1
|
Novel cobalt complexes of pyridine-based NNS donor thiosemicarbazones: Synthesis, X-ray characterization, DFT calculations, Hirshfeld surface analysis, and molecular docking study. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
|
2
|
Coordination preferences of NNO and NNS Schiff base ligands with Co(III) complexes: Synthesis, characterization and DFT calculation. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
3
|
Synthesis, Structures, and Photoluminescence of Two Novel Zinc(II) Compounds Containing 2-Acetylpyridine-aminoguanidine. INORGANICS 2022. [DOI: 10.3390/inorganics10100147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In the reaction of zinc(II) sulfate and the chloride salt of 2-acetylpyridine-aminoguanidine, two types of complex were obtained, i.e., [Zn(H2O)6](H2L)2(SO4)3·3H2O and [Zn(L)H2O(SO4)]·H2O, depending on the presence of LiOAc as the deprotonating agent. The physicochemical, structural, and photoluminescence properties of the complexes were examined. In the first complex, obtained in the absence of LiOAc, the Schiff base had the role of a counter-ion in its doubly protonated form, while in the presence of LiOAc, upon deprotonation, coordination takes place, and thus the Schiff base acts as a tridentate N3 ligand. In the latter complex, the ligand is coordinated through pyridine, azomethine, and the imino nitrogen of the aminoguanidine residue, leading to formation of two fused five-membered chelate rings. Both the examined complexes, as well as the ligand itself, show high photoluminescence.
Collapse
|
4
|
de Almeida PS, Pereira TM, Kummerle AE, Guedes GP, Silva H, de Oliveira LL, Neves AP. New Ru(II)–DMSO complexes containing coumarin-N-acylhydrazone hybrids: Synthesis, X-ray structures, cytotoxicity and antimicrobial activities. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.06.053] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
5
|
Areas ES, de Assunção Paiva JL, Ribeiro FV, Pereira TM, Kummerle AE, Silva H, Guedes GP, Cellis do Nascimento AC, da Silva Miranda F, Neves AP. Redox-Activated Drug Delivery Properties and Cytotoxicity of Cobalt Complexes Based on a Fluorescent Coumarin-β-Keto Ester Hybrid. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900734] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Esther Saraiva Areas
- Instituto de Química; Universidade Federal Rural do Rio de Janeiro; BR-465, Km 7 Seropédica CEP 23890-000 Rio de Janeiro Brasil
| | | | - Felipe Vitório Ribeiro
- Instituto de Química; Universidade Federal Rural do Rio de Janeiro; BR-465, Km 7 Seropédica CEP 23890-000 Rio de Janeiro Brasil
| | - Thiago Moreira Pereira
- Instituto de Química; Universidade Federal Rural do Rio de Janeiro; BR-465, Km 7 Seropédica CEP 23890-000 Rio de Janeiro Brasil
| | - Arthur Eugen Kummerle
- Instituto de Química; Universidade Federal Rural do Rio de Janeiro; BR-465, Km 7 Seropédica CEP 23890-000 Rio de Janeiro Brasil
| | - Heveline Silva
- Departamento de Química; Universidade Federal de Minas Gerais; Av. Antônio Carlos, 6627 - Pampulha Belo Horizonte Minas Gerais CEP 31270-901 Brasil
| | - Guilherme Pereira Guedes
- Instituto de Química; Universidade Federal Fluminense; Campus do Valonguinho, Centro, Niterói Rio de Janeiro CEP 24020-150 Brasil
| | | | - Fabio da Silva Miranda
- Instituto de Química; Universidade Federal Fluminense; Campus do Valonguinho, Centro, Niterói Rio de Janeiro CEP 24020-150 Brasil
| | - Amanda Porto Neves
- Instituto de Química; Universidade Federal Rural do Rio de Janeiro; BR-465, Km 7 Seropédica CEP 23890-000 Rio de Janeiro Brasil
| |
Collapse
|
6
|
King AP, Gellineau HA, MacMillan SN, Wilson JJ. Physical properties, ligand substitution reactions, and biological activity of Co(iii)-Schiff base complexes. Dalton Trans 2019; 48:5987-6002. [PMID: 30672949 PMCID: PMC6504617 DOI: 10.1039/c8dt04606a] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Four cobalt(iii) complexes of the general formula [Co(Schiff base)(L)2]+, where L is ammonia (NH3) or 3-fluorobenzylamine (3F-BnNH2), were synthesized. The complexes were characterized by NMR spectroscopy, mass spectrometry, and X-ray crystallography. Their electrochemical properties, ligand substitution mechanisms, and ligand exchange rates in aqueous buffer were investigated. These physical properties were correlated to the cellular uptake and anticancer activities of the complexes. The complexes undergo sequential, dissociative ligand substitution, with the exchange rates depending heavily on the axial ligands. Eyring analyses revealed that the relative ligand exchange rates were largely impacted by differences in the entropy, rather than enthalpy, of activation for the complexes. Performing the substitution reactions in the presence of ascorbate led to a change in the reaction profile and kinetics, but no change in the final product. The cytotoxic activity of the complexes correlates with both the ligand exchange rate and reduction potential, with the more easily reduced and rapidly substituted complexes showing higher toxicity. These relationships may be valuable for the rational design of Co(iii) complexes as anticancer or antiviral prodrugs.
Collapse
Affiliation(s)
- A Paden King
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA.
| | | | | | | |
Collapse
|
7
|
Investigation on the cytotoxic effects of nitrogen-mustard-derived Schiff bases. Studies on the reactivity of the N-mustard pharmacophoric group. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.10.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
|
8
|
Khajehzadeh M, Rajabi M, Rahmaniasl S. Synthesis, spectroscopic (UV–vis, FT-IR and NMR), solubility in various solvents, X–ray, NBO, NLO and FMO analysis of (L1) and [(L1)PdCl2] complex: A comprehensive experimental and computational study. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.07.084] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
9
|
Yu H, Guo S, Cheng JY, Jiang G, Li Z, Zhai W, Li A, Jiang Y, You Z. Synthesis and crystal structures of cobalt(III), copper(II), nickel(II) and zinc(II) complexes derived from 4-methoxy-N′-(pyridin-2-ylmethylene)benzohydrazide with urease inhibitory activity. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1533959] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Huiyuan Yu
- Department of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, P. R. China
| | - Sihan Guo
- Department of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, P. R. China
| | - Jun-Yan Cheng
- College of Chemistry, Chemical Engineering and Material Science, Shandong Normal University, Jinan, P. R. China
| | - Guifa Jiang
- Department of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, P. R. China
| | - Zhiwen Li
- Department of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, P. R. China
| | - Wenqi Zhai
- Department of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, P. R. China
| | - Ang Li
- Department of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, P. R. China
| | - Yumin Jiang
- Department of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, P. R. China
| | - Zhonglu You
- Department of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, P. R. China
| |
Collapse
|
10
|
Synthesis, characterization and antimicrobial activities of Co(III) and Ni(II) complexes with 5-methyl-3-formylpyrazole-N(4)-dihexylthiosemicarbazone (HMPzNHex2): X-ray crystallography and DFT calculations of [Co(MPzNHex2)2]ClO4·1.5H2O (I) and [Ni(HMPzNHex2)2]Cl2·2H2O (II). Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.08.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
11
|
Radanović MM, Rodić MV, Vojinović-Ješić LS, Armaković S, Armaković SJ, Leovac VM. Complexes of Zn(II) and Cd(II) with 2-acetylpyridine -aminoguanidine – Syntheses, structures and DFT calculations. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.12.038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
12
|
Zhang C, Sutherland M, Herasymchuk K, Clarke RM, Thompson JR, Chiang L, Walsby CJ, Storr T. Octahedral Co(III) salen complexes: the role of peripheral ligand electronics on axial ligand release upon reduction. CAN J CHEM 2018. [DOI: 10.1139/cjc-2017-0277] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A series of octahedral CoIII salen complexes (where salen represents a N2O2 bis-Schiff-base bis-phenolate framework) were prepared with axial imidazole ligating groups. When using 1-methylimidazole (1-MeIm) axial ligands, the CoIII/CoII reduction potential could be altered by 220 mV via variation of the electron-donating ability of the para-ring substituents (R = H (1), OMe (2), tBu (3), Br (4), NO2 (5), and CF3 (6)). In addition, the irreversibility of the reduction process suggested substantial geometrical changes and axial ligand exchange upon reduction to the more labile CoII oxidation state. Installing an imidazole-coumarin conjugate as the axial ligands resulted in fluorescence quenching when bound to the CoIII centre (R = H (7), OMe (8), and CF3 (9)). The redox properties and fluorescence increase upon ligand release for 7–9 were studied under reducing conditions and in the presence of excess competing ligand (1-MeIm). It was determined that the Lewis acidity of the CoIII centre was the dominant factor in controlling axial ligand exchange for this series of complexes.
Collapse
Affiliation(s)
- Chen Zhang
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - Mathew Sutherland
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - Khrystyna Herasymchuk
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - Ryan M. Clarke
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - John R. Thompson
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - Linus Chiang
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - Charles J. Walsby
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - Tim Storr
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| |
Collapse
|
13
|
Magyari J, Barta Holló B, Vojinović-Ješić LS, Radanović MM, Armaković S, Armaković SJ, Molnár J, Kincses A, Gajdács M, Spengler G, Mészáros Szécsényi K. Interactions of Schiff base compounds and their coordination complexes with the drug cisplatin. NEW J CHEM 2018. [DOI: 10.1039/c8nj00357b] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
There is a complex interplay between the structural and other physicochemical properties of new compounds and the molecules in living organisms.
Collapse
|
14
|
Areas ES, Bronsato BJDS, Pereira TM, Guedes GP, Miranda FDS, Kümmerle AE, da Cruz AGB, Neves AP. Novel Co III complexes containing fluorescent coumarin-N-acylhydrazone hybrid ligands: Synthesis, crystal structures, solution studies and DFT calculations. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 187:130-142. [PMID: 28683368 DOI: 10.1016/j.saa.2017.06.031] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2017] [Revised: 06/05/2017] [Accepted: 06/24/2017] [Indexed: 06/07/2023]
Abstract
A series of new CoIII complexes of the type [Co(dien)(L1-L3)]ClO4 (1-3), containing fluorescent coumarin-N-acylhydrazonate hybrid ligands, (E)-N'-(1-(7-oxido-2-oxo-2H-chromen-3-yl)ethylidene)-4-R-benzohydrazonate [where R=H (L12-), OCH3 (L22-) or Cl (L32-)], were obtained and isolated in the low spin CoIII configuration. Single-crystal X-ray diffraction showed that the coumarin-N-acylhydrazones act as tridentate ligands in their deprotonated form (L2-). The cation (+1) complexes contain a diethylenetriamine (dien) as auxiliary ligand and their structures were calculated by DFT studies which were also performed for the CoII (S=1/2 and S=3/2) configurations. The LS CoII (S=1/2) concentrated the spin density on the O-Co-O axis while the HS CoII (S=3/2) exhibited a broad spin density distribution around the metallic center. Cyclic voltammetry studies showed that structural modifications made in the L2- ligands caused a slight influence on the electronic density of the metal center, and the E1/2 values for the CoIII/CoII redox couple increased following the electronic effect of the R-substituent, in the order: 2 (R=OCH3)<1 (R=H)<3 (R=Cl). The theoretical redox potentials (E°) of the process CoIII→CoII were calculated for both CoII spin states (S=1/2 and S=3/2) and a better correlation was found for CoIII→CoII (S=1/2), compared with experimental values vs SHE (E°calc=-0.37, -0.36 and -0.32V vs E°exp.=-0.371, -0.406 and -0.358V, for 1-3 respectively). Complexes 1-3 exhibited a very intense absorption band around 470nm, assigned by DFT calculations as π-π* transitions from the delocalized coumarin-N-acylhydrazone system. 1-3 were very stable in MeOH for several days. Likewise, 1-3 were stable in phosphate buffer containing sodium ascorbate after 15h, which was attributed to the high chelate effect and σ-donor ability of the L2- and dien ligands.
Collapse
Affiliation(s)
- Esther S Areas
- Departamento de Química, Universidade Federal Rural do Rio de Janeiro, Campus de Seropédica, BR-465 Km 7, 23890-000, Seropédica, RJ, Brazil
| | - Bruna Juliana da S Bronsato
- Departamento de Química, Universidade Federal Rural do Rio de Janeiro, Campus de Seropédica, BR-465 Km 7, 23890-000, Seropédica, RJ, Brazil
| | - Thiago M Pereira
- Departamento de Química, Universidade Federal Rural do Rio de Janeiro, Campus de Seropédica, BR-465 Km 7, 23890-000, Seropédica, RJ, Brazil
| | - Guilherme P Guedes
- Departamento de Química, Universidade Federal Rural do Rio de Janeiro, Campus de Seropédica, BR-465 Km 7, 23890-000, Seropédica, RJ, Brazil
| | - Fábio da S Miranda
- Instituto de Química, Universidade Federal Fluminense, 24020-150 Niterói, RJ, Brazil
| | - Arthur E Kümmerle
- Departamento de Química, Universidade Federal Rural do Rio de Janeiro, Campus de Seropédica, BR-465 Km 7, 23890-000, Seropédica, RJ, Brazil
| | - Antônio G B da Cruz
- Departamento de Química, Universidade Federal Rural do Rio de Janeiro, Campus de Seropédica, BR-465 Km 7, 23890-000, Seropédica, RJ, Brazil
| | - Amanda P Neves
- Departamento de Química, Universidade Federal Rural do Rio de Janeiro, Campus de Seropédica, BR-465 Km 7, 23890-000, Seropédica, RJ, Brazil.
| |
Collapse
|
15
|
Indium(III) complexes with 2-acetylpyridine-derived thiosemicarbazones exhibit cytotoxic activity against human leukemia and solid tumor cell lines. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.06.045] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
16
|
Ghosh K, Harms K, Chattopadhyay S. Two Cobalt(III) Schiff Base Complexes of the Type [Co(ABC)(DE)X]: Facile Synthesis, Characterization, Catechol Oxidase and Phenoxazinone Synthase Mimicking Activity. ChemistrySelect 2017. [DOI: 10.1002/slct.201701536] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kousik Ghosh
- Department of Chemistry, Inorganic Section; Jadavpur University; Kolkata 700 032 India
| | - Klaus Harms
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Strasse D-35032 Marburg Germany
| | - Shouvik Chattopadhyay
- Department of Chemistry, Inorganic Section; Jadavpur University; Kolkata 700 032 India
| |
Collapse
|
17
|
King AP, Gellineau HA, Ahn JE, MacMillan SN, Wilson JJ. Bis(thiosemicarbazone) Complexes of Cobalt(III). Synthesis, Characterization, and Anticancer Potential. Inorg Chem 2017; 56:6609-6623. [PMID: 28509538 PMCID: PMC8113979 DOI: 10.1021/acs.inorgchem.7b00710] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Nine bis(thiosemicarbazone) (BTSC) cobalt(III) complexes of the general formula [Co(BTSC)(L)2]NO3 were synthesized, where BTSC = diacetyl bis(thiosemicarbazone) (ATS), pyruvaldehyde bis(thiosemicarbazone) (PTS), or glyoxal bis(thiosemicarbazone) (GTS) and L = ammonia, imidazole (Im), or benzylamine (BnA). These compounds were characterized by multinuclear NMR spectroscopy, mass spectrometry, cyclic voltammetry, and X-ray crystallography. Their stability in phosphate-buffered saline was investigated and found to be highly dependent on the nature of the axial ligand, L. These studies revealed that complex stability is primarily dictated by the axial ligand following the sequence NH3 > Im > BnA. The cellular uptake and cytotoxicity in cancer cells were also determined. Both the cellular uptake and cytotoxicity were significantly affected by the nature of the equatorial BTSC. Complexes of ATS were taken up much more effectively than those of PTS and GTS. The cytotoxicity of the complexes was correlated to that of the free ligand. Cell uptake and cytotoxicity were also determined under hypoxic conditions. Only minor differences in the hypoxia activity and uptake were observed. Treatment of the cancer cells with the copper-depleting agent tetrathiomolybdate decreased the cytotoxic potency of the complexes, indicating that they may operate via a copper-dependent mechanism. These results provide a structure-activity relationship for this class of compounds, which may be applied for the rational design of new cobalt(III) anticancer agents.
Collapse
Affiliation(s)
- A. Paden King
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, United States
| | - Hendryck A. Gellineau
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, United States
| | - Jung-Eun Ahn
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, United States
| | - Samantha N. MacMillan
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, United States
| | - Justin J. Wilson
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, United States
| |
Collapse
|