrej
AU  - Turel, Iztok
AU  - Spasojević, Vojislav
AU  - Tsaturyan, Arshak A.
AU  - Shcherbakov, Igor N.
AU  - Anđelković, Katarina
AU  - Milenković, Marina
AU  - Radanović, Dušanka
AU  - Milenković, Milica R.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1566
AB  - A dinuclear double end-on azido bridged KM complex [Ni2L2(mu-(1),(1)-N-3)(2)(N-3)(2)] (1) with the condensation product of 2-quinolinecarboxaldehyde and trimethylammonium acetohydrazide chloride (Girards T reagent) (HLCl) has been synthesized and characterized by elemental analysis, IR spectroscopy, single-crystal X-ray diffraction, magnetic measurements and DFT studies. In complex 1 intra-dimer ferromagnetic coupling between Ni2+ ions (J= +12.0(2) cm(-1)) and inter-dimer antiferromagnetic interaction (delta = -0.8(3) cm(-1)) were observed. DFT-BS calculations provided explanation of ferromagnetic exchange coupling in complex 1. (C) 2017 Elsevier Ltd. All rights reserved.
T2  - Polyhedron
T1  - Synthesis, crystal structure, magnetic properties and DFT study of dinuclear Ni(II) complex with the condensation product of 2-quinolinecarboxaldehyde and Girards T reagent
VL  - 128
SP  - 30
EP  - 37
DO  - 10.1016/j.poly.2017.02.039
ER  - 

@article{
author = "Romanović, Mima Č. and Čobeljić, Božidar R. and Pevec, Andrej and Turel, Iztok and Spasojević, Vojislav and Tsaturyan, Arshak A. and Shcherbakov, Igor N. and Anđelković, Katarina and Milenković, Marina and Radanović, Dušanka and Milenković, Milica R.",
year = "2017",
abstract = "A dinuclear double end-on azido bridged KM complex [Ni2L2(mu-(1),(1)-N-3)(2)(N-3)(2)] (1) with the condensation product of 2-quinolinecarboxaldehyde and trimethylammonium acetohydrazide chloride (Girards T reagent) (HLCl) has been synthesized and characterized by elemental analysis, IR spectroscopy, single-crystal X-ray diffraction, magnetic measurements and DFT studies. In complex 1 intra-dimer ferromagnetic coupling between Ni2+ ions (J= +12.0(2) cm(-1)) and inter-dimer antiferromagnetic interaction (delta = -0.8(3) cm(-1)) were observed. DFT-BS calculations provided explanation of ferromagnetic exchange coupling in complex 1. (C) 2017 Elsevier Ltd. All rights reserved.",
journal = "Polyhedron",
title = "Synthesis, crystal structure, magnetic properties and DFT study of dinuclear Ni(II) complex with the condensation product of 2-quinolinecarboxaldehyde and Girards T reagent",
volume = "128",
pages = "30-37",
doi = "10.1016/j.poly.2017.02.039"
}

Romanović, M. Č., Čobeljić, B. R., Pevec, A., Turel, I., Spasojević, V., Tsaturyan, A. A., Shcherbakov, I. N., Anđelković, K., Milenković, M., Radanović, D.,& Milenković, M. R.. (2017). Synthesis, crystal structure, magnetic properties and DFT study of dinuclear Ni(II) complex with the condensation product of 2-quinolinecarboxaldehyde and Girards T reagent. in Polyhedron, 128, 30-37.
https://doi.org/10.1016/j.poly.2017.02.039

Romanović MČ, Čobeljić BR, Pevec A, Turel I, Spasojević V, Tsaturyan AA, Shcherbakov IN, Anđelković K, Milenković M, Radanović D, Milenković MR. Synthesis, crystal structure, magnetic properties and DFT study of dinuclear Ni(II) complex with the condensation product of 2-quinolinecarboxaldehyde and Girards T reagent. in Polyhedron. 2017;128:30-37.
doi:10.1016/j.poly.2017.02.039 .

Romanović, Mima Č., Čobeljić, Božidar R., Pevec, Andrej, Turel, Iztok, Spasojević, Vojislav, Tsaturyan, Arshak A., Shcherbakov, Igor N., Anđelković, Katarina, Milenković, Marina, Radanović, Dušanka, Milenković, Milica R., "Synthesis, crystal structure, magnetic properties and DFT study of dinuclear Ni(II) complex with the condensation product of 2-quinolinecarboxaldehyde and Girards T reagent" in Polyhedron, 128 (2017):30-37,
https://doi.org/10.1016/j.poly.2017.02.039 . .