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102
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Maria Kulandai Raja Balan A, Francis Nicholas Ashok R, Vasanthi M, Prabu R, Paulraj A. Synthesis, characterization, crystal structure and biological studies on nicotinanilide based nickel(II), copper(II) and zinc(II) complexes. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2013.08.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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103
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Salehi M, Kubicki M, Dutkiewicz G, Rezaei A, Behzad M, Etminani S. Synthesis, characterization, electrochemical studies, and antibacterial activities of cobalt(III) complexes with Salpn-Tipe Schiff base ligands. Crystal structure of trans-[CoIII(L1)(Py)2]ClO4. RUSS J COORD CHEM+ 2013. [DOI: 10.1134/s1070328413100084] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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104
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Sanatkar TH, Hadadzadeh H, Simpson J, Jannesari Z. The meloxicam complexes of Co(II) and Zn(II): Synthesis, crystal structures, photocleavage and in vitro DNA-binding. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.06.070] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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105
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Ramadan RM, Abdel-Rahman LH, Ismael M, Youssef TA, Ali SA. Synthesis and spectroscopic studies of some chromium and molybdenum derivatives of bis-(acetylacetone)ethylenediimine ligand. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.06.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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106
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Naeimi H, Barzoky MN. Efficient, Convenient and Mild Three-Component Template Preparation and Characterization of Some New Schiff Base Complexes. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200800128] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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107
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Wang ZC, Chu J, Zhan SZ. {2,2'-[(1,2-Di-cyano-ethene-1,2-di-yl)bis-(nitrilo-methanylyl-idyne)]diphenolato-κ(4) O,N,N',O'}(methanol-κO)zinc. Acta Crystallogr Sect E Struct Rep Online 2013; 69:m419. [PMID: 24046585 PMCID: PMC3772442 DOI: 10.1107/s1600536813016863] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Accepted: 06/18/2013] [Indexed: 11/10/2022]
Abstract
In the title complex, [Zn(C18H10N4O2)(CH4O)], the Zn(2+) cation is located on a mirror plane and is coordinated by a tetradentate Schiff base ligand anion (L (2-)) and a methanol mol-ecule. The Zn(2+) cation is surrounded by two N atoms and two O atoms from L (2-), in a nearly planar configuration, and one methanol O atom, forming a slightly distorted square-pyramidal geometry. The methanol molecule is disordered over two sets of sites in a 0.5:0.5 ratio. In the crystal, O-H⋯O hydrogen bonds link the mol-ecules into chains parallel to [001].
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Affiliation(s)
- Zhi-Chun Wang
- College of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China
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108
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Peterson MD, Holbrook RJ, Meade TJ, Weiss EA. Photoinduced electron transfer from PbS quantum dots to cobalt(III) Schiff base complexes: light activation of a protein inhibitor. J Am Chem Soc 2013; 135:13162-7. [PMID: 23931454 DOI: 10.1021/ja4065393] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This paper describes the activation of a biologically inert Co(III) Schiff base [Co(III)-SB] complex to its protein inhibitor form by photoinduced electron transfer (PET) from a colloidal PbS quantum dot (QD, radii of 1.5-1.7 nm) to the cobalt center, with a charge separation time constant of 125 ns. Reduction of the Co(III)-SB complex initiates release of the native axial ligands, promoting replacement with the histidine mimic 4-methylimidazole. The rate of ligand displacement increases by a factor of approximately 8 upon exposure of the PbS QD/Co(III)-SB mixture to light with an energy greater than the energy of the first excitonic state of the QDs, from which PET occurs. These results suggest an approach for the preparation of inorganic therapeutic agents that can be specifically coupled to a biologically active site by cooperative redox binding ligation.
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Affiliation(s)
- Mark D Peterson
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
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109
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Fadaee F, Amirnasr M, Amirnasr A, Mereiter K, Schenk-Joß K. Synthesis, structural characterization, and antibacterial activity of mononuclear cobalt(III) azido complexes of two pentadentate Schiff bases derived from 2-hydroxynaphthaldehyde. J COORD CHEM 2013. [DOI: 10.1080/00958972.2013.781159] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Farzaneh Fadaee
- a Department of Chemistry , Isfahan University of Technology , Isfahan , Iran
- d CCC-IPSB, École Polytechnique Fédérale de Lausanne, BSP Dorigny , Lausanne , Switzerland
| | - Mehdi Amirnasr
- a Department of Chemistry , Isfahan University of Technology , Isfahan , Iran
| | - Azadeh Amirnasr
- b Faculty of Science, Department of Biology , University of Isfahan , Isfahan , Iran
| | - Kurt Mereiter
- c Faculty of Chemistry , Vienna University of Technology , Vienna , Austria
| | - Kurt Schenk-Joß
- d CCC-IPSB, École Polytechnique Fédérale de Lausanne, BSP Dorigny , Lausanne , Switzerland
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110
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Matosziuk LM, Holbrook RJ, Manus LM, Heffern MC, Ratner MA, Meade TJ. Rational design of [Co(acacen)L2]+ inhibitors of protein function. Dalton Trans 2013; 42:4002-12. [PMID: 23340849 PMCID: PMC3581327 DOI: 10.1039/c2dt32565a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Cobalt(III) Schiff base complexes, such as [Co(acacen)L(2)](+), inhibit the function of Zn(II)-dependent proteins through dissociative exchange of the axial ligands with key histidine residues of the target protein. Consequently the efficacy of these compounds depends strongly on the lability of the axial ligands. A series of [Co(acacen)L(2)](+) complexes with various axial ligands was investigated using DFT to determine the kinetics and thermodynamics of ligand exchange and hydrolysis. Results showed excellent agreement with experimental data, indicating that axial ligand lability is determined by several factors: pK(a) of the axial ligand, the kinetic barrier to ligand dissociation, and the relative thermodynamic stability of the complexes before and after exchange. Hammett plots were constructed to determine if the kinetics and thermodynamics of exchange can be modulated by the addition of an electron-withdrawing group (EWG) to either the axial ligand itself or to the equatorial acacen ligand. Results predict that addition of an EWG to the axial ligand will shift the kinetics and thermodynamics so as to promote axial ligand exchange, while addition of an EWG to acacen will decrease axial ligand lability. These investigations will aid in the design of the next generation of [Co(acacen)L(2)](2+), allowing researchers to develop new, more effective inhibitors.
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Affiliation(s)
- Lauren M. Matosziuk
- Departments of Chemistry, Molecular Biosciences, Neurobiology, Biomedical Engineering, and Radiology, Northwestern University, Evanston, Illinois 60208-3113
| | - Robert J. Holbrook
- Departments of Chemistry, Molecular Biosciences, Neurobiology, Biomedical Engineering, and Radiology, Northwestern University, Evanston, Illinois 60208-3113
| | - Lisa M. Manus
- Departments of Chemistry, Molecular Biosciences, Neurobiology, Biomedical Engineering, and Radiology, Northwestern University, Evanston, Illinois 60208-3113
| | - Marie C. Heffern
- Departments of Chemistry, Molecular Biosciences, Neurobiology, Biomedical Engineering, and Radiology, Northwestern University, Evanston, Illinois 60208-3113
| | - Mark A. Ratner
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113
| | - Thomas J. Meade
- Departments of Chemistry, Molecular Biosciences, Neurobiology, Biomedical Engineering, and Radiology, Northwestern University, Evanston, Illinois 60208-3113
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111
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Kianfar AH, Ramazani S, Fath RH, Roushani M. Synthesis, spectroscopy, electrochemistry and thermogravimetry of copper(II) tridentate Schiff base complexes, theoretical study of the structures of compounds and kinetic study of the tautomerism reactions by ab initio calculations. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 105:374-382. [PMID: 23333691 DOI: 10.1016/j.saa.2012.12.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2012] [Revised: 12/02/2012] [Accepted: 12/06/2012] [Indexed: 06/01/2023]
Abstract
Attempts to spectroscopic and structural study of copper complexes, some Cu(II) Schiff base complexes were synthesized and characterized by means of electronic, IR, (1)HNMR spectra and elemental analysis. The thermal analyses of the complexes were investigated and the first order kinetic parameters were derived for them. The cyclic voltammetric studies in acetonitrile were proposed a monomeric structure for complexes. The structures of compounds were determined by ab initio calculations. In the solid state, the ligands exist as keto-amine/enol-imine tautomeric forms with an intramolecular hydrogen bond (N-H···O) between amine and carbonyl group. The kinetic studies of the tautomerism and equilibrium constant of the reactions were calculated using transition state theory. The optimized molecular geometry and atomic charges were calculated using MP2 method with 6-31G(d) basis set for H, C, N and O atoms and LANL2DZ for the Cu atom. The results suggested that, in the complexes, Cu(II) ion is in pseudo square-planar NO(3) coordination geometry. Also the bond lengths and angles were studied and compared.
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Affiliation(s)
- Ali Hossein Kianfar
- Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran.
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112
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Das M, Chattopadhyay S. Synthesis and structures of two cobalt(III) complexes with N4 donor ligands: Isolation of a unique bis-hemiaminal ether ligand as the metal complex. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.11.025] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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113
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Manus LM, Holbrook RJ, Atesin TA, Heffern MC, Harney AS, Eckermann AL, Meade TJ. Axial ligand exchange of N-heterocyclic cobalt(III) Schiff base complexes: molecular structure and NMR solution dynamics. Inorg Chem 2013; 52:1069-76. [PMID: 23282130 DOI: 10.1021/ic302379j] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The kinetic and thermodynamic ligand exchange dynamics are important considerations in the rational design of metal-based therapeutics and therefore, require detailed investigation. Co(III) Schiff base complex derivatives of bis(acetylacetone)ethylenediimine [acacen] have been found to be potent enzyme and transcription factor inhibitors. These complexes undergo solution exchange of labile axial ligands. Upon dissociation, Co(III) irreversibly interacts with specific histidine residues of a protein, and consequently alters structure and causes inhibition. To guide the rational design of next generation agents, understanding the mechanism and dynamics of the ligand exchange process is essential. To investigate the lability, pH stability, and axial ligand exchange of these complexes in the absence of proteins, the pD- and temperature-dependent axial ligand substitution dynamics of a series of N-heterocyclic [Co(acacen)(X)(2)](+) complexes [where X = 2-methylimidazole (2MeIm), 4-methylimidazole (4MeIm), ammine (NH(3)), N-methylimidazole (NMeIm), and pyridine (Py)] were characterized by NMR spectroscopy. The pD stability was shown to be closely related to the nature of the axial ligand with the following trend toward aquation: 2MeIm > NH(3) ≫ 4MeIm > Py > Im > NMeIm. Reaction of each [Co(III)(acacen)(X)(2)](+) derivative with 4MeIm showed formation of a mixed ligand Co(III) intermediate via a dissociative ligand exchange mechanism. The stability of the mixed ligand adduct was directly correlated to the pD-dependent stability of the starting Co(III) Schiff base with respect to [Co(acacen)(4MeIm)(2)](+). Crystal structure analysis of the [Co(acacen)(X)(2)](+) derivatives confirmed the trends in stability observed by NMR spectroscopy. Bond distances between the Co(III) and the axial nitrogen atoms were longest in the 2MeIm derivative as a result of distortion in the planar tetradentate ligand, and this was directly correlated to axial ligand lability and propensity toward exchange.
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Affiliation(s)
- Lisa M Manus
- Department of Chemistry, Molecular Biosciences, Neurobiology, Biomedical Engineering, and Radiology, Northwestern University, Evanston, Illinois 60208-3113, United States
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114
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Cobalt(III) Schiff base complexes derived from mesostilbenediamine: Synthesis, characterization, crystal structure, electrochemistry and antibacterial studies. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2012.10.030] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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115
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Psomas G, Kessissoglou DP. Quinolones and non-steroidal anti-inflammatory drugs interacting with copper(ii), nickel(ii), cobalt(ii) and zinc(ii): structural features, biological evaluation and perspectives. Dalton Trans 2013; 42:6252-76. [DOI: 10.1039/c3dt50268f] [Citation(s) in RCA: 184] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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116
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Janati Fard F, Mashhadi Khoshkhoo Z, Mirtabatabaei H, Housaindokht MR, Jalal R, Eshtiagh Hosseini H, Bozorgmehr MR, Esmaeili AA, Javan Khoshkholgh M. Synthesis, characterization and interaction of N,N'-dipyridoxyl (1,4-butanediamine) Co(III) salen complex with DNA and HSA. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 97:74-82. [PMID: 22750340 DOI: 10.1016/j.saa.2012.05.066] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Revised: 05/14/2012] [Accepted: 05/25/2012] [Indexed: 06/01/2023]
Abstract
Co(III) salen complex with N,N'-dipyridoxyl (1,4-butanediamine) Schiff-base ligand as tetradentate ligand was synthesized and characterized by the elemental and spectroscopic analysis. The interaction of this complex with calf thymus DNA (ct DNA) has been investigated in vitro using UV absorption, fluorescence spectroscopy, thermal denaturation and gel electrophoresis techniques. The binding constant has been estimated to be 1×10(4)M(-1) using UV absorption. The addition of ct DNA to Co(III) salen solution resulted in a fluorescence quenching. The binding constant and site size binding have been calculated in connection with other experimental observations show that the interactive model between Co(III) salen and ct DNA is an intercalative one. The interaction between plasmid DNA (pTZ57R DNA) and this complex is confirmed by gel electrophoresis studies. Furthermore, the interaction between HSA and Co(III) salen complex was investigated by UV absorption, fluorescence spectroscopy and molecular modeling. The binding constant for the interaction of this complex with HSA were found to be 3.854×10(4)M(-1) using UV absorption, which was in good agreement with the binding constant obtained from fluorescence method (3.866×10(4)M(-1)). The binding distance between HSA and this complex was estimated to be 2.48nm according to Förster theory of non-radioactive energy transfer. Molecular modeling studies suggested that hydrophobic interaction was the predominant intermolecular forces stabilizing Co(III) complex-HSA system.
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Affiliation(s)
- F Janati Fard
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
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117
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Habibi MH, Mikhak M. Synthesis, spectral, photolysis and electrochemical studies of mononuclear copper(II) complex with a new asymmetric tetradentate ligand: application as copper nanoparticle precursor. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 96:501-505. [PMID: 22728968 DOI: 10.1016/j.saa.2012.05.081] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2012] [Revised: 05/21/2012] [Accepted: 05/29/2012] [Indexed: 06/01/2023]
Abstract
A copper(II) complex with asymmetric tetradentate Schiff base ligand, obtained by the single condensation of 1,2-diaminopropane with 2-hydroxy-5-methoxy benzaldehyde was prepared. The ligand and complex were characterized by their IR, UV-Vis, FT-IR, NMR spectra and CV. Crystal structures of the mononuclear copper complex have been obtained by X-ray diffraction studies which revealed to be distorted square planner coordination geometry. The spectral data confirm coordination of ligand to copper ion center. The redox properties of complex at different scan rates exhibit grossly similar features consisting of an electrochemically pseudo-reversible Cu(II)/Cu(I) reduction at ca. -0.97 V and pseudo-reversible Cu(I)/Cu(II) oxidation at ca. -0.81 V. The copper nanoparticles with average size of 73 nm were formed by thermal reduction of copper complex in the presence of triphenylphosphine.
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118
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Rodionova LI, Smirnov AV, Borisova NE, Khrustalev VN, Moiseeva AA, Grünert W. Binuclear cobalt complex with Schiff base ligand: Synthesis, characterization and catalytic properties in partial oxidation of cyclohexane. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2012.06.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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119
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Salehi M, Mereiter K, Amirnasr M. Synthesis, characterization and spectral investigation of salen-type cobalt(iii) schiff base complexes. x-ray crystal structure of trans-[Co(Me-Salen)(3-Acetylpyridine)2]ClO4. RUSS J COORD CHEM+ 2012. [DOI: 10.1134/s1070328412070093] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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120
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Indumathy R, Weyhermüller T, Rajapandian V, Subramanian V, Nair BU. An unusual oxidation of the imidazolyl ring in a cobalt terpyridyl complex: Crystal structure and photonuclease activity of the transformed cobalt terpyridyl complex. Polyhedron 2012. [DOI: 10.1016/j.poly.2012.06.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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121
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Binding Studies of a New Water-Soluble Iron(III) Schiff Base Complex to DNA Using Multispectroscopic Methods. Bioinorg Chem Appl 2012; 2012:126451. [PMID: 22899896 PMCID: PMC3415175 DOI: 10.1155/2012/126451] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Accepted: 06/11/2012] [Indexed: 11/17/2022] Open
Abstract
A novel iron(III) complex [Fe(SF)](ClO4)3.2H2O; in which SF = N,N0-bis{5-[(triphenylphosphonium chloride)-methyl] salicylidene}-o-phenylenediamine) has been synthesized and characterized using different physicochemical methods. The binding of this complex with calf thymus (CT) DNA was investigated by circular dichroism, absorption studies, emission spectroscopy, voltammetric studies, and viscosity measurements. The results showed that this complex can bind to DNA via external and groove binding modes.
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122
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Beyramabadi SA, Morsali A, Vahidi SH, Khoshkholgh MJ, Esmaeili AA. N,N′-dipyridoxyl(ethylenediamine) schiff-base ligand and its square-pyramidal copper(II) complex: Synthesis, experimental and theoretical characterization. J STRUCT CHEM+ 2012. [DOI: 10.1134/s0022476612030079] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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123
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Ahmadi M, Mague JT, Akbari A, Takjoo R. Dianion N1,N4-bis(salicylidene)-S-allyl-thiosemicarbazide complexes: Synthesis, structure, spectroscopy and thermal behavior. Polyhedron 2012. [DOI: 10.1016/j.poly.2012.05.004] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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124
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Kinetics and thermodynamics of irreversible inhibition of matrix metalloproteinase 2 by a Co(III) Schiff base complex. J Biol Inorg Chem 2012; 17:853-60. [PMID: 22729838 DOI: 10.1007/s00775-012-0902-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2012] [Accepted: 04/24/2012] [Indexed: 01/14/2023]
Abstract
Cobalt(III) Schiff base complexes have been used as potent inhibitors of protein function through the coordination to histidine residues essential for activity. The kinetics and thermodynamics of the binding mechanism of Co(acacen)(NH(3))(2)Cl [Co(acacen); where H(2)acacen is bis(acetylacetone)ethylenediimine] enzyme inhibition has been examined through the inactivation of matrix metalloproteinase 2 (MMP-2) protease activity. Co(acacen) is an irreversible inhibitor that exhibits time- and concentration-dependent inactivation of MMP-2. Co(acacen) inhibition of MMP-2 is temperature-dependent, with the inactivation increasing with temperature. Examination of the formation of the transition state for the MMP-2/Co(acacen) complex was determined to have a positive entropy component indicative of greater disorder in the MMP-2/Co(acacen) complex than in the reactants. With further insight into the mechanism of Co(acacen) complexes, Co(III) Schiff base complex protein inactivators can be designed to include features regulating activity and protein specificity. This approach is widely applicable to protein targets that have been identified to have clinical significance, including matrix metalloproteinases. The mechanistic information elucidated here further emphasizes the versatility and utility of Co(III) Schiff base complexes as customizable protein inhibitors.
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125
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Siega P, Vrdoljak V, Tavagnacco C, Dreos R. Synthesis, characterization, and electrochemical properties of a new series of inorganic and organometallic Co(III) complexes with a Schiff base ligand derived from tyrosine. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2011.12.057] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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126
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Fleck M, Karmakar D, Ghosh M, Ghosh A, Saha R, Bandyopadhyay D. Synthetic aspects, crystal structure and antibacterial activity of two new Schiff base cobalt(III) complexes. Polyhedron 2012. [DOI: 10.1016/j.poly.2011.12.019] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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127
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Tsiliou S, Kefala LA, Perdih F, Turel I, Kessissoglou DP, Psomas G. Cobalt(II) complexes with non-steroidal anti-inflammatory drug tolfenamic acid: Structure and biological evaluation. Eur J Med Chem 2011; 48:132-42. [PMID: 22207007 DOI: 10.1016/j.ejmech.2011.12.004] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Revised: 11/28/2011] [Accepted: 12/03/2011] [Indexed: 12/22/2022]
Abstract
Cobalt(II) complexes with the non-steroidal anti-inflammatory drug tolfenamic acid in the presence or absence of nitrogen-donor heterocyclic ligands (2,2'-bipyridine, 1,10-phenanthroline, 2,2'-bipyridylamine or pyridine) have been synthesized and characterized with physicochemical and spectroscopic techniques. The deprotonated tolfenamato ligands are coordinated to Co(II) ion through carboxylato oxygen atoms. The crystal structures of complexes [bis(2,2'-bipyridine) bis(methanol)bis(tolfenamato)cobalt(II)] 2 and [bis(2,2'-bipyridylamine)bis(tolfenamato)cobalt(II)] 4 have been determined by X-ray crystallography. UV studies of the interaction of the complexes with calf-thymus DNA (CT DNA) have shown that the complexes can bind to CT DNA and [bis(methanol)(1,10-phenanthroline)bis(tolfenamato)cobalt(II)] exhibits the highest binding constant to CT DNA. The cyclic voltammograms of the complexes recorded in DMSO solution and in the presence of CT DNA in 1/2 DMSO/buffer (containing 150 mM NaCl and 15 mM trisodium citrate at pH 7.0) solution have shown that they can bind to CT DNA by the intercalative binding mode which has also been verified by DNA solution viscosity measurements. Competitive study with ethidium bromide (EB) has shown that the complexes can displace the DNA-bound EB indicating that they bind to DNA in strong competition with EB. Tolfenamic acid and its cobalt(II) complexes exhibit good binding propensity to human or bovine serum albumin protein having relatively high binding constant values.
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Affiliation(s)
- Sofia Tsiliou
- Department of General and Inorganic Chemistry, Faculty of Chemistry, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
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128
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Beyramabadi SA, Morsali A, Khoshkholgh MJ, Esmaeili AA. N,N'-dipyridoxyl Schiff bases: synthesis, experimental and theoretical characterization. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 83:467-471. [PMID: 21943715 DOI: 10.1016/j.saa.2011.08.067] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2011] [Revised: 08/13/2011] [Accepted: 08/29/2011] [Indexed: 05/31/2023]
Abstract
Three N,N'-dipyridoxyl Schiff bases (L1, L2 and L3) have been newly synthesized and characterized by IR, (1)H NMR, mass spectrometry and elemental analysis. Their optimized geometries together with the theoretical assignment of the vibrational frequencies and the (1)H NMR chemical shifts of them have been computed by using density functional theory (DFT) method. In the optimized structures of the Schiff bases, two pyridine rings are not in a same plane; however the substitutions are essentially in the same plane with the pyridine rings. Also, the benzene ring(s) in the bridge region is (are) not in the same plane with the pyridine rings and azomethine moieties. In all the species, engagement in intramolecular-hydrogen bonds causes to weakness of the phenolic O-H bonds. Consistency between the theoretical results and experimental evidence confirms suitability of the optimized geometries for the synthesized Schiff bases.
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Affiliation(s)
- S Ali Beyramabadi
- Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran.
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129
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Dimiza F, Papadopoulos AN, Tangoulis V, Psycharis V, Raptopoulou CP, Kessissoglou DP, Psomas G. Biological evaluation of cobalt(II) complexes with non-steroidal anti-inflammatory drug naproxen. J Inorg Biochem 2011; 107:54-64. [PMID: 22178666 DOI: 10.1016/j.jinorgbio.2011.10.014] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Revised: 10/03/2011] [Accepted: 10/17/2011] [Indexed: 12/28/2022]
Abstract
Cobalt(II) complexes with the non-steroidal anti-inflammatory drug naproxen in the presence or absence of nitrogen-donor heterocyclic ligands (pyridine, 2,2'-bipyridine or 1,10-phenanthroline) have been synthesized and characterized with physicochemical and spectroscopic techniques. The deprotonated naproxen acts as monodentate ligand coordinated to Co(II) ion through a carboxylato oxygen. The crystal structure of [bis(aqua)bis(naproxenato)bis(pyridine)cobalt(II)], 2 has been determined by X-ray crystallography. The EPR spectrum of complex 2 in frozen solution reveals that it retains its structure. UV study of the interaction of the complexes with calf-thymus DNA (CT DNA) has shown that the complexes can bind to CT DNA and [(2,2'-bipyridine)bis(methanol)bis(naproxenato)cobalt(II)] exhibits the highest binding constant to CT DNA. The cyclic voltammograms of the complexes recorded in DMSO solution and in the presence of CT DNA in 1/2 DMSO/buffer (containing 150 mM NaCl and 15 mM trisodium citrate at pH 7.0) solution have shown that they can bind to CT DNA by the intercalative binding mode which has also been verified by DNA solution viscosity measurements. Competitive study with ethidium bromide (EB) has shown that the complexes can displace the DNA-bound EB indicating that they bind to DNA in strong competition with EB. Naproxen and its cobalt(II) complexes exhibit good binding propensity to human or bovine serum albumin proteins having relatively high binding constant values. The antioxidant activity of the compounds has been evaluated indicating their high scavenging activity against hydroxyl free radicals and superoxide radicals.
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Affiliation(s)
- Filitsa Dimiza
- Department of General and Inorganic Chemistry, Faculty of Chemistry, Aristotle University of Thessaloniki, P.O. Box 135, GR-54124 Thessaloniki, Greece
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130
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Lucas CR, Byrne JM, Collins JL, Dawe LN, Miller DO. Cobalt and nickel complexes of open-chain thioether ligands terminated by salicylaldimine functionality*This article has a companion paper in this issue (doi: 10.1139/v11-083). CAN J CHEM 2011. [DOI: 10.1139/v11-081] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Syntheses of 1,11-bis(salicylaldimine)-3,6,9-trithiaundecane (H2L1), 1,11-bis(salicylaldimine)-6-oxa-3,9-dithiaundecane (H2L2), and 1,8-bis(salicylaldimine)-3,6-dithiaundecane (H2L3), their nickel complexes [Ni(L1)]·H2O (I), [Ni(HL2)][OAc] (II), [Ni(L3)·HOAc]2[Ni(L3)·2HOAc]·3H2O (III), [Ni(HL1-sal)]Cl2·H2O (IV), [Ni(HL2-sal)]Cl2·CH3OH (V), [Ni(L3-sal)Cl]·H2O (VI), {[Ni(HL1-sal)]Br2}2{[Ni(L1-sal)]Br}·H2O (VII), {[Ni(HL2-sal)]Br2}2{[Ni(L2-sal)]Br}·2CH3OH (VIII), {[Ni(HL3-sal)Br]Br}[Ni(L3-sal)Br]·2CH3OH (IX), [Ni(HL3-sal)Br]Br·CH3OH (X), [Ni(HL3)Br]·2H2O (XI), [Ni(HL1)]2[BF4]2·5H2O (XII), [Ni(HL2)]2[BF4]2·3H2O (XIII), [Ni(HL3)]2[BF4]2·CH3CN (XIV), and [Ni(HL3)]2[BF4]2·3H2O (XV) and their cobalt complexes [Co(L1-sal)][BF4]2 (XVI), [Co(L2)][OAc]·3H2O (XVII), [Co(L3)][OAc]·3H2O (XVIII), [Co(L3)][BF4] (XIX), and [Co(L3-sal)(CH3OH)][BF4]2·CH3OH (XX) are reported. Single crystal X-ray structural studies for III, XIV, XVI, and XIX are described. Cyclic voltammograms of the ligands and of I, II, III, VII, VIII, X, XIV, and XIX are discussed. Electronic spectra of the ligands and complexes are discussed.
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Affiliation(s)
- C. Robert Lucas
- Department of Chemistry, Memorial University of Newfoundland, St. John’s, NL A1B 3X7, Canada
| | - John M.D. Byrne
- Department of Chemistry, Memorial University of Newfoundland, St. John’s, NL A1B 3X7, Canada
| | - Julie L. Collins
- Department of Chemistry, Memorial University of Newfoundland, St. John’s, NL A1B 3X7, Canada
| | - Louise N. Dawe
- Department of Chemistry, Memorial University of Newfoundland, St. John’s, NL A1B 3X7, Canada
| | - David O. Miller
- Department of Chemistry, Memorial University of Newfoundland, St. John’s, NL A1B 3X7, Canada
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131
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Dimiza F, Papadopoulos AN, Tangoulis V, Psycharis V, Raptopoulou CP, Kessissoglou DP, Psomas G. Biological evaluation of non-steroidal anti-inflammatory drugs-cobalt(II) complexes. Dalton Trans 2011; 39:4517-28. [PMID: 20372735 DOI: 10.1039/b927472c] [Citation(s) in RCA: 197] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cobalt(II) complexes with the non-steroidal anti-inflammatory drug mefenamic acid in the presence or absence of nitrogen donor heterocyclic ligands (2,2'-bipyridine, 1,10-phenanthroline or pyridine) have been synthesized and characterized with physicochemical and spectroscopic techniques. The experimental data suggest that mefenamic acid acts as deprotonated monodentate ligand coordinated to Co(II) ion through a carboxylato oxygen. The crystal structures of tetrakis(methanol)bis-(mefenamato)cobalt(II), 1 and (2,2'-bipyridine)bis(methanol)bis(mefenamato)cobalt(II), 2 have been determined by X-ray crystallography. The EPR spectra of complexes 1 and 2 in frozen solution reveal that they retain their structures. UV study of the interaction of the complexes with calf-thymus DNA (CT DNA) has shown that the complexes can bind to CT DNA and bis(methanol)bis(pyridine)bis-(mefenamato)cobalt(II) exhibits the highest binding constant. Competitive study with ethidium bromide (EB) has shown that the complexes can displace the DNA-bound EB indicating that they bind to DNA in strong competition with EB. The cyclic voltammograms of the complexes recorded in dmso solution and in the presence of CT DNA in 1 : 2 dmso : buffer (containing 150 mM NaCl and 15 mM trisodium citrate at pH 7.0) solution have shown that they can bind to CT DNA by the intercalative binding mode. Mefenamic acid and its cobalt(II) complexes exhibit good binding propensity to human or bovine serum albumin protein having relatively high binding constant values. The antioxidant activity of the compounds has been evaluated indicating their high scavenging activity against hydroxyl free radicals and superoxide radicals.
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Affiliation(s)
- Filitsa Dimiza
- Department of General and Inorganic Chemistry, Faculty of Chemistry, Aristotle University of Thessaloniki, P.O. Box 135, GR-54124, Thessaloniki, Greece
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132
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Khalaji AD, Maghsodlou Rad S, Grivani G, Rezaei M, Gotoh K, Ishida H. Cobalt(III) Complex [CoL3] Derived from an Asymmetric Bidentate Schiff Base Ligand L (L=(5-Bromo-2-hydroxybenzyl-2-furylmethyl)-imine): Synthesis, Characterization and Crystal Structure. CHINESE J CHEM 2011. [DOI: 10.1002/cjoc.201180289] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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133
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Mortamet AC, Pethrick RA. Redox initiated free radical polymerization of 4-methylstyrene. J Appl Polym Sci 2011. [DOI: 10.1002/app.34455] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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134
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Bagherzadeh M, Zare M. Oxidation of sulfides with urea–hydrogen peroxide catalyzed by iron–salen complexes. J Sulphur Chem 2011. [DOI: 10.1080/17415993.2011.593634] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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135
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Silva MAS, Paulo TDF, Pinheiro SDO, Batista AA, Ellena J, Sousa EH, Lopes LGDF, Diógenes IC. Asymmetric heterobimetallic mixed-valence complex trans-[(SO3)Co(cyclam)(NCS)Ru(NH3)4(NCS)](BF4): Synthesis and characterization. Polyhedron 2011. [DOI: 10.1016/j.poly.2011.05.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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136
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Najafi M, Rahbar M, Naseri MA. Cyclic voltammetry study of the electrocatalytic reduction of sevoflurane by a cobalt(III) Schiff base complex in the presence of oxygen. J Electroanal Chem (Lausanne) 2011. [DOI: 10.1016/j.jelechem.2011.03.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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137
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Meghdadi S, Amirnasr M, Mereiter K, Molaee H, Amiri A. Synthesis, structure and electrochemistry of Co(III) complexes with an unsymmetrical Schiff base ligand derived from 2-aminobenzylamine and pyrrole-2-carboxaldehyde. Polyhedron 2011. [DOI: 10.1016/j.poly.2011.03.041] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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138
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Amirnasr M, Fadaee F, Mereiter K. Synthesis, and characterization of cobalt(III) complexes with Schiff bases derived from 2-hydroxynaphthaldehyde, (naph)2dien and (naph)2dpt, and monodentate amine ligands: Crystal structure, spectral and redox properties. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.02.027] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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139
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Synthesis, spectroscopic characterization, and antimicrobial activity of cobalt(II) complexes of acetone-N(4)-phenylsemicarbazone: crystal structure of [Co(HL)2(MeOH)2](NO3)2. TRANSIT METAL CHEM 2011. [DOI: 10.1007/s11243-011-9485-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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140
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Eshtiagh-Hosseini H, Housaindokht MR, Beyramabadi SA, Tabatabaei SHM, Esmaeili AA, Khoshkholgh MJ. Synthesis, experimental and theoretical characterization of N,N'-dipyridoxyl (1,4-butanediamine) Schiff-base ligand and its Cu(II) complex. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 78:1046-1050. [PMID: 21233009 DOI: 10.1016/j.saa.2010.12.045] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2010] [Revised: 12/12/2010] [Accepted: 12/14/2010] [Indexed: 05/30/2023]
Abstract
A new N,N'-dipyridoxyl(1,4-butanediamine) [=H(2)BS] Schiff-base ligand and its Cu(II) salen complex, [Cu(BS)(H(2)O)(CH(3)OH)], were synthesized and characterized by IR, UV-vis, (1)H NMR, mass spectrometry and elemental analysis. Also, full optimization of the geometries, (1)H NMR chemical shifts (for the H(2)BS) and vibrational frequencies were calculated by using density functional theory (DFT) method. Structure of the H(2)BS ligand is not planar, i.e. two pyridine rings are not in the same plane. In the structure of the Cu complex, the Schiff-base ligand acts as a dianionic tetradentate ligand in N, N, O(-), O(-) manner. The coordinating atoms of BS(2-) occupy equatorial positions of the octahedral complex, where the H(2)O and CH(3)OH ligands locate at axial positions. The calculated results are in good agreement with the experimental data, confirming the suitability of the proposed and optimized structures for the H(2)BS ligand and its Cu complex.
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141
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Das B, Ghosh K, Baruah JB. Coordination complex of dipicolinato cobalt(III) complex cation and anion. J COORD CHEM 2011. [DOI: 10.1080/00958972.2010.551658] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Babulal Das
- a Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781 039, Assam, India
| | - Kaushik Ghosh
- a Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781 039, Assam, India
| | - Jubaraj B. Baruah
- a Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781 039, Assam, India
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142
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Synthesis, characterization and biological studies of some Co(II), Ni(II) and Cu(II) complexes derived from indole-3-carboxaldehyde and glycylglycine as Schiff base ligand. ARAB J CHEM 2010. [DOI: 10.1016/j.arabjc.2010.05.001] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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143
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Lin ZD, Qu Y, Zeng W. Synthesis, characterization, electrochemical and crystal structure investigation of bis(2-((2-aminoethylimino)methyl)-6-methoxyphenolato) cobalt(III). J COORD CHEM 2010. [DOI: 10.1080/00958970801930054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Zhi-Dong Lin
- a School of Materials Science and Engineering , Wuhan Institute of Technology , Wuhan 430073, People's Republic of China
- b State Key Laboratory of New Nonferrous Metal Materials , Gansu University of Technology , Lanzhou 730050, People's Republic of China
| | - Yang Qu
- c Institute of Biochemistry, Department of Chemistry , Huazhong Agricultural University , Wuhan 430070, People's Republic of China
| | - Wen Zeng
- a School of Materials Science and Engineering , Wuhan Institute of Technology , Wuhan 430073, People's Republic of China
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144
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Chang EL, Simmers C, Knight DA. Cobalt Complexes as Antiviral and Antibacterial Agents. Pharmaceuticals (Basel) 2010; 3:1711-1728. [PMID: 27713325 PMCID: PMC4033948 DOI: 10.3390/ph3061711] [Citation(s) in RCA: 162] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2010] [Revised: 05/04/2010] [Accepted: 05/14/2010] [Indexed: 12/02/2022] Open
Abstract
Metal ion complexes are playing an increasing role in the development of antimicrobials. We review here the antimicrobial properties of cobalt coordination complexes in oxidation state 3+. In addition to reviewing the cobalt complexes containing polydentate donor ligands, we also focus on the antimicrobial activity of the homoleptic [Co(NH3)6]3+ ion.
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Affiliation(s)
- Eddie L Chang
- Center for Bio/Molecular Science and Engineering, Naval Research Laboratory, 4555 Overlook Avenue S.W., Washington, DC 20375, USA.
| | - Christa Simmers
- Chemistry Department, Florida Institute of Technology, 150 West University Boulevard, Melbourne, FL 32901, USA.
| | - D Andrew Knight
- Chemistry Department, Florida Institute of Technology, 150 West University Boulevard, Melbourne, FL 32901, USA.
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145
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Cobalt(III) complexes of some aromatic thiohydrazides – Synthesis, characterization and structure. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.01.011] [Citation(s) in RCA: 8] [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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146
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Synthesis, characterization and electrochemistry of carboxamido Co(III) complexes: The crystal structure of [CoIII(Mebpb)(N-MeIm)2]BPh4·CH3OH. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.01.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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147
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Zhuang X, Oyaizu K, Niu Y, Koshika K, Chen X, Nishide H. Synthesis and Electrochemistry of Schiff Base Cobalt(III) Complexes and Their Catalytic Activity for Copolymerization of Epoxide and Carbon Dioxide. MACROMOL CHEM PHYS 2010. [DOI: 10.1002/macp.200900472] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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148
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Rajasekar M, Sreedaran S, Prabu R, Narayanan V, Jegadeesh R, Raaman N, Kalilur Rahiman A. Synthesis, characterization, and antimicrobial activities of nickel(II) and copper(II) Schiff-base complexes. J COORD CHEM 2009. [DOI: 10.1080/00958970903296362] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- M. Rajasekar
- a PG & Research Department of Chemistry , The New College (Autonomous) , Chennai 600 014 , Tamil Nadu , India
| | - S. Sreedaran
- b Department of Inorganic Chemistry , School of Chemical Sciences, University of Madras , Guindy Campus, Chennai 600 025 , Tamil Nadu , India
| | - R. Prabu
- b Department of Inorganic Chemistry , School of Chemical Sciences, University of Madras , Guindy Campus, Chennai 600 025 , Tamil Nadu , India
| | - V. Narayanan
- b Department of Inorganic Chemistry , School of Chemical Sciences, University of Madras , Guindy Campus, Chennai 600 025 , Tamil Nadu , India
| | - R. Jegadeesh
- c Centre for Advanced Studies in Botany, University of Madras , Guindy Campus, Chennai 600 025 , Tamil Nadu , India
| | - N. Raaman
- c Centre for Advanced Studies in Botany, University of Madras , Guindy Campus, Chennai 600 025 , Tamil Nadu , India
| | - A. Kalilur Rahiman
- a PG & Research Department of Chemistry , The New College (Autonomous) , Chennai 600 014 , Tamil Nadu , India
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149
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Synthesis, structural characterization and antibacterial activity of 2,6-diacetylpyridine bis(benzenesulfonohydrazide) Schiff bases and their copper(II) complexes. Polyhedron 2009. [DOI: 10.1016/j.poly.2009.06.059] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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150
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Saleh AA, Tawfik ARM, El Ghamry MA, Abu-el-wafa SM. Interaction of SO2 with unsaturated Schiff-base complexes; thermal, magnetic, and spectroscopic studies. J COORD CHEM 2009. [DOI: 10.1080/00958970903060008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Akila A. Saleh
- a Faculty of Education, Department of Chemistry , Ain Shams University , Roxy, Cairo, Egypt
| | - Abdel Razak M. Tawfik
- a Faculty of Education, Department of Chemistry , Ain Shams University , Roxy, Cairo, Egypt
- b Department of Inorganic Chemistry , Ain Shams University , Cairo, Egypt
| | - Mosad A. El Ghamry
- a Faculty of Education, Department of Chemistry , Ain Shams University , Roxy, Cairo, Egypt
| | - Samy M. Abu-el-wafa
- a Faculty of Education, Department of Chemistry , Ain Shams University , Roxy, Cairo, Egypt
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