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Selaković S, Rodić MV, Novaković I, Matić IZ, Stanojković T, Pirković A, Živković L, Spremo-Potparević B, Milčić M, Medaković V, Dimiza F, Psomas G, Anđelković K, Šumar-Ristović M. Cu(II) complexes with a salicylaldehyde derivative and α-diimines as co-ligands: synthesis, characterization, biological activity. Experimental and theoretical approach. Dalton Trans 2024; 53:2770-2788. [PMID: 38226867 DOI: 10.1039/d3dt03862a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2024]
Abstract
Copper(II) complexes with an α-diimine show a wide variety of biological activities, such as antibacterial, antifungal, antioxidant and anticancer. In this work, we synthesized and structurally characterized two novel Cu(II) complexes with methyl 3-formyl-4-hydroxybenzoate (HL) and α-diimines: 2,2'-bipyridine (bipy) and 1,10-phenanthroline (phen). Crystal structure analysis shows that the formulas of the compounds are [Cu(bipy)(L)(BF4)] (1) and [Cu(phen)(L)(H2O)](BF4)·H2O (2), with BF4- as a ligand in complex 1, which is rarely coordinated to metals. Both complexes have a square pyramidal geometry, while DFT calculations showed that the most stable structures of complexes 1 and 2 in a water/DMSO mixture are square-planar derivatives [Cu(bipy)(L)]+ and [Cu(phen)(L)]+. The antibacterial activity of compounds was evaluated in vitro on four Gram-negative and four Gram-positive bacterial strains. Complex 2 showed greater antibacterial activity towards all bacterial strains comparable to the control compound Amikacin. Complex 2 exerted a strong cytotoxic effect against the tested cancer cell lines (IC50 values ranging from 0.32 to 0.44 μM). Both complexes caused apoptotic cell death in HeLa cells and a noticeable in vitro antiangiogenic effect. In the concentration range of 5 to 100 μM, the complexes showed the absence of a genotoxic effect and displayed a protective effect against oxidative DNA damage induced by H2O2 in human peripheral blood cells. The interaction between the compounds and calf-thymus DNA was evaluated by diverse techniques suggesting a tight binding, which was also confirmed by molecular docking. In addition, it was found that the complexes bind tightly and reversibly to bovine and human serum albumin.
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Affiliation(s)
- Snežana Selaković
- University of Belgrade - Faculty of Pharmacy, Department of General and Inorganic Chemistry, 11000 Belgrade, Serbia
| | - Marko V Rodić
- University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, 21102 Novi Sad, Serbia
| | - Irena Novaković
- University of Belgrade, Institute of Chemistry, Technology and Metallurgy, Department of Chemistry, 11000 Belgrade, Serbia
| | - Ivana Z Matić
- Institute of Oncology and Radiology of Serbia, Belgrade, Serbia
| | | | - Andrea Pirković
- Institute for the Application of Nuclear Energy-INEP, Department for Biology of Reproduction, Serbia
| | - Lada Živković
- University of Belgrade - Faculty of Pharmacy, Department of Pathobiology, 11000 Belgrade, Serbia
| | | | - Miloš Milčić
- University of Belgrade - Faculty of Chemistry, 11000 Belgrade, Serbia.
| | - Vesna Medaković
- University of Belgrade - Faculty of Chemistry, 11000 Belgrade, Serbia.
| | - Filitsa Dimiza
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki GR-54124, Greece
| | - George Psomas
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki GR-54124, Greece
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Ziółkowska A, Witwicki M. Understanding the Exchange Interaction between Paramagnetic Metal Ions and Radical Ligands: DFT and Ab Initio Study on Semiquinonato Cu(II) Complexes. Int J Mol Sci 2023; 24:ijms24044001. [PMID: 36835412 PMCID: PMC9959031 DOI: 10.3390/ijms24044001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 02/10/2023] [Accepted: 02/13/2023] [Indexed: 02/18/2023] Open
Abstract
The exchange coupling, represented by the J parameter, is of tremendous importance in understanding the reactivity and magnetic behavior of open-shell molecular systems. In the past, it was the subject of theoretical investigations, but these studies are mostly limited to the interaction between metallic centers. The exchange coupling between paramagnetic metal ions and radical ligands has hitherto received scant attention in theoretical studies, and thus the understanding of the factors governing this interaction is lacking. In this paper, we use DFT, CASSCF, CASSCF/NEVPT2, and DDCI3 methods to provide insight into exchange interaction in semiquinonato copper(II) complexes. Our primary objective is to identify structural features that affect this magnetic interaction. We demonstrate that the magnetic character of Cu(II)-semiquinone complexes are mainly determined by the relative position of the semiquinone ligand to the Cu(II) ion. The results can support the experimental interpretation of magnetic data for similar systems and can be used for the in-silico design of magnetic complexes with radical ligands.
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Affiliation(s)
- Aleksandra Ziółkowska
- Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, Poland
| | - Maciej Witwicki
- Faculty of Chemistry, Wroclaw University, F. Joliot-Curie 14, 50-283 Wroclaw, Poland
- Correspondence:
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Martyanov K, Kuropatov V, Rumyantcev R, Cherkasov V. Metallocomplexes, exhibiting catecholate binding mode for o-quinone, annulated with dithiete cycle. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2021.120604] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Synthesis and Characterization of Catecholato Copper(II) Complexes with Sterically Hindered Neutral and Anionic N3 Type Ligands: Tris(3,5-diisopropyl-1-pyrazolyl)methane and Hydrotris(3,5-diisopropyl-1-pyrazolyl)borate. INORGANICS 2020. [DOI: 10.3390/inorganics8050037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Three catecholato copper(II) complexes, [Cu(catCl4)(L1′)], [Cu(catBr4)(L1′)], and [Cu(catCl4)(L1H)], supported by sterically hindered neutral and anionic N3 type ligands: tris(3,5-diisopropyl-1-pyrazolyl)methane (referred to as L1′) and hydrotris(3,5-diisopropyl-1-pyrazolyl)borate (referred to as L1−), are synthesized and characterized in detail. Their X-ray structures reveal that both [Cu(catCl4)(L1′)] and [Cu(catBr4)(L1′)] complexes have a five-coordinate square-pyramidal geometry and [Cu(catCl4)(L1H)] complex has a four-coordinate square-planar geometry. The L1H is unusual protonated ligand that controls its overall charge. For the three catecholato copper(II) complexes, the oxidation state of copper is divalent, and catechol exists in catecholate as two minus anion. This difference in coordination geometry affects their d-d and CT transitions energy and ESR parameters.
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Sinitsa DK, Sukhikh TS, Petrov PA, Nadolinny VA, Konchenko SN, Pushkarevsky NA. Structural Diversity of Calcium, Strontium, and Barium Complexes with Reduced Forms of the 3,6‐Di‐
tert
‐butyl‐o‐benzoquinone Ligand. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900678] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Dmitry K. Sinitsa
- Nikolaev Institut of Inorganic Chemistry SB RAS Akademika Lavrentieva ave. 3 630090 Novosibirsk Russia
- Department of Natural Sciences Novosibirsk State University Pirogova st. 1 630090 Novosibirsk Russia
| | - Taisiya S. Sukhikh
- Nikolaev Institut of Inorganic Chemistry SB RAS Akademika Lavrentieva ave. 3 630090 Novosibirsk Russia
- Department of Natural Sciences Novosibirsk State University Pirogova st. 1 630090 Novosibirsk Russia
| | - Pavel A. Petrov
- Nikolaev Institut of Inorganic Chemistry SB RAS Akademika Lavrentieva ave. 3 630090 Novosibirsk Russia
- Department of Natural Sciences Novosibirsk State University Pirogova st. 1 630090 Novosibirsk Russia
| | - Vladimir A. Nadolinny
- Nikolaev Institut of Inorganic Chemistry SB RAS Akademika Lavrentieva ave. 3 630090 Novosibirsk Russia
| | - Sergey N. Konchenko
- Nikolaev Institut of Inorganic Chemistry SB RAS Akademika Lavrentieva ave. 3 630090 Novosibirsk Russia
- Department of Natural Sciences Novosibirsk State University Pirogova st. 1 630090 Novosibirsk Russia
| | - Nikolay A. Pushkarevsky
- Nikolaev Institut of Inorganic Chemistry SB RAS Akademika Lavrentieva ave. 3 630090 Novosibirsk Russia
- Department of Natural Sciences Novosibirsk State University Pirogova st. 1 630090 Novosibirsk Russia
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Cherkasova AV, Kozhanov KA, Zolotukhin AA, Bogomyakov AS, Cherkasov AV, Cherkasov VK. Heterospin Copper(II) Catecholate Complex with the TEMPO–Iminopyridine Ligand. RUSS J COORD CHEM+ 2019. [DOI: 10.1134/s1070328419070029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Bubnov MP, Cherkasov VK, Teplova IA, Druzhkov NO, Grishin ID, Baranov EV, Bogomyakov AS, Abakumov GA. Novel dioxolene nickel complexes with sterically hindered diazabutadienes. Coupling of aza-ligands coordinated to nickel. Dalton Trans 2019; 48:10516-10525. [DOI: 10.1039/c9dt01309a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Coupling of nickel complexes containing N,N′-disubstituted-2,3-dimethyl-1,4-diazabutadiene-1,3 occurs through the methyl group of the latter in nonpolar media in the presence of free o-quinone.
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Affiliation(s)
- Michael P. Bubnov
- G. A. Razuvaev Institute of Organometallic Chemistry of RAS
- 603950 Nizhniy Novgorod
- Russia
| | - Vladimir K. Cherkasov
- G. A. Razuvaev Institute of Organometallic Chemistry of RAS
- 603950 Nizhniy Novgorod
- Russia
| | - Irina A. Teplova
- G. A. Razuvaev Institute of Organometallic Chemistry of RAS
- 603950 Nizhniy Novgorod
- Russia
| | - Nickolay O. Druzhkov
- G. A. Razuvaev Institute of Organometallic Chemistry of RAS
- 603950 Nizhniy Novgorod
- Russia
| | - Ivan D. Grishin
- Lobachevsky State University of Nizhniy Novgorod
- Nizhniy Novgorod
- Russia
| | - Evgenii V. Baranov
- G. A. Razuvaev Institute of Organometallic Chemistry of RAS
- 603950 Nizhniy Novgorod
- Russia
| | - Artem S. Bogomyakov
- The International Tomography Center of the SB of RAS
- Novosibirsk 630090
- Russia
| | - Gleb. A. Abakumov
- G. A. Razuvaev Institute of Organometallic Chemistry of RAS
- 603950 Nizhniy Novgorod
- Russia
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