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Ahmed S, Rafi UM, Senthil Kumar R, Bhat AR, Berredjem M, Niranjan V, C L, Rahiman AK. Theoretical, antioxidant, antidiabetic and in silico molecular docking and pharmacokinetics studies of heteroleptic oxovanadium(IV) complexes of thiosemicarbazone-based ligands and diclofenac. J Biomol Struct Dyn 2024; 42:8407-8426. [PMID: 37599509 DOI: 10.1080/07391102.2023.2246565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 08/03/2023] [Indexed: 08/22/2023]
Abstract
A series of new heteroleptic oxovanadium(IV) complexes with the general formula [VOL1-6(Dcf)] (1-6), where L1-6 = thiosemicarbazone (TSC)-based ligands and Dcf = diclofenac have been synthesized and characterized. The spectral studies along with the density functional theory calculations evidenced the distorted square-pyramidal geometry around oxovanadium(IV) ion through imine nitrogen and thione sulfur atoms of TSC moiety, and two asymmetric carboxylate oxygen atoms of diclofenac drug. The complexes were evaluated for in vitro antioxidant activity using 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), 2,2'-diphenyl-1-picrylhydrazyl (DPPH), hydrogen peroxide (H2O2) and superoxide radical scavenging assays with respect to the standard antioxidant drugs butylated hydroxyanisole (BHA) and rutin. The in vitro antidiabetic activity of the complexes was tested with enzymes such as α-amylase, α-glucosidase and glucose-6-phosphatase. The complexes containing methyl substituent showed higher activity than that containing the nitro substituent due to the electron-donating effect of methyl group. The in silico molecular docking studies of the oxovanadium(IV) complexes with α-amylase and α-glucosidase enzymes showed strong interaction via hydrogen bonding and hydrophobic interactions. The dynamic behavior of the proposed complexes was analyzed by molecular dynamics (MDs) simulations, which revealed the stability of docked structures with α-amylase and α-glucosidase enzymes. The in silico physicochemical and pharmacokinetics parameters, such as Lipinski's 'rule of five', Veber's rule and absorption, distribution, metabolism and excretion (ADME) properties predicted non-toxic, non-carcinogenic and safe oral administration of the synthesized complexes.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Sumeer Ahmed
- Post-Graduate and Research Department of Chemistry, The New College (Autonomous), University of Madras, Chennai, India
| | - Ummer Muhammed Rafi
- Post-Graduate and Research Department of Chemistry, The New College (Autonomous), University of Madras, Chennai, India
| | - Raju Senthil Kumar
- Department of Pharmaceutical Chemistry, Swamy Vivekanandha College of Pharmacy, Elayampalayam, Tiruchengodu, India
| | - Ajmal Rashid Bhat
- Department of Chemistry, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, India
| | - Malika Berredjem
- Laboratory of Applied Organic Chemistry LCOA, Synthesis of Biomolecules and Molecular Modelling Group, Badji-Mokhtar-Annaba University, Annaba, Algeria
| | - Vidya Niranjan
- Department of Biotechnology, RV College of Engineering, Bengaluru, India
| | - Lavanya C
- Department of Biotechnology, RV College of Engineering, Bengaluru, India
| | - Aziz Kalilur Rahiman
- Post-Graduate and Research Department of Chemistry, The New College (Autonomous), University of Madras, Chennai, India
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2
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Ahmed S, Mahendiran D, Bhat AR, Rahiman AK. Theoretical, in Vitro Antiproliferative, and in Silico Molecular Docking and Pharmacokinetics Studies of Heteroleptic Nickel(II) and Copper(II) Complexes of Thiosemicarbazone-Based Ligands and Pefloxacin. Chem Biodivers 2023; 20:e202300702. [PMID: 37528701 DOI: 10.1002/cbdv.202300702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 07/25/2023] [Accepted: 08/01/2023] [Indexed: 08/03/2023]
Abstract
Twelve new heteroleptic nickel(II) and copper(II) complexes of the type [M(L1-6 )(Pfx)2 ] (1-12), where L1-6 =2-benzylidenehydrazinecarbothioamide (L1 ), 2-benzylidene-N-methylhydrazinecarbothioamide (L2 ), 2-benzylidene-N-phenylhydrazinecarbothioamide (L3 ), 2-(4-methylbenzylidene)hydrazinecarbothioamide (L4 ), 2-(4-methylbenzylidene)-N-methylhydrazinecarbothioamide (L5 ) and 2-(4-methylbenzylidene)-N-phenylhydrazinecarbothioamide (L6 ), Pfx=pefloxacin and M=Ni(II) or Cu(II) have been synthesised, and their structures were confirmed by different spectral techniques. The spectral data and density functional theory (DFT) calculations supported the bonding of pefloxacin drug molecule via one of the carboxylate oxygen atoms and the pyridone oxygen atom, and the thiosemicarbazone ligand via the imine nitrogen and the thione sulfur atoms with the metal(II) ion, forming distorted octahedral geometry. In vitro antiproliferative activity of the synthesized complexes was evaluated against three human breast cancer (T47D, estrogen negative (MDA-MB-231) and estrogen positive (MCF-7)) as well as non-tumorigenic human breast epithelial (MCF-10a) cell lines, which showed the higher activity for the copper(II) complexes. The interaction of the synthesized complexes with an oncogenic protein H-ras (121 p) was explored by in silico molecular docking studies. Further, in silico pharmacokinetics and ADMET parameters were also analysed to predict the drug-likeness as well as non-toxic and non-carcinogenic behavior, and safe oral administration of the complexes.
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Affiliation(s)
- Sumeer Ahmed
- Post-Graduate and Research Department of Chemistry, The New College (Autonomous), University of Madras, Chennai, 600 014, India
| | - Dharmasivam Mahendiran
- Center for Cancer Cell Biology and Drug Discovery, Griffith Institute for Drug Discovery, Griffith University, Nathan, Brisbane, Queensland, 4111, Australia
| | - Ajmal Rashid Bhat
- Department of Chemistry, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, 440 033, India
| | - Aziz Kalilur Rahiman
- Post-Graduate and Research Department of Chemistry, The New College (Autonomous), University of Madras, Chennai, 600 014, India
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Dopp CM, Golwankar RR, Kelsey SR, Douglas JT, Erickson AN, Oliver AG, Day CS, Day VW, Blakemore JD. Vanadyl as a Spectroscopic Probe of Tunable Ligand Donor Strength in Bimetallic Complexes. Inorg Chem 2023. [PMID: 37315176 DOI: 10.1021/acs.inorgchem.3c00724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Incorporation of secondary metal ions into heterobimetallic complexes has emerged as an attractive strategy for rational tuning of compounds' properties and reactivity, but direct solution-phase spectroscopic interrogation of tuning effects has received less attention than it deserves. Here, we report the assembly and study of a series of heterobimetallic complexes containing the vanadyl ion, [VO]2+, paired with monovalent cations (Cs+, Rb+, K+, Na+, and Li+) and a divalent cation (Ca2+). These complexes, which can be isolated in pure form or generated in situ from a common monometallic vanadyl-containing precursor, enable experimental spectroscopic and electrochemical quantification of the influence of the incorporated cations on the properties of the vanadyl moiety. The data reveal systematic shifts in the V-O stretching frequency, isotropic hyperfine coupling constant for the vanadium center, and V(V)/V(IV) reduction potential in the complexes. These shifts can be interpreted as charge density effects parametrized through the Lewis acidities of the cations, suggesting broad potential for the vanadyl ion to serve as a spectroscopic probe in multimetallic species.
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Affiliation(s)
- Claire M Dopp
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
| | - Riddhi R Golwankar
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
| | - Shaun R Kelsey
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
| | - Justin T Douglas
- Nuclear Magnetic Resonance Laboratory, Molecular Structures Group, University of Kansas, 2034 Becker Dr, Lawrence, Kansas 66047, United States
| | - Alexander N Erickson
- Department of Chemistry, University of Memphis, 3744 Walker Avenue, Memphis, Tennessee 38152, United States
| | - Allen G Oliver
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Cynthia S Day
- Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27109, United States
| | - Victor W Day
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
| | - James D Blakemore
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
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Ribeiro N, Farinha PF, Pinho JO, Luiz H, Mészáros JP, Galvão AM, Costa Pessoa J, Enyedy ÉA, Reis CP, Correia I, Gaspar MM. Metal Coordination and Biological Screening of a Schiff Base Derived from 8-Hydroxyquinoline and Benzothiazole. Pharmaceutics 2022; 14:pharmaceutics14122583. [PMID: 36559078 PMCID: PMC9785144 DOI: 10.3390/pharmaceutics14122583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 11/20/2022] [Accepted: 11/22/2022] [Indexed: 11/25/2022] Open
Abstract
Designing new metallodrugs for anticancer therapy is a driving force in the scientific community. Aiming to contribute to this field, we hereby report the development of a Schiff base (H2L) derived from the condensation of 2-carbaldehyde-8-hydroxyquinoline with 2-hydrazinobenzothiazole and its complexation with transition metal ions. All compounds were characterised by analytical and spectroscopic techniques, which disclosed their structure: [Cu(HL)Cl], [Cu(HL)2], [Ni(HL)(acetate)], [Ni(HL)2], [Ru(HL)Cl(DMSO)], [VO(HL)2] and [Fe(HL)2Cl(H2O)]. Different binding modes were proposed, showing the ligand’s coordination versatility. The ligand proton dissociation constants were determined, and the tested compounds showed high lipophilicity and light sensitivity. The stability of all complexes in aqueous media and their ability to bind to albumin were screened. Based on an antiproliferative in vitro screening, [Ni(HL)(acetate)] and [Ru(HL)Cl(DMSO)] were selected for further studies aiming to investigate their mechanisms of action and therapeutic potential towards colon cancer. The complexes displayed IC50 < 21 μM towards murine (CT-26) and human (HCT-116) colon cancer cell lines. Importantly, both complexes exhibited superior antiproliferative properties compared to the clinically approved 5-fluorouracil. [Ni(HL)(acetate)] induced cell cycle arrest in S phase in CT-26 cells. For [Ru(HL)Cl(DMSO)] this effect was observed in both colon cancer cell lines. Additionally, both compounds significantly inhibited cell migration particularly in the human colon cancer cell line, HCT-116. Overall, the therapeutic potential of both metal complexes was demonstrated.
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Affiliation(s)
- Nádia Ribeiro
- Centro de Química Estrutural, Institute of Molecular Sciences and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal
| | - Pedro F. Farinha
- Research Institute for Medicines, iMed.ULisboa, Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - Jacinta O. Pinho
- Research Institute for Medicines, iMed.ULisboa, Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - Hugo Luiz
- Research Institute for Medicines, iMed.ULisboa, Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - János P. Mészáros
- MTA-SZTE Lendület Functional Metal Complexes Research Group, Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
| | - Adelino M. Galvão
- Centro de Química Estrutural, Institute of Molecular Sciences and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal
| | - João Costa Pessoa
- Centro de Química Estrutural, Institute of Molecular Sciences and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal
| | - Éva A. Enyedy
- MTA-SZTE Lendület Functional Metal Complexes Research Group, Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
| | - Catarina Pinto Reis
- Research Institute for Medicines, iMed.ULisboa, Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - Isabel Correia
- Centro de Química Estrutural, Institute of Molecular Sciences and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal
- Correspondence: (I.C.); (M.M.G.)
| | - Maria Manuela Gaspar
- Research Institute for Medicines, iMed.ULisboa, Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
- Correspondence: (I.C.); (M.M.G.)
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Mono- and binuclear copper(II) complexes with different structural motifs and geometries: Synthesis, spectral characterization, DFT calculations and superoxide dismutase enzymatic activity. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115913] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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6
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Ahmed S, Jayathuna MA, Mahendiran D, Bharathi S, Kalilur Rahiman A. Heteroleptic silver(I), nickel(II), and copper(II) complexes of N
4
‐substituted thiosemicarbazones and ciprofloxacin: Theoretical, in vitro anti‐proliferative, and in silico molecular modeling and pharmacokinetics studies. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sumeer Ahmed
- Post‐Graduate and Research Department of Chemistry, The New College (Autonomous) University of Madras Chennai India
| | - Mugamathu Ali Jayathuna
- Post‐Graduate and Research Department of Chemistry, The New College (Autonomous) University of Madras Chennai India
| | - Dharmasivam Mahendiran
- Post‐Graduate and Research Department of Chemistry, The New College (Autonomous) University of Madras Chennai India
- Centre for Cancer Cell Biology and Drug Discovery Griffith Institute for Drug Discovery, Griffith University, Nathan Brisbane Queensland Australia
| | - Sundaram Bharathi
- Post‐Graduate and Research Department of Chemistry, The New College (Autonomous) University of Madras Chennai India
- Department of Chemistry, School of Basic Sciences Vels Institute of Science, Technology and Advanced Studies Chennai India
| | - Aziz Kalilur Rahiman
- Post‐Graduate and Research Department of Chemistry, The New College (Autonomous) University of Madras Chennai India
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7
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Kaur M, Kaushal R. Synthesis and in-silico molecular modelling, DFT studies, antiradical and antihyperglycemic activity of novel vanadyl complexes based on chalcone derivatives. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.132176] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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8
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Chromatographic and spectrophometric studies of vanadate (+V) reduction by 3–mercaptopropionic acid. J Inorg Biochem 2022; 230:111747. [DOI: 10.1016/j.jinorgbio.2022.111747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 01/18/2022] [Accepted: 01/30/2022] [Indexed: 11/18/2022]
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Vanadium(IV) Complexes with Methyl-Substituted 8-Hydroxyquinolines: Catalytic Potential in the Oxidation of Hydrocarbons and Alcohols with Peroxides and Biological Activity. Molecules 2021; 26:molecules26216364. [PMID: 34770772 PMCID: PMC8588223 DOI: 10.3390/molecules26216364] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 10/15/2021] [Accepted: 10/18/2021] [Indexed: 11/16/2022] Open
Abstract
Methyl-substituted 8-hydroxyquinolines (Hquin) were successfully used to synthetize five-coordinated oxovanadium(IV) complexes: [VO(2,6-(Me)2-quin)2] (1), [VO(2,5-(Me)2-quin)2] (2) and [VO(2-Me-quin)2] (3). Complexes 1-3 demonstrated high catalytic activity in the oxidation of hydrocarbons with H2O2 in acetonitrile at 50 °C, in the presence of 2-pyrazinecarboxylic acid (PCA) as a cocatalyst. The maximum yield of cyclohexane oxidation products attained was 48%, which is high in the case of the oxidation of saturated hydrocarbons. The reaction leads to the formation of a mixture of cyclohexyl hydroperoxide, cyclohexanol and cyclohexanone. When triphenylphosphine is added, cyclohexyl hydroperoxide is completely converted to cyclohexanol. Consideration of the regio- and bond-selectivity in the oxidation of n-heptane and methylcyclohexane, respectively, indicates that the oxidation proceeds with the participation of free hydroxyl radicals. The complexes show moderate activity in the oxidation of alcohols. Complexes 1 and 2 reduce the viability of colorectal (HCT116) and ovarian (A2780) carcinoma cell lines and of normal dermal fibroblasts without showing a specific selectivity for cancer cell lines. Complex 3 on the other hand, shows a higher cytotoxicity in a colorectal carcinoma cell line (HCT116), a lower cytotoxicity towards normal dermal fibroblasts and no effect in an ovarian carcinoma cell line (order of magnitude HCT116 > fibroblasts > A2780).
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Singh YP, Patel SK. Molecular structures, spectral, electrochemical, DFT and antioxidant activities of copper(II) complexes with NNO donor Schiff base ligand. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129457] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Janas Z, Jezierska J, Ozarowski A, Bieńko A, Lis T, Jezierski A, Krawczyk M. Investigation of vanadium(III) and vanadium(IV) compounds supported by the linear diaminebis(phenolate) ligands: correlation between structures and magnetic properties. Dalton Trans 2021; 50:5184-5196. [PMID: 33881036 DOI: 10.1039/d0dt04302h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A family of oxidovanadium(iv) compounds containing linear diaminebis(phenolate (salans) L1-5 ligands (L1 = [MeNCH2CH2NMe(CH2-4-CMe2CH2CMe3-C6H3O)2]2-; L2 = [MeNCH2CH2NMe(CH2-4-CH3-C6H3O)2]2-; L3 = [MeNCH2CH2NMe(CH2-4-Cl-C6H3O)2]2-; L4 = {MeNCH2CH2NMe[CH2-4,6-(CH3)2-C6H2O]2}2-; and L5 = {MeNCH2CH2NMe[CH2-4,6-(Br)2-C6H2O]2}2-) and non-oxidovanadium(iii) with L2,4 and acac ligands has been prepared and characterized by chemical and physical techniques. Reactions of [VO(acac)2] with ligand precursors H2L2,4 in toluene or hexane afforded vanadium(iii) compounds [V(L-κ4ONNO)(acac)] (1, L2; 2, L4), while the use of acetonitrile or ethanol led to the formation of dimeric oxidovanadium(iv) [(VO)2(μ-L-κ4ONNO)2] (3, L1; 4, L2; 5, L3) and monomeric [VO(L-κ4ONNO)] (6, L4, 7, L5) compounds. As shown by X-ray crystallography, compounds 1 and 2 are monomeric, in which the chelating ligands afford octahedral cis-α geometry at the vanadium center. In the dimeric structures of 3-5, the six-coordinate vanadium centers are bridged via two oxygen atoms of the L1-3 ligands while the L4,5 ligands generate square pyramidal structures of the monomeric 6 and 7 compounds. HFEPR studies allowed the determination of the spin Hamiltonian parameters of the S = 1 spin state of the monomeric V(iii) and dimeric V(iv), and S = ½ in monomeric V(iv) compounds. Magnetic measurements of 3-5 indicated weak ferromagnetic metal-metal exchange interactions. A reaction course for the deoxygenation and reduction of vanadyl-salan compounds is proposed.
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Affiliation(s)
- Zofia Janas
- Faculty of Chemistry, University of Wrocław, 14, F. Joliot-Curie, 50-383 Wrocław, Poland.
| | - Julia Jezierska
- Faculty of Chemistry, University of Wrocław, 14, F. Joliot-Curie, 50-383 Wrocław, Poland.
| | - Andrew Ozarowski
- National High Magnetic Field Laboratory, Florida State University, 1800 E. Paul Dirac Drive, Tallahassee, FL 32310, USA.
| | - Alina Bieńko
- Faculty of Chemistry, University of Wrocław, 14, F. Joliot-Curie, 50-383 Wrocław, Poland.
| | - Tadeusz Lis
- Faculty of Chemistry, University of Wrocław, 14, F. Joliot-Curie, 50-383 Wrocław, Poland.
| | - Adam Jezierski
- Faculty of Chemistry, University of Wrocław, 14, F. Joliot-Curie, 50-383 Wrocław, Poland.
| | - Marta Krawczyk
- Faculty of Pharmacy, Wrocław Medical University, 211 Borowska, 50-556 Wrocław, Poland
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Kaur M, Kaushal R. Synthesis, characterization and
α
‐amylase and
α
‐glucosidase inhibition studies of novel vanadyl chalcone complexes. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mandeep Kaur
- Department of Chemistry National Institute of Technology Hamirpur India
| | - Raj Kaushal
- Department of Chemistry National Institute of Technology Hamirpur India
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13
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Szklarzewicz J, Jurowska A, Matoga D, Kruczała K, Kazek G, Mordyl B, Sapa J, Papież M. Synthesis, coordination properties and biological activity of vanadium complexes with hydrazone Schiff base ligands. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114589] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Szklarzewicz J, Jurowska A, Hodorowicz M, Gryboś R, Kruczała K, Głuch-Lutwin M, Kazek G. Vanadium complexes with salicylaldehyde-based Schiff base ligands—structure, properties and biological activity. J COORD CHEM 2020. [DOI: 10.1080/00958972.2020.1755036] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
| | - Anna Jurowska
- aFaculty of Chemistry, Jagiellonian University, Kraków, Poland
| | | | - Ryszard Gryboś
- aFaculty of Chemistry, Jagiellonian University, Kraków, Poland
| | | | - Monika Głuch-Lutwin
- bFaculty of Pharmacy, Jagiellonian University Medical College, Kraków, Poland
| | - Grzegorz Kazek
- bFaculty of Pharmacy, Jagiellonian University Medical College, Kraków, Poland
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Bharathi S, Mahendiran D, Kumar RS, Choi HJ, Gajendiran M, Kim K, Rahiman AK. Silver(I) metallodrugs of thiosemicarbazones and naproxen: biocompatibility, in vitro anti-proliferative activity and in silico interaction studies with EGFR, VEGFR2 and LOX receptors. Toxicol Res (Camb) 2020; 9:28-44. [PMID: 32440336 PMCID: PMC7233324 DOI: 10.1093/toxres/tfaa001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 12/27/2019] [Accepted: 01/21/2020] [Indexed: 11/14/2022] Open
Abstract
Four new heteroleptic silver(I) complexes with the general formula [Ag(L1-4)(nap)] (1-4), where L1-4 = 2-(1-(4-substitutedphenyl)ethylidene)hydrazinecarbothioamide and nap = naproxen, have been synthesized and characterized. The geometric parameters determined from density functional theory and UV-Vis studies indicate distorted tetrahedral geometry around silver(I) ion. Fourier transform infrared (FT IR) spectra evidenced asymmetric bidentate coordination mode of carboxyl oxygen atoms of naproxen with silver(I) ion. The complexes are stable for 72 h and biocompatibility was analysed towards normal human dermal fibroblast cells, which showed non-toxic nature up to 100 ng/ml. In vitro anti-proliferative activity of the complexes by MTT assay was tested against three human cancerous cell lines and one non-tumorigenic human breast epithelial cell line (MCF-10a) in which the complex 4 exhibited enhanced activity. The morphological changes observed by acridine orange/ethidium bromide and Hoechst 33258 staining method reveal apoptosis-inducing ability of the complexes. The molecular docking studies suggest hydrogen bonding, hydrophobic and π-pair interactions with the active site of epidermal growth factor receptor, vascular endothelial growth factor receptor 2 and lipoxygenase receptors.
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Affiliation(s)
- Sundaram Bharathi
- Department of Chemistry, The New College (Autonomous), University of Madras, Chennai 600 014, India
| | - Dharmasivam Mahendiran
- Department of Chemistry, The New College (Autonomous), University of Madras, Chennai 600 014, India
- Molecular Pharmacology and Pathology Program, Department of Pathology, Bosch Institute, University of Sydney, Sydney 2006, Australia
| | - Raju Senthil Kumar
- Department of Pharmaceutical Chemistry, Swamy Vivekanandha College of Pharmacy, Elayampalayam, Tiruchengodu 637 205, India
| | - Hyo Jeong Choi
- Division of Bioengineering, School of Life Sciences and Bioengineering, Incheon National University, Incheon 22012, Republic of Korea
| | - Mani Gajendiran
- Department of Chemical and Biochemical Engineering, Dongguk University, Seoul 04620, Republic of Korea
| | - Kyobum Kim
- Department of Chemical and Biochemical Engineering, Dongguk University, Seoul 04620, Republic of Korea
| | - Aziz Kalilur Rahiman
- Department of Chemistry, The New College (Autonomous), University of Madras, Chennai 600 014, India
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Thakur S, Drew MGB, Franconetti A, Frontera A, Chattopadhyay S. Analysis of energies of halogen and hydrogen bonding interactions in the solid state structures of vanadyl Schiff base complexes. RSC Adv 2019; 9:4789-4796. [PMID: 35514651 PMCID: PMC9060597 DOI: 10.1039/c8ra09947b] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 01/21/2019] [Indexed: 01/04/2023] Open
Abstract
Two mononuclear and two dinuclear vanadium(v) complexes, [VO2L1] (1), [VO2L2] (2), (μ-O)2[V(O)(L3)]2 (3) and (μ-O)2[V(O)(L4)]2·2H2O (4), where HL1 = 4-bromo-6-[(2-phenylaminoethylimino)methyl]phenol, HL2 = 2-((2-(diethylamino)ethylimino)methyl)-4-chlorophenol, HL3 = 2-((2-(ethylamino)ethylimino)methyl)-4-chlorophenol and HL4 = 2-(1-(2-(ethylamino)ethylimino)ethyl)phenol have been synthesized and characterized. Structures of all complexes have been confirmed by single crystal X-ray diffraction studies. Complexes 1, 2, and 3 exhibit significant halogen bonding interactions in their solid state structures. The energies associated to the supramolecular interactions have been explored using Density Functional Theory (DFT) calculations, and further confirmed with non-covalent interaction (NCI) plots.
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Affiliation(s)
- Snehasish Thakur
- Department of Chemistry, Inorganic Section, Jadavpur University Kolkata 700 032 India
| | - Michael G B Drew
- School of Chemistry, The University of Reading P. O. Box 224, Whiteknights Reading RG6 6AD UK
| | - Antonio Franconetti
- Departament de Química, Universitat de les Illes Balears Crta. De Valldemossa km 7.5 07122 Palma Baleares Spain
| | - Antonio Frontera
- Departament de Química, Universitat de les Illes Balears Crta. De Valldemossa km 7.5 07122 Palma Baleares Spain
| | - Shouvik Chattopadhyay
- Department of Chemistry, Inorganic Section, Jadavpur University Kolkata 700 032 India
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17
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Mahendiran D, Kumar RS, Rahiman AK. Heteroleptic silver(I) complexes with 2,2′:6′,2″-terpyridines and naproxen: DNA interaction, EGFR/VEGFR2 kinase, growth inhibition and cell cycle arrest studies. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 76:601-615. [DOI: 10.1016/j.msec.2017.03.085] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 03/07/2017] [Accepted: 03/12/2017] [Indexed: 10/20/2022]
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18
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Xie MJ, Zhu MR, Lu CM, Jin Y, Gao LH, Li L, Zhou J, Li FF, Zhao QH, Liu HK, Sadler PJ, Sanchez-Cano C. Synthesis and characterization of oxidovanadium complexes as enzyme inhibitors targeting dipeptidyl peptidase IV. J Inorg Biochem 2017; 175:29-35. [PMID: 28692886 DOI: 10.1016/j.jinorgbio.2017.06.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 06/22/2017] [Accepted: 06/23/2017] [Indexed: 12/28/2022]
Abstract
Two oxidovanadium(IV) complexes carrying Schiff base ligands obtained from the condensation of 4,5-dichlorobenzene-1,2-diamine and salicylaldehyde derivatives were synthesised and characterised, including their X-ray crystallographic structures. They were evaluated as dipeptidyl peptidase IV (DPP-IV) inhibitors for the treatment of type 2 diabetes. These compounds were moderate inhibitors of DPP-IV, with IC50 values of ca. 40μM. In vivo tests showed that complexes 1 and 2 could lower significantly the level of glucose in the blood of alloxan-diabetic mice at doses of 22.5mgV·kg-1 and 29.6mgV·kg-1, respectively. Moreover, molecular modeling studies suggested that the oxidovanadium complexes 1 and 2 could fit well into the active-site cleft of the kinase domain of DPP-IV. To the best of our knowledge, this is the first report of vanadium complexes capable of inhibiting DPP-IV.
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Affiliation(s)
- Ming-Jin Xie
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, Yunnan, China.
| | - Ming-Rong Zhu
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, Yunnan, China
| | - Chun-Mei Lu
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, Yunnan, China
| | - Yi Jin
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, Yunnan, China
| | - Li-Hui Gao
- Biomedical Engineering Research Center, Kunming Medical University, Kunming 650500, Yunnan, China
| | - Ling Li
- Biomedical Engineering Research Center, Kunming Medical University, Kunming 650500, Yunnan, China
| | - Jie Zhou
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, Yunnan, China
| | - Fan-Fang Li
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, Yunnan, China
| | - Qi Hua Zhao
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, Yunnan, China
| | - Hong-Ke Liu
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Wenyuan Road 1, Nanjing 210023, China
| | - Peter J Sadler
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK.
| | - Carlos Sanchez-Cano
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK.
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19
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Theetharappan M, Subha L, Balakrishnan C, Neelakantan M. Binding interactions of mixed ligand copper(II) amino acid Schiff base complexes with biological targets: Spectroscopic evaluation and molecular docking. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.3713] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- M. Theetharappan
- Chemistry Research Centre; National Engineering College; K. R. Nagar, Kovilpatti - 628 503 Thoothukudi District Tamil Nadu India
| | - L. Subha
- Chemistry Research Centre; National Engineering College; K. R. Nagar, Kovilpatti - 628 503 Thoothukudi District Tamil Nadu India
| | - C. Balakrishnan
- Chemistry Research Centre; National Engineering College; K. R. Nagar, Kovilpatti - 628 503 Thoothukudi District Tamil Nadu India
| | - M.A. Neelakantan
- Chemistry Research Centre; National Engineering College; K. R. Nagar, Kovilpatti - 628 503 Thoothukudi District Tamil Nadu India
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20
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Yang XF, Liu M, Zhu HB, Hang C, Zhao Y. Syntheses, structures, and magnetic properties of two unique Cu(ii)-based coordination polymers involving a crystal-to-crystal structural transformation from a 1D chain to a 3D network. Dalton Trans 2017; 46:17025-17031. [DOI: 10.1039/c7dt03568c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Promoted by the DMF solvent, the 1D chain structure of 1 can be irreversibly transformed into the 3D sod network structure of 2 in a crystal-to-crystal fashion, which is accompanied by a drastic magnetic change.
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Affiliation(s)
- Xu-Feng Yang
- School of Chemistry and Chemical Engineering
- Southeast University
- Nanjing 211189
- China
| | - Min Liu
- School of Chemistry and Chemical Engineering
- Southeast University
- Nanjing 211189
- China
| | - Hai-Bin Zhu
- School of Chemistry and Chemical Engineering
- Southeast University
- Nanjing 211189
- China
| | - Cheng Hang
- Coordination Chemistry Institute
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing National Laboratory of Microstructures
- Nanjing University
| | - Yue Zhao
- Coordination Chemistry Institute
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing National Laboratory of Microstructures
- Nanjing University
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21
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Singh YP, Patel RN, Singh Y, Butcher RJ, Vishakarma PK, Singh RB. Structure and antioxidant superoxide dismutase activity of copper(II) hydrazone complexes. Polyhedron 2017. [DOI: 10.1016/j.poly.2016.11.013] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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22
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Singh YP, Patel RN, Singh Y, Choquesillo-Lazarte D, Butcher RJ. Classical hydrogen bonding and stacking of chelate rings in new copper(ii) complexes. Dalton Trans 2017; 46:2803-2820. [DOI: 10.1039/c6dt04661d] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Three new copper(ii) complexes, viz., [Cu(L)(NO3)(H2O)]H2O 1, [Cu(L)(H2O)2]NO32 and [Cu2(L)2(pyrazine)](ClO4)2·4H2O 3, were prepared using a biomimetic synthesis strategy [HL = 4-chloro-2-{(E)-[2-(pyridin-2-yl)hydrazinylidene]methyl}phenol]. In complex 3, stacking of chelates rings was observed.
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Affiliation(s)
| | - Ram N. Patel
- Department of Chemistry
- A. P. S. University
- Rewa
- 486003
- India
| | - Yogendra Singh
- Department of Chemistry
- A. P. S. University
- Rewa
- 486003
- India
| | | | - R. J. Butcher
- Department of Inorganic & Structural Chemistry
- Howard University
- Washington DC
- 22031 USA
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23
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Muralisankar M, Sujith S, Bhuvanesh NS, Sreekanth A. Synthesis and crystal structure of new monometallic and bimetallic copper(II) complexes with N-substituted isatin thiosemicarbazone ligands: Effects of the complexes on DNA/protein-binding property, DNA cleavage study and in vitro anticancer activity. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.06.017] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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24
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Kober E, Janas Z, Jezierska J. Oxidation of 1-Methyl-1-phenylhydrazine with Oxidovanadium(V)–Salan Complexes: Insight into the Pathway to the Formation of Hydrazine by Vanadium Nitrogenase. Inorg Chem 2016; 55:10888-10898. [DOI: 10.1021/acs.inorgchem.6b01283] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Ewa Kober
- Faculty of Chemistry, University of Wrocław, 14, F. Joliot-Curie, 50-383 Wrocław, Poland
| | - Zofia Janas
- Faculty of Chemistry, University of Wrocław, 14, F. Joliot-Curie, 50-383 Wrocław, Poland
| | - Julia Jezierska
- Faculty of Chemistry, University of Wrocław, 14, F. Joliot-Curie, 50-383 Wrocław, Poland
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25
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Naso LG, Lezama L, Valcarcel M, Salado C, Villacé P, Kortazar D, Ferrer EG, Williams PAM. Bovine serum albumin binding, antioxidant and anticancer properties of an oxidovanadium(IV) complex with luteolin. J Inorg Biochem 2016; 157:80-93. [PMID: 26828287 DOI: 10.1016/j.jinorgbio.2016.01.021] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 01/16/2016] [Accepted: 01/18/2016] [Indexed: 10/22/2022]
Abstract
Chemotherapy using metal coordination compounds for cancer treatment is the work of the ongoing research. Continuing our research on the improvement of the anticancer activity of natural flavonoids by metal complexation, a coordination compound of the natural antioxidant flavone luteolin (lut) and the oxidovanadium(IV) cation has been synthesized and characterized. Using different physicochemical measurements some structural aspects of [VO(lut)(H2O)2]Na·3H2O (VOlut) were determined. The metal coordinated to two cis-deprotonated oxygen atoms (ArO(-)) of the ligand and two H2O molecules. Magnetic measurements in solid state indicated the presence of an effective exchange pathway between adjacent vanadium ions. VOlut improved the antioxidant capacity of luteolin only against hydroxyl radical. The antitumoral effects were evaluated on MDAMB231 breast cancer and A549 lung cancer cell lines. VOlut exhibited higher viability inhibition (IC50=17 μM) than the ligand on MDAMB231 cells but they have the same behavior on A549 cells (ca. IC50=60 μM). At least oxidative stress processes were active during cancer cell-killing. When metals chelated through the carbonyl group and one adjacent OH group of the flavonoid an effective improvement of the biological properties has been observed. In VOlut the different coordination may be the cause of the small improvement of some of the tested properties of the flavonoid. Luteolin and VOlut could be distributed and transported in vivo. Luteolin interacted in the microenvironment of the tryptophan group of the serum binding protein, BSA, by means of electrostatic forces and its complex bind the protein by H bonding and van der Waals interactions.
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Affiliation(s)
- Luciana G Naso
- Centro de Química Inorgánica (CEQUINOR, CONICET, UNLP), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115-C.C.962-(B1900AVV), 1900 La Plata, Argentina
| | - Luis Lezama
- Departamento de Química Inorgánica, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, P.O. Box 644, 48080 Bilbao, Spain; BCMaterials, Parque científico y Tecnológico de Bizkaia, Edificio 500-1, 48160 Derio, Spain
| | - María Valcarcel
- Innoprot SL, Parque científico y Tecnológico de Bizkaia, Edificio 502-P1, 48160 Derio, Spain
| | - Clarisa Salado
- Innoprot SL, Parque científico y Tecnológico de Bizkaia, Edificio 502-P1, 48160 Derio, Spain
| | - Patricia Villacé
- Innoprot SL, Parque científico y Tecnológico de Bizkaia, Edificio 502-P1, 48160 Derio, Spain
| | - Danel Kortazar
- Innoprot SL, Parque científico y Tecnológico de Bizkaia, Edificio 502-P1, 48160 Derio, Spain
| | - Evelina G Ferrer
- Centro de Química Inorgánica (CEQUINOR, CONICET, UNLP), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115-C.C.962-(B1900AVV), 1900 La Plata, Argentina
| | - Patricia A M Williams
- Centro de Química Inorgánica (CEQUINOR, CONICET, UNLP), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115-C.C.962-(B1900AVV), 1900 La Plata, Argentina.
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26
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A new oxovanadium(IV) complex containing an O,N-bidentate Schiff base ligand: Synthesis at ambient temperature, characterization, crystal structure and catalytic performance in selective oxidation of sulfides to sulfones using H2O2 under solvent-free conditions. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2015.08.060] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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27
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Hilbert J, Kabus S, Näther C, Bensch W. Crystal structure of tris-(N-methyl-salicyl-aldiminato-κ(2) N,O)chromium(III). Acta Crystallogr E Crystallogr Commun 2015; 71:m247-8. [PMID: 26870448 PMCID: PMC4719857 DOI: 10.1107/s2056989015023038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 12/01/2015] [Indexed: 11/10/2022]
Abstract
The crystal structure of the title compound, [Cr(C8H8NO)3], is isotypic with the vanadium(III) analogue. The asymmetric unit consists of one Cr(3+) cation and three N-methyl-salicylaldiminate anions. The metal cation is octa-hedrally coordinated by three N,O-chelating N-methyl-salicylaldiminate ligands, leading to discrete and neutral complexes. In the crystal, neighbouring complexes are linked via C-H⋯O hydrogen-bonding inter-actions into chains propagating parallel to the c axis.
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Affiliation(s)
- Jessica Hilbert
- Institute of Inorganic Chemistry, Christian-Albrechts-University of Kiel, Max-Eyth-Strasse 2, 24118 Kiel, Germany
| | - Sven Kabus
- Institute of Inorganic Chemistry, Christian-Albrechts-University of Kiel, Max-Eyth-Strasse 2, 24118 Kiel, Germany
| | - Christian Näther
- Institute of Inorganic Chemistry, Christian-Albrechts-University of Kiel, Max-Eyth-Strasse 2, 24118 Kiel, Germany
| | - Wolfgang Bensch
- Institute of Inorganic Chemistry, Christian-Albrechts-University of Kiel, Max-Eyth-Strasse 2, 24118 Kiel, Germany
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28
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Maurya R, Malik B, Mir J, Sharma A. Synthesis, characterization, thermal behavior, and DFT aspects of some oxovanadium(IV) complexes involving ONO-donor sugar Schiff bases. J COORD CHEM 2014. [DOI: 10.1080/00958972.2014.959508] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- R.C. Maurya
- Coordination and Bioinorganic Chemistry Laboratory, Department of P.G. Studies and Research in Chemistry and Pharmacy, R.D. University, Jabalpur, India
| | - B.A. Malik
- Coordination and Bioinorganic Chemistry Laboratory, Department of P.G. Studies and Research in Chemistry and Pharmacy, R.D. University, Jabalpur, India
| | - J.M. Mir
- Coordination and Bioinorganic Chemistry Laboratory, Department of P.G. Studies and Research in Chemistry and Pharmacy, R.D. University, Jabalpur, India
| | - A.K. Sharma
- Coordination and Bioinorganic Chemistry Laboratory, Department of P.G. Studies and Research in Chemistry and Pharmacy, R.D. University, Jabalpur, India
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29
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von Willingh G, Abbo HS, Titinchi SJ. Selective oxidation reactions over tri- and tetradentate oxovanadium(IV) complexes encapsulated in zeolite-Y. Catal Today 2014. [DOI: 10.1016/j.cattod.2013.09.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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30
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Thermodynamic, spectroscopic and DFT description of oxidovanadium(IV) complexes with malate and tartrate in aqueous solution. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.01.043] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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31
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Cramer SA, Sturgill FL, Chandrachud PP, Jenkins DM. Overcoming NHCs neutrality: installing tetracarbenes on group 13 and 14 metals. Dalton Trans 2014; 43:7687-90. [DOI: 10.1039/c4dt00990h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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32
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Dikanov SA, Liboiron BD, Orvig C. VO 2+-hydroxyapatite complexes as models for vanadyl coordination to phosphate in bone. Mol Phys 2013; 111:2967-2979. [PMID: 24829511 PMCID: PMC4016957 DOI: 10.1080/00268976.2013.796412] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
We describe a 1D and 2D ESEEM investigation of VO2+ adsorbed on hydroxyapatite (HA) at different concentrations and compare with VO2+-triphosphate (TPH) complexes studied previously in detail, in an effort to provide more insight into the structure of VO2+coordination in bone. Structures of this interaction are important because of the role of bone in the long-term storage of administered vanadium, and the likely role of bone in the steady-state release of vanadium leading to the chronic insulin-enhancing anti-diabetic effects of vanadyl complexes. Three similar sets of cross-peaks from phosphorus nuclei observed in the 31P HYSCORE spectra of VO2+-HA, VO2+-TPH, and VO2+-bone suggest a common tridentate binding motif for triphosphate moieties to the vanadyl ion. The similarities between the systems present the possibility that in vivo vanadyl coordination in bone is relatively uniform. Experiments with HA samples containing different amounts of adsorbed VO2+ demonstrate additional peculiarities of the ion-adsorbent interaction which can be expected in vivo. HYSCORE spectra of HA samples show varying relative intensities of 31P lines from phosphate ligands and 1H lines, especially lines from protons of coordinated water molecules. This result suggests that the number of equatorial phosphate ligands in HA could be different depending on the water content of the sample and the VO2+ concentration; complexes of different structure probably contribute to the spectra of VO2+-HA. Similar behavior can be also expected in vivo during VO2+ accumulation in bones.
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Affiliation(s)
- Sergei A Dikanov
- Department of Veterinary Clinical Medicine, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Barry D Liboiron
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada, V6T 1Z1, and Faculty of Pharmaceutical Sciences, University of British Columbia, 2146 Main Mall, Vancouver, BC, Canada, V6T 1Z3
| | - Chris Orvig
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada, V6T 1Z1, and Faculty of Pharmaceutical Sciences, University of British Columbia, 2146 Main Mall, Vancouver, BC, Canada, V6T 1Z3
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33
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Stinghen D, Ferreira JG, Nunes GG, Soares JF. A new ring-like arrangement of vanadyl(IV) groups bridged by monodentate alkoxides: cyclo-decakis(μ-cyclohexylmethanolato)pentakis[oxidovanadium(IV)]. Acta Crystallogr C 2012; 68:m353-5. [PMID: 23221246 DOI: 10.1107/s0108270112045702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Accepted: 11/05/2012] [Indexed: 11/10/2022] Open
Abstract
The pentanuclear title compound, [V(5)(C(7)H(13)O)(10)O(5)], has a metal-oxygen core that consists of five vanadyl(IV) centres bridged by the O atoms of cyclohexylmethanolate ligands. This particular ring topology is new to oxovanadium(IV) chemistry and resembles the structure proposed for [V(5)O(15)](5-) on the basis of (51)V NMR studies in aqueous solution. The bulky cyclohexylmethanolate ligands adopt chair-like conformations and project outwards from the central cyclic core. The title compound crystallizes in a centrosymmetric triclinic unit cell, which contains four independent but chemically identical molecules in the asymmetric unit. The crystal structure is devoid of any significant intermolecular interactions.
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Affiliation(s)
- Danilo Stinghen
- Departamento de Química, Universidade Federal do Paraná, Centro Politécnico, Jardim das Américas, Curitiba PR, Brazil
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34
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Adão P, Kuznetsov ML, Barroso S, Martins AM, Avecilla F, Pessoa JC. Amino Alcohol-Derived Reduced Schiff Base VIVO and VV Compounds as Catalysts for Asymmetric Sulfoxidation of Thioanisole with Hydrogen Peroxide. Inorg Chem 2012; 51:11430-49. [DOI: 10.1021/ic301153p] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pedro Adão
- Centro Química Estrutural,
Instituto Superior Técnico, Universidade Técnica de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Maxim L. Kuznetsov
- Centro Química Estrutural,
Instituto Superior Técnico, Universidade Técnica de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Sónia Barroso
- Centro Química Estrutural,
Instituto Superior Técnico, Universidade Técnica de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Ana M. Martins
- Centro Química Estrutural,
Instituto Superior Técnico, Universidade Técnica de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
| | - F. Avecilla
- Departamento de
Química Fundamental, Universidade da Coruña, Campus de A Zapateira, 15071 A Coruña,
Spain
| | - João Costa Pessoa
- Centro Química Estrutural,
Instituto Superior Técnico, Universidade Técnica de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
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35
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Sanna D, Ugone V, Micera G, Garribba E. Temperature and solvent structure dependence of VO2+ complexes of pyridine-N-oxide derivatives and their interaction with human serum transferrin. Dalton Trans 2012; 41:7304-18. [PMID: 22576640 DOI: 10.1039/c2dt12503j] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The behaviour of the systems formed by VO(2+), 2-hydroxypyridine-N-oxide (Hhpo) and 2-mercaptopyridine-N-oxide (Hmpo) was studied both in solution and in the solid state through the combined application of spectroscopic (EPR and UV-Vis spectroscopy) and DFT methods. The geometry of solid bis-chelated complexes [VOL(2)], with L = hpo and mpo, is square pyramidal, but it can change to cis-[VOL(2)S], where S is a solvent molecule, when these are dissolved in a coordinating solvent. The equilibrium between the square pyramidal and cis-octahedral forms is strongly affected by solvent and temperature. At room temperature, the predominant species is [VOL(2)], which gives a pink colour to the solutions; at lower temperatures, the equilibrium is shifted--partially or completely--toward the formation of cis-[VOL(2)S], which is green. In an acidic environment and in the presence of an excess of ligand, [VOL(2)] can transform into the tris-chelated complex [VL(3)](+), in which vanadium loses the oxido ligand and adopts a hexa-coordinated geometry intermediate between octahedral and trigonal prismatic. 1-Methylimidazole (1-MeIm), which represents a model for His-N coordination, forms mixed complexes with stoichiometry cis-[VOL(2)(1-MeIm)], occupying an equatorial position. In the ternary systems VO(2+)-Hhpo-hTf and VO(2+)-Hmpo-hTf at room temperature and pH 7.4, besides (VO)hTf and (VO)(2)hTf, the mixed species cis-VO(hpo)(2)(hTf) and VO(mpo)(hTf) are observed, with the equatorial binding of an accessible histidine residue. Finally, the contribution of the N-oxide group to (51)V A(z) and A(iso) hyperfine coupling constants, which can be important in the characterisation of similar species, is discussed.
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Affiliation(s)
- Daniele Sanna
- Istituto CNR di Chimica Biomolecolare, Trav. La Crucca 3, I-07040 Sassari, Italy
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Achard TR, Clegg W, Harrington RW, North M. Chiral salen ligands designed to form polymetallic complexes. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.10.084] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Sanna D, Varnágy K, Timári S, Micera G, Garribba E. VO2+ Complexation by Bioligands Showing Keto–Enol Tautomerism: A Potentiometric, Spectroscopic, and Computational Study. Inorg Chem 2011; 50:10328-41. [DOI: 10.1021/ic201392d] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Daniele Sanna
- Istituto CNR di Chimica Biomolecolare, Trav. La Crucca 3, I-07040 Sassari, Italy
| | - Katalin Varnágy
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4010 Debrecen, Hungary
| | - Sarolta Timári
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4010 Debrecen, Hungary
| | - Giovanni Micera
- Dipartimento di Chimica e Centro Interdisciplinare per lo Sviluppo della Ricerca Biotecnologica e per lo Studio della Biodiversità della Sardegna, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy
| | - Eugenio Garribba
- Dipartimento di Chimica e Centro Interdisciplinare per lo Sviluppo della Ricerca Biotecnologica e per lo Studio della Biodiversità della Sardegna, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy
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Micera G, Garribba E. The Effect of Trigonal Bipyramidal Distortion of Pentacoordinate VIVO2+ Species on their Structural, Electronic and Spectroscopic Parameters. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100422] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Matsuoka N, Tsuchimoto M, Yoshioka N. Theoretical Study of Magnetic Properties of Oxovanadium(IV) Complex Self-Assemblies with Tetradentate Schiff Base Ligands. J Phys Chem B 2011; 115:8465-73. [DOI: 10.1021/jp111779k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Naoki Matsuoka
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi 3-14-1, Kohoku-ku, Yokohama 223-8522, Japan
| | - Masanobu Tsuchimoto
- Department of Chemistry, Faculty of Engineering, Chiba Institute of Technology, Shibazono 2-1-1, Narashino, Chiba 275-0023, Japan
| | - Naoki Yoshioka
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi 3-14-1, Kohoku-ku, Yokohama 223-8522, Japan
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Lodyga-Chruscinska E, Micera G, Garribba E. Complex Formation in Aqueous Solution and in the Solid State of the Potent Insulin-Enhancing VIVO2+ Compounds Formed by Picolinate and Quinolinate Derivatives. Inorg Chem 2011; 50:883-99. [DOI: 10.1021/ic101475x] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Elzbieta Lodyga-Chruscinska
- Institute of General Food Chemistry, Technical University of Lodz, ul. Stefanowskiego 4/10, PL-90924, Lodz, Poland
| | - Giovanni Micera
- Dipartimento di Chimica e Centro Interdisciplinare per lo Sviluppo della Ricerca Biotecnologica e per lo Studio della Biodiversità della Sardegna, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy
| | - Eugenio Garribba
- Dipartimento di Chimica e Centro Interdisciplinare per lo Sviluppo della Ricerca Biotecnologica e per lo Studio della Biodiversità della Sardegna, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy
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Carter E, Fallis IA, Kariuki BM, Morgan IR, Murphy DM, Tatchell T, Van Doorslaer S, Vinck E. Structure and pulsed EPR characterization of N,N′-bis(5-tert-butylsalicylidene)-1,2-cyclohexanediamino-vanadium(iv) oxide and its adducts with propylene oxide. Dalton Trans 2011; 40:7454-62. [DOI: 10.1039/c1dt10378d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kasumov VT, Köksal F, Aslanoglu M, Yerli Y. Synthesis, spectroscopic characterization and reactivity studies of oxovanadium(IV) complexes with bulky N,N'-polymethylenebis(3,5-(t)Bu(2)salicylaldimine) ligands. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2010; 77:630-637. [PMID: 20674475 DOI: 10.1016/j.saa.2010.06.040] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2010] [Revised: 06/11/2010] [Accepted: 06/24/2010] [Indexed: 05/29/2023]
Abstract
A series of new sterically hindered N,N'-polymethylenebis(3,5-(t)Bu(2)salicylaldimine) ligands (H(2)L(x)) VO(IV) complexes, [VO{(2-O-3,5-(t)Bu(2)C(6)H(2))CHN-R-NCH-(3,5-(t)Bu(2)-C(6)H(2)O-2)] (X), where R=-(CH(2))(3)- (3), -(CH(2))(4)- (4), -(CH(2))(5)- (5), -(CH(2))(6)- (6) and -CH(2)C(CH(3))(2)CH(2)- (7) and early reported -(CH(2))(2)- (1) and -CH(2)CH(CH(3))- (2), has been synthesized and characterized by spectroscopic (IR, UV/vis, (1)H NMR, EPR), electrochemical and magnetic susceptibility measurements. Complexes 1-7 are described a trigonal distorted pyramids. All seven compounds give nearly the same parallel hyperfine coupling constant (A(z)) regardless that the geometry of VO(IV) changes from square pyramidal to trigonal distorted pyramids. Chemical oxidation of 1-7 by one equiv Ce(IV) leads to the formation of stable [VO(V)L(x)](+) complexes. Cyclic voltammograms of 2-6 in DMSO along with a quasi-reversible VO(IV)/VO(V) redox couple also showed irreversible phenolate/phenoxyl responses. Each 1 and 7 shows only one reversible VO(IV) centered oxidation waves. Chemical oxidation of H(2)L(x) forms the stable [H(2)L(x)](+) radical species.
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Affiliation(s)
- Veli T Kasumov
- Department of Chemistry, Harran University, Osmanbey, Sanliurfa, Turkey.
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de Lima SM, Gómez JA, Barros VP, Vertuan GDS, Assis MDD, Graeff CFDO, Demets GJF. A new oxovanadium(IV)–cucurbit[6]uril complex: Properties and potential for confined heterogeneous catalytic oxidation reactions. Polyhedron 2010. [DOI: 10.1016/j.poly.2010.08.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Wu JQ, Li BX, Zhang SW, Li YS. Bis(β-enaminoketonato) vanadium (III or IV) complexes as catalysts for olefin polymerization. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.24084] [Citation(s) in RCA: 20] [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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45
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Xie MJ, Li L, Yang XD, Liu WP, Yan SP, Niu YF, Meng ZH. A new insulin-enhancing agent: [N,N′-bis(4-hydroxysalicylidene)-o-phenylene-diamine]oxovanadium(IV) and its permeability and cytotoxicity. Eur J Med Chem 2010; 45:2327-35. [DOI: 10.1016/j.ejmech.2010.02.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2009] [Revised: 01/29/2010] [Accepted: 02/02/2010] [Indexed: 10/19/2022]
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Gourier D, Delpoux O, Bonduelle A, Binet L, Ciofini I, Vezin H. EPR, ENDOR, and HYSCORE Study of the Structure and the Stability of Vanadyl−Porphyrin Complexes Encapsulated in Silica: Potential Paramagnetic Biomarkers for the Origin of Life. J Phys Chem B 2010; 114:3714-25. [DOI: 10.1021/jp911728e] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Didier Gourier
- Laboratoire de Chimie de la Matière Condensée de Paris, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech) and Université Pierre et Marie Curie, UMR-CNRS 7574, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, Laboratoire d’Electrochimie, Chimie des Interfaces et Modélisation pour l’Energie, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech), UMR-CNRS 7575, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, and Laboratoire de Spectrochimie Infrarouge et
| | - Olivier Delpoux
- Laboratoire de Chimie de la Matière Condensée de Paris, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech) and Université Pierre et Marie Curie, UMR-CNRS 7574, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, Laboratoire d’Electrochimie, Chimie des Interfaces et Modélisation pour l’Energie, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech), UMR-CNRS 7575, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, and Laboratoire de Spectrochimie Infrarouge et
| | - Audrey Bonduelle
- Laboratoire de Chimie de la Matière Condensée de Paris, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech) and Université Pierre et Marie Curie, UMR-CNRS 7574, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, Laboratoire d’Electrochimie, Chimie des Interfaces et Modélisation pour l’Energie, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech), UMR-CNRS 7575, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, and Laboratoire de Spectrochimie Infrarouge et
| | - Laurent Binet
- Laboratoire de Chimie de la Matière Condensée de Paris, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech) and Université Pierre et Marie Curie, UMR-CNRS 7574, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, Laboratoire d’Electrochimie, Chimie des Interfaces et Modélisation pour l’Energie, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech), UMR-CNRS 7575, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, and Laboratoire de Spectrochimie Infrarouge et
| | - Ilaria Ciofini
- Laboratoire de Chimie de la Matière Condensée de Paris, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech) and Université Pierre et Marie Curie, UMR-CNRS 7574, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, Laboratoire d’Electrochimie, Chimie des Interfaces et Modélisation pour l’Energie, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech), UMR-CNRS 7575, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, and Laboratoire de Spectrochimie Infrarouge et
| | - Hervé Vezin
- Laboratoire de Chimie de la Matière Condensée de Paris, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech) and Université Pierre et Marie Curie, UMR-CNRS 7574, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, Laboratoire d’Electrochimie, Chimie des Interfaces et Modélisation pour l’Energie, Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech), UMR-CNRS 7575, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France, and Laboratoire de Spectrochimie Infrarouge et
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Hyperfine and Quadrupolar Interactions in Vanadyl Proteins and Model Complexes: Theory and Experiment. METALS IN BIOLOGY 2010. [DOI: 10.1007/978-1-4419-1139-1_11] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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Goldberg H, Kaminker I, Goldfarb D, Neumann R. Oxidation of Carbon Monoxide Cocatalyzed by Palladium(0) and the H5PV2Mo10O40 Polyoxometalate Probed by Electron Paramagnetic Resonance and Aerobic Catalysis. Inorg Chem 2009; 48:7947-52. [DOI: 10.1021/ic900868t] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hila Goldberg
- Department of Organic Chemistry
- Department of Chemical Physics
- Weizmann Institute of Science, Rehovot, Israel 76100
| | - Ilia Kaminker
- Department of Organic Chemistry
- Department of Chemical Physics
- Weizmann Institute of Science, Rehovot, Israel 76100
| | - Daniella Goldfarb
- Department of Organic Chemistry
- Department of Chemical Physics
- Weizmann Institute of Science, Rehovot, Israel 76100
| | - Ronny Neumann
- Department of Organic Chemistry
- Department of Chemical Physics
- Weizmann Institute of Science, Rehovot, Israel 76100
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Zhang SH, Tang MF, Ge CM. Microwave Synthesis, Crystal Structure and Magnetic Behavior of a Schiff Base Trinuclear Nickel Cluster. Z Anorg Allg Chem 2009. [DOI: 10.1002/zaac.200801402] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Soshnikov IE, Semikolenova NV, Bryliakov KP, Shubin AA, Zakharov VA, Redshaw C, Talsi EP. An EPR Study of the V(IV) Species Formed Upon Activation of a Vanadyl Phenoxyimine Polymerization Catalyst with AlR3and AlR2Cl (R = Me, Et). MACROMOL CHEM PHYS 2009. [DOI: 10.1002/macp.200800556] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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