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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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2
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Patel AK, Jadeja RN, Patel N, Patel RN, Patel SK, Butcher R, Kumar S, Kumar G. Copper(II) hydrazone complexes derived from (Z)-N′-{(2-hydroxynapthalen-1-yl}methylene)acetohydrazide: Synthesis, spectral characterization, electrochemical behaviour, density functional study, in vitro catalytic activity and molecular docking. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2021.100244] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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3
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Patel SK, Patel RN, Patel AK, Patel N, Coloma I, Cortijo M, Herrero S, Choquesillo-Lazarte D. Synthesis, single crystal structures, DFT and in vitro anti oxidant superoxide dismutase studies of copper(II) complexes derived from the di-(2-picolyl)amine and co-ligands: Promising antioxidants. Polyhedron 2022. [DOI: 10.1016/j.poly.2021.115609] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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4
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Patel AK, Jadeja RN, Butcher R, Kumar A. Mononuclear copper(II) complexes with (Z)-N′-{(2-hydroxynapthalen-1-yl}methylene)acetohydrazide: X-ray single-crystal structures, Hirshfeld analysis, X-band epr spectra, DFT calculations and SOD mimetic activity. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2021.120489] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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5
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Singh Y, Patel RN, Patel SK, Jadeja R, Patel AK, Patel N, Roy H, Kumar P, Butcher R, Jasinski JP, Cortijo M, Herrero S. Non-covalent interactions governing the supramolecular assembly of copper(II) complexes with hydrazone-type ligand: Experimental and quantum chemical study. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115142] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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6
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Shamle NJ, Tella AC, Whitwood AC, Ashafa AO, Ajibade PA. Synthesis, characterization, electrochemistry, antioxidant, and toxicological studies of Co(II), Ni(II) and Ag(I) complexes of mefenamic acid/tolfenamic acid bearing metronidazole. J COORD CHEM 2021. [DOI: 10.1080/00958972.2021.1896713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
| | | | | | - Anofi O.T. Ashafa
- Phytomedicine and Phytopharmacology Research Group, Department of Plant Sciences, University of the Free State, QwaQwa Campus. Private Bag X13, Phuthaditjhaba, South Africa
| | - Peter A. Ajibade
- School of Chemistry and Physics, University of Kwazulu-Natal, Scottsville, Pietermaritzburg, South Africa
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7
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Patel AK, Jadeja RN, Butcher R, Kesharwani MK, Kästner J, Muddassir M. New copper(II) complexes with (Z)-N′-{(2-hydroxynaphthalen-1-yl}methylene)acetohydrazide]: X-ray structure, Hirshfeld analysis, X-band electron paramagnetic resonance spectra, TD-DFT calculations and superoxide dismutase mimetic activity. Polyhedron 2021. [DOI: 10.1016/j.poly.2020.114969] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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8
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Wu T, MacMillan SN, Rajabimoghadam K, Siegler MA, Lancaster KM, Garcia-Bosch I. Structure, Spectroscopy, and Reactivity of a Mononuclear Copper Hydroxide Complex in Three Molecular Oxidation States. J Am Chem Soc 2020; 142:12265-12276. [PMID: 32531159 DOI: 10.1021/jacs.0c03867] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Structural, spectroscopic, and reactivity studies are presented for an electron transfer series of copper hydroxide complexes supported by a tridentate redox-active ligand. Single crystal X-ray crystallography shows that the mononuclear [CuOH]1+ core is stabilized via intramolecular H-bonds between the H-donors of the ligand and the hydroxide anion when the ligand is in its trianionic form. This complex undergoes two reversible oxidation processes that produce two metastable "high-valent" CuOH species, which can be generated by addition of stoichiometric amounts of 1e- oxidants. These CuOH species are characterized by an array of spectroscopic techniques including UV-vis absorption, electron paramagnetic resonance (EPR), and X-ray absorption spectroscopies (XAS), which together indicate that all redox couples are ligand-localized. The reactivity of the complexes in their higher oxidation states toward substrates with modest O-H bond dissociation energies (e.g., 4-substitued-2,6-di-tert-butylphenols) indicates that these complexes act as 2H+/2e- oxidants, differing from the 1H+/1e- reactivity of well-studied [CuOH]2+ systems.
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Affiliation(s)
- Tong Wu
- Department of Chemistry, Southern Methodist University, Dallas, Texas 75275, United States
| | - Samantha N MacMillan
- Department of Chemistry and Chemical Biology, Cornell University, Baker Laboratory, Ithaca, New York 14853, United States
| | | | - Maxime A Siegler
- Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Kyle M Lancaster
- Department of Chemistry and Chemical Biology, Cornell University, Baker Laboratory, Ithaca, New York 14853, United States
| | - Isaac Garcia-Bosch
- Department of Chemistry, Southern Methodist University, Dallas, Texas 75275, United States
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9
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Bhatt BS, Gandhi DH, Vaidya FU, Pathak C, Patel TN. Cell apoptosis induced by ciprofloxacin based Cu(II) complexes: cytotoxicity, SOD mimic and antibacterial studies. J Biomol Struct Dyn 2020; 39:4555-4562. [PMID: 32476567 DOI: 10.1080/07391102.2020.1776641] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The current cancer research focuses on the design and synthesis of chemical compounds that can modulate cell apoptosis or programmed cell death. So we synthesized and characterized ciprofloxacin based copper(II) complexes and studied their anticancer activity against HCT 116 cancer cells by MTT assay. We further investigated the influence of compound-2 (better IC50 value than cisplatin) on cancer cells to know the exact mechanism of anticancer activity. The distinct morphological change of cells due to compound-2 was observed in bright field microscopy. The trypan blue assay clearly demonstrated inhibition of cell viability. The clonogenic ability inhibition assay showed a low percentage of the plating efficiency of HCT 116 cells. The mechanism of cell death, either apoptotic or necrotic was distinguished by annexin V-FITC/PI (propidium iodide) staining assay and LDH (lactate dehydrogenase) release assay. The positive annexinV/PI cells in presence of compound-2 and absence of LDH in the LDH release assay confirmed the cell apoptotic mechanism of cell death. We also checked in vitro antibacterial activity of compounds against Gram(-ve) and Gram(+ve) bacteria in terms of MIC (minimum inhibitory concentration) and the data were in good agreement with the standard drug data. SOD mimic activity of synthesized Cu(II) complexes was also studied in terms of IC50 value. The brine shrimp lethality bioassay was also performed to evaluate the cytotoxic properties of the Cu(II) complexes.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Bhupesh S Bhatt
- Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar, India
| | - Divyang H Gandhi
- Department of Chemistry, C. U. Shah University, Wadhwancity, India
| | - Foram U Vaidya
- Department of Cell Biology, School of Biological Sciences and Biotechnology, Indian Institute of Advanced Research, Gandhinagar, India
| | - Chandramani Pathak
- Department of Cell Biology, School of Biological Sciences and Biotechnology, Indian Institute of Advanced Research, Gandhinagar, India
| | - Tushar N Patel
- Department of Chemistry, C. U. Shah University, Wadhwancity, India
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10
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Squarcina A, Santoro A, Hickey N, De Zorzi R, Carraro M, Geremia S, Bortolus M, Di Valentin M, Bonchio M. Neutralization of Reactive Oxygen Species at Dinuclear Cu(II)-Cores: Tuning the Antioxidant Manifold in Water by Ligand Design. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01955] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
| | | | - Neal Hickey
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Rita De Zorzi
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | | | - Silvano Geremia
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy
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11
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Tang X, Qu Y, Wang C, Wu Y, Zhao K, Wu H. Synthesis, structure, and antioxidative properties of a copper(II) complex with 1,2‐bis(benzimidazol‐2‐yl)ethane ligand. J CHIN CHEM SOC-TAIP 2019. [DOI: 10.1002/jccs.201900189] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xia Tang
- School of Chemical and Biological EngineeringLanzhou Jiaotong University Lanzhou People's Republic of China
| | - Yao Qu
- School of Chemical and Biological EngineeringLanzhou Jiaotong University Lanzhou People's Republic of China
| | - Cong Wang
- School of Chemical and Biological EngineeringLanzhou Jiaotong University Lanzhou People's Republic of China
| | - Yancong Wu
- School of Chemical and Biological EngineeringLanzhou Jiaotong University Lanzhou People's Republic of China
| | - Kun Zhao
- School of Chemical and Biological EngineeringLanzhou Jiaotong University Lanzhou People's Republic of China
| | - Huilu Wu
- School of Chemical and Biological EngineeringLanzhou Jiaotong University Lanzhou People's Republic of China
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12
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Synthesis, structures and properties of copper(II) and zinc(II) complexes with 1,2-bis(benzimidazol-2-yl)ethane ligands. TRANSIT METAL CHEM 2019. [DOI: 10.1007/s11243-019-00340-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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13
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Wang C, Qu Y, Wu Y, Shen K, Zhao K, Li C, Huang G, Han X, Wu H. A new cuprous coordinating polymer constructed by bridging 2,2-(1,4-butanediyl)bis-1,3-benzoxazole ligand: synthesis, structure, and properties. J COORD CHEM 2019. [DOI: 10.1080/00958972.2019.1613648] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Cong Wang
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, People’s Republic of China
| | - Yao Qu
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, People’s Republic of China
| | - Yancong Wu
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, People’s Republic of China
| | - Kesheng Shen
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, People’s Republic of China
| | - Kun Zhao
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, People’s Republic of China
| | - Chuang Li
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, People’s Republic of China
| | - Guozhen Huang
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, People’s Republic of China
| | - Xintong Han
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, People’s Republic of China
| | - Huilu Wu
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, People’s Republic of China
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14
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Padilha DDS, Scarpellini M. Chlorido-(2,2'-{[2-(1-methyl-1 H-imidazol-2-yl-κ N 3)imidazolidine-1,3-diyl-κ N]bis-(methyl-ene)}bis-(1-methyl-1 H-imidazole-κ N 3))copper(II) perchlorate. Acta Crystallogr E Crystallogr Commun 2019; 75:547-551. [PMID: 31110783 PMCID: PMC6505613 DOI: 10.1107/s2056989019004055] [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: 03/13/2019] [Accepted: 03/25/2019] [Indexed: 11/11/2022]
Abstract
In the crystal structure of the title complex, [CuCl(C17H24N8)]ClO4, the copper(II) metal exhibits an N4Cl penta-coordinate environment in a distorted square-pyramidal geometry. Coordination to the metal centre occurs through the three 1-methyl-imidazole N atoms from the pendant groups, one amine N atom from the imidazolidine moiety and one chlorido anion. Inter-molecular inter-actions take place at two of the 1-methyl--imidazole rings in the form of parallel-displaced π-π stacking inter-actions forming chains parallel to the a axis. Three O atoms of the perchlorate anion are rotationally disordered between two orientations with occupancies of 0.5.
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Affiliation(s)
- Diego da Silva Padilha
- Instituto de Química, Universidade Federal do Rio de Janeiro, Av. Athos da, Silveira Ramos, 149, Bl. A, Lab. 628a. CEP 21941-909, Rio de Janeiro, RJ, Brazil
| | - Marciela Scarpellini
- Instituto de Química, Universidade Federal do Rio de Janeiro, Av. Athos da, Silveira Ramos, 149, Bl. A, Lab. 628a. CEP 21941-909, Rio de Janeiro, RJ, Brazil
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15
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Copper Utilization, Regulation, and Acquisition by Aspergillus fumigatus. Int J Mol Sci 2019; 20:ijms20081980. [PMID: 31018527 PMCID: PMC6514546 DOI: 10.3390/ijms20081980] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 04/16/2019] [Accepted: 04/17/2019] [Indexed: 01/01/2023] Open
Abstract
Copper is an essential micronutrient for the opportunistic human pathogen, Aspergillus fumigatus. Maintaining copper homeostasis is critical for survival and pathogenesis. Copper-responsive transcription factors, AceA and MacA, coordinate a complex network responsible for responding to copper in the environment and determining which response is necessary to maintain homeostasis. For example, A. fumigatus uses copper exporters to mitigate the toxic effects of copper while simultaneously encoding copper importers and small molecules to ensure proper supply of the metal for copper-dependent processes such a nitrogen acquisition and respiration. Small molecules called isocyanides recently found to be produced by A. fumigatus may bind copper and partake in copper homeostasis similarly to isocyanide copper chelators in bacteria. Considering that the host uses copper as a microbial toxin and copper availability fluctuates in various environmental niches, understanding how A. fumigatus maintains copper homeostasis will give insights into mechanisms that facilitate the development of invasive aspergillosis and its survival in nature.
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16
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Qu Y, Wang C, Wu Y, Han X, Zhao K, Huang G, Shen K, Li C, Wu H. Three cuprous coordination polymers based on bisbenzoxazole: Syntheses, structures, luminescence and electrochemical properties. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.01.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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17
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Martini N, Parente JE, D Alessandro F, Rey M, Rizzi A, Williams PAM, Ferrer EG. Potential bio-protective effect of copper compounds: mimicking SOD and peroxidases enzymes and inhibiting acid phosphatase as a target for anti-osteoporotic chemotherapeutics. Mol Biol Rep 2018; 46:867-885. [PMID: 30506507 DOI: 10.1007/s11033-018-4542-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 11/28/2018] [Indexed: 11/28/2022]
Abstract
Copper complexes with transformed methimazole ligand have been synthesized and characterized by elemental analysis, conductivity measurements, thermogravimetric analysis, EPR, FTIR and UV-Vis spectroscopies. Results support their stoichiometries and geometrical structures: [Cu(C4H5N2S)2Cl2]·2H2O(1), [Cu(C8H10N4S)SO4H2O](2) and [Cu(C8H10N4S)SO4](3). ((C4H5N2)2S: bis(l-methylimidazol-2-yl)sulfide; (C4H5N2S)2 = Bis[bis(l-methylimidazol-2-yl)disulfide]) Concurrently, the structurally distinct soluble species corresponding to complexes (1) and (2) were subsequently used in an in vitro investigation of their potential biological properties. In view of their possible pharmaceutical activity, the complexes were in vitro evaluated as phosphatase acid inhibitors. Their radical bio-protective effects were also studied measuring the effect against DPPH• and O2•- radicals. Additional catalytic properties as peroxidase mimics were evaluated using Michaelis-Menten kinetic model by means of phenol red and pyrogallol assays. The complexes exhibited catalytic bromination activity and the ability to oxidize pyrogallol substrate indicating that they can be considered as functional models. The relationships between the structures and the in vitro biological activities have also been considered. Serum protein albumin has attracted the greatest interest as drug carrier and the affinity of biological/pharmaceutical compound is relevant to the development of new medicine. In that sense, interaction studies by fluorescence and EPR spectroscopies were performed showing the binding capacity of the complexes.
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Affiliation(s)
- Nancy Martini
- CEQUINOR, CONICET-CICPBA-UNLP, Faculty of Exact Sciences, National University of La Plata, Bv. 120 No 1465, 1900, La Plata, Argentina
| | - Juliana E Parente
- CEQUINOR, CONICET-CICPBA-UNLP, Faculty of Exact Sciences, National University of La Plata, Bv. 120 No 1465, 1900, La Plata, Argentina
| | - Franco D Alessandro
- CEQUINOR, CONICET-CICPBA-UNLP, Faculty of Exact Sciences, National University of La Plata, Bv. 120 No 1465, 1900, La Plata, Argentina
| | - Marilin Rey
- Physics Department, Faculty of Biochemistry and Biological Sciences, National University of the Litoral, Ciudad Universitaria-Paraje El Pozo, 3000, Santa Fe, Argentina
| | - Alberto Rizzi
- Physics Department, Faculty of Biochemistry and Biological Sciences, National University of the Litoral, Ciudad Universitaria-Paraje El Pozo, 3000, Santa Fe, Argentina
| | - Patricia A M Williams
- CEQUINOR, CONICET-CICPBA-UNLP, Faculty of Exact Sciences, National University of La Plata, Bv. 120 No 1465, 1900, La Plata, Argentina
| | - Evelina G Ferrer
- CEQUINOR, CONICET-CICPBA-UNLP, Faculty of Exact Sciences, National University of La Plata, Bv. 120 No 1465, 1900, La Plata, Argentina.
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18
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Dashtestani F, Ghourchian H, Najafi A. Albumin coated copper-cysteine nanozyme for reducing oxidative stress induced during sperm cryopreservation. Bioorg Chem 2018; 80:621-630. [DOI: 10.1016/j.bioorg.2018.07.020] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 07/15/2018] [Accepted: 07/16/2018] [Indexed: 11/29/2022]
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19
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Han X, Shen K, Huang G, Li C, Mao S, Shi X, Wu H. Synthesis, structure, electrochemical properties and superoxide radical scavenging activities of two thiocyanate copper(II) complexes with different pyridyl-benzoxazole ligands. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.05.058] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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20
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Shen K, Han X, Li C, Huang G, Mao S, Shi X, Wu H. Synthesis, structure, electrochemical properties, and antioxidant activities of copper(II) and zinc(II) complexes with N,N-bis(N-ethyl-2-ylmethylbenzimidazol)allylamine ligand. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1454593] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Kesheng Shen
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, PR China
| | - Xintong Han
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, PR China
| | - Chuang Li
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, PR China
| | - Guozhen Huang
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, PR China
| | - Shanshan Mao
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, PR China
| | - Xinkui Shi
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, PR China
| | - Huilu Wu
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, PR China
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21
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Snider VG, Pella BJ, Mukherjee A. Synthesis, characterization, and reactivity of copper complexes supported by the TPMEN ligand framework. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.09.041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Pereira MB, Fontana LA, Siqueira JD, Auras BL, da Silva MP, Neves A, Gabriel P, Terenzi H, Iglesias BA, Back DF. Pyridoxal derivatized copper(II) complexes: Evaluation of antioxidant, catecholase, and DNA cleavage activity. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.09.063] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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23
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Manzanera-Estrada ME, Cruz-Ramírez M, Flores-Alamo M, Gracia y Jiménez JM, Galindo-Murillo R, García-Ramos JC, Ruiz-Azuara L, Ortiz-Frade L. Effect of tunable redox behavior of bis chelate substituted 1,10-phenantroline Cu(II) complexes on its reaction with superoxide anion in DMSO. Toward a simple criterion to identify a SOD-like mechanism. J Inorg Biochem 2017; 175:118-128. [DOI: 10.1016/j.jinorgbio.2017.07.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 07/10/2017] [Accepted: 07/13/2017] [Indexed: 10/19/2022]
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24
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Spaeth AD, Gagnon NL, Dhar D, Yee GM, Tolman WB. Determination of the Cu(III)-OH Bond Distance by Resonance Raman Spectroscopy Using a Normalized Version of Badger's Rule. J Am Chem Soc 2017; 139:4477-4485. [PMID: 28319386 PMCID: PMC5975256 DOI: 10.1021/jacs.7b00210] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The stretching frequency, ν(Cu-O), of the [CuOH]2+ core in the complexes LCuOH (L = N,N'-bis(2,6-diisopropyl-4-R-phenyl)pyridine-2,6-dicarboxamide, R = H or NO2, or N,N'-bis(2,6-diisopropylphenyl)-1-methylpiperidine-2,6-dicarboxamide) was determined to be ∼630 cm-1 by resonance Raman spectroscopy and verified by isotopic labeling. In efforts to use Badger's rule to estimate the bond distance corresponding to ν(Cu-O), a modified version of the rule was developed through use of stretching frequencies normalized by dividing by the appropriate reduced masses. The modified version was found to yield excellent fits of normalized frequencies to bond distances for >250 data points from theory and experiment for a variety of M-X and X-X bond distances in the range ∼1.1-2.2 Å (root mean squared errors for the predicted bond distances of 0.03 Å). Using the resulting general equation, the Cu-O bond distance was predicted to be ∼1.80 Å for the reactive [CuOH]2+ core. Limitations of the equation and its use in predictions of distances in a variety of moieties for which structural information is not available were explored.
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Affiliation(s)
- Andrew D. Spaeth
- Department of Chemistry and Center for Metals in Biocatalysis, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Nicole L. Gagnon
- Department of Chemistry and Center for Metals in Biocatalysis, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Debanjan Dhar
- Department of Chemistry and Center for Metals in Biocatalysis, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Gereon M. Yee
- Department of Chemistry and Center for Metals in Biocatalysis, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - William B. Tolman
- Department of Chemistry and Center for Metals in Biocatalysis, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
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25
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Saad FA, Knight JC, Kariuki BM, Amoroso AJ. Co-ordination behaviour of a novel tristhiourea tripodal ligand; structural variations in a series of transition metal complexes. Dalton Trans 2016; 45:10280-8. [PMID: 27240882 DOI: 10.1039/c6dt01148a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The co-ordination chemistry of a tristhiourea tris(2-pyridylmethyl)amine ligand () with a series of transition metal ions has been investigated. Crystallographic data show that large metal ions, with no geometrical preferences, such as Mn(ii) and Cd(ii), will form seven co-ordinate monocapped octahedral complexes, while smaller metal ions such as Zn(ii) favour five co-ordinate trigonal bipyramidal structures. In a similar manner to the related bisthiourea complexes, the Ni(ii) complex shows a strong preference for octahedral geometries resulting in the ligand binding asymmetrically. Spectroscopic (IR and NMR), spectrometric (MS) as well as electrochemical data for these complexes are reported.
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Affiliation(s)
- Fawaz A Saad
- Umm Al-Qura University, Kingdom of Saudi Arabia. and School of Chemistry, Cardiff University, Cardiff, UK.
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26
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Mao K, Wang C, Dai H, Tang Y, Huang S, Shan L, Zhao X, Zhou X, Zhang Z. Synthetic Methods Over Crystal Structures of Two Copper(II) Coordination Complexes Based on Pyrazine Derivatived Ligand. J Inorg Organomet Polym Mater 2015. [DOI: 10.1007/s10904-015-0308-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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27
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Gáliková J, Trávníček Z. Structural Diversity of Copper(II) Complexes with 9-Deazahypoxanthine and Their in Vitro SOD-Like Activity. Int J Mol Sci 2015; 16:15954-70. [PMID: 26184182 PMCID: PMC4519932 DOI: 10.3390/ijms160715954] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Revised: 07/02/2015] [Accepted: 07/08/2015] [Indexed: 01/11/2023] Open
Abstract
Two structurally different copper(II) complexes of the compositions [{Cu(9dhx)(H2O)3}2(µ-SO4)2] (1) and [Cu(9dhx)2(H2O)2(NO3)2]·H2O (2), involving 9-deazahypoxanthine (9dhx; 6-oxo-9-deazapurine; 9-deazahypoxanthine), have been prepared and characterized by elemental analysis, infrared and electronic spectroscopy, electrospray ionisation (ESI) mass spectrometry, thermogravimetric (TG) and differential thermal (DTA) analyses, and cyclic voltammetry. The X-ray structures of complexes 1 and [Cu(9dhx)2(H2O)2(NO3)2] (2a) revealed the distorted octahedral geometry in the vicinity of the copper(II) atoms, with the NO5 and N2O4 donor set, respectively. In the dimeric compound 1, the {Cu(9dhx)(H2O)3}2 units are bridged by sulfate groups with the Cu···Cu separation being 5.3446(2) Å. In both structures the 9dhx ligands are coordinated through the N3 atoms of the pyrimidine moieties. The SOD-like activity of complexes 1 and 2 was evaluated in vitro showing moderate effect, with the IC50 values equal to 18.20, and 53.33 μM, respectively.
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Affiliation(s)
- Jana Gáliková
- Regional Centre of Advanced Technologies and Materials, Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771-46 Olomouc, Czech Republic.
| | - Zdeněk Trávníček
- Regional Centre of Advanced Technologies and Materials, Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771-46 Olomouc, Czech Republic.
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28
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Weisser F, Stevens H, Klein J, van der Meer M, Hohloch S, Sarkar B. Tailoring RuIIPyridine/Triazole Oxygenation Catalysts and Using Photoreactivity to Probe their Electronic Properties. Chemistry 2015; 21:8926-38. [DOI: 10.1002/chem.201406441] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Indexed: 12/17/2022]
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29
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Feng XD, Zhang R, Wang XY, Zhang XX, Wang JX, Xing YH, Sun LX. Mimicing bromoperoxidase for copper complexes: Synthesis, structures and properties of Cu(II)–triazine pyrazolyl complex. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.01.038] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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30
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Zhou YH, Chen LQ, Lv QC, Tao J, Liu XW, Cheng Y. Synthesis, Structure, and Bio-activity of a Copper(II)-OH2Complex based onN,N′-Bis(2-quinolinylmethyl)amantadine. Z Anorg Allg Chem 2014. [DOI: 10.1002/zaac.201400393] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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31
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Zhou YH, Sun DL, Tao J, Chen LQ, Huang YF, Li YK, Cheng Y. Synthesis, crystal structure, and SOD-like activity of two copper(II) complexes with hydroxymethyl pendants. J COORD CHEM 2014. [DOI: 10.1080/00958972.2014.940335] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Ying-Hua Zhou
- College of Chemistry and Materials Science, Anhui Normal University, Wuhu, PR China
- Center for Nano Science and Technology, Anhui Normal University, Wuhu, PR China
| | - Da-Liang Sun
- College of Chemistry and Materials Science, Anhui Normal University, Wuhu, PR China
| | - Jun Tao
- College of Chemistry and Materials Science, Anhui Normal University, Wuhu, PR China
| | - Li-Qing Chen
- College of Chemistry and Materials Science, Anhui Normal University, Wuhu, PR China
| | - Ya-Fan Huang
- College of Chemistry and Materials Science, Anhui Normal University, Wuhu, PR China
| | - Ying-Kun Li
- College of Chemistry and Materials Science, Anhui Normal University, Wuhu, PR China
| | - Yong Cheng
- College of Chemistry and Materials Science, Anhui Normal University, Wuhu, PR China
- The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Normal University, Wuhu, PR China
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Moore CM, Quist DA, Kampf JW, Szymczak NK. A 3-Fold-Symmetric Ligand Based on 2-Hydroxypyridine: Regulation of Ligand Binding by Hydrogen Bonding. Inorg Chem 2014; 53:3278-80. [DOI: 10.1021/ic5003594] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Cameron M. Moore
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - David A. Quist
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Jeff W. Kampf
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Nathaniel K. Szymczak
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
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33
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Kocyigit O. A novel Schiff base bearing dopamine groups with tripodal structure. Synthesis and its salen/salophen-bridged Fe/Cr(III) capped complexes. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2012.09.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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34
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Knight JC, Wuest M, Saad FA, Wang M, Chapman DW, Jans HS, Lapi SE, Kariuki BM, Amoroso AJ, Wuest F. Synthesis, characterisation and evaluation of a novel copper-64 complex with selective uptake in EMT-6 cells under hypoxic conditions. Dalton Trans 2013; 42:12005-14. [DOI: 10.1039/c3dt50960e] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Tabassum S, Zaki M, Afzal M, Arjmand F. New modulated design and synthesis of quercetin–CuII/ZnII–Sn2IV scaffold as anticancer agents: in vitro DNA binding profile, DNA cleavage pathway and Topo-I activity. Dalton Trans 2013; 42:10029. [DOI: 10.1039/c3dt50646k] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
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36
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Zhang X, Huang D, Chen YS, Holm RH. Synthesis of binucleating macrocycles and their nickel(II) hydroxo- and cyano-bridged complexes with divalent ions: anatomical variation of ligand features. Inorg Chem 2012; 51:11017-29. [PMID: 23030366 DOI: 10.1021/ic301506x] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The planar NNN-pincer complexes [M(II)(pyN(2)(Me2))(OH)](1-) (M(II) = Ni, Cu) fix CO(2) in η(1)-OCO(2)H complexes; results for the copper system are described. Mn(II), Fe(II), Co(II), and Zn(II) behave differently, forming [M(II)(pyN(2)(Me2))(2)](2-) with N(4)O(2) coordination. Incorporation of the Ni(II) pincer into binucleating macrocycle 2 containing a triamino M(II) locus connected by two 1,3-biphenylene groups affords proximal Ni(II) and M(II) sites for investigation of the synthesis, structure, and reactivity of Ni-X-M bridge units. This ligand structure is taken as a reference for variations in M(II) atoms and binding sites and bridges X = OH(-) and CN(-) to produce additional members of the macrocyclic family with improved properties. Macrocycle 2 with a 22-membered ring is shown to bind M(II) = Mn, Fe, and Cu with hydroxo bridges. Introduction of the 4-Bu(i)O group (macrocycle 3) improves the solubility of neutral complexes such as those with Ni(II)-OH-Cu(II) and Ni(II)-CN-Fe(II) bridges. Syntheses of macrocycle 5 with a 7-Me-[12]aneSN(3) and macrocycle 6 with a 1,8-Me(2)-[14]aneN(4) M(II) binding site are described together with hydoxo-bridged Ni/Cu and cyano-bridged Ni/Fe complexes. This work was motivated by the presence of a Ni···(HO)-Fe bridge grouping in a reactive state of carbon monoxide dehydrogenase. Attempted decrease in Ni-(OH)-M distances (3.70-3.87 Å) to smaller values observed in the enzyme by use of macrocycle 4 having 1,2-biphenylene connectors led to a mononuclear octahedral Ni(II) complex. Bridge structural units are summarized, and the structures of 14 macrocyclic complexes including 8 with bridges are described.
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Affiliation(s)
- Xiaofeng Zhang
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA
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37
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Pap JS, Kripli B, Bors I, Bogáth D, Giorgi M, Kaizer J, Speier G. Transition metal complexes bearing flexible N₃ or N₃O donor ligands: reactivity toward superoxide radical anion and hydrogen peroxide. J Inorg Biochem 2012; 117:60-70. [PMID: 23078775 DOI: 10.1016/j.jinorgbio.2012.08.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Revised: 08/22/2012] [Accepted: 08/24/2012] [Indexed: 01/25/2023]
Abstract
Mononuclear complexes of N-methylpropanoate-N,N-bis-(2-pyridylmethyl)amine (MPBMPA) and N-propanoate-N,N-bis-(2-pyridylmethyl)amine (HPBMPA) with first row transition metals from Mn to Cu were synthesized and characterized by spectroscopy (infrared, UV-visible), electrochemistry (cyclic voltammetry), microanalysis and in four cases X-ray crystallography. Structure of the complexes revealed high flexibility of these ligands that can adopt facial (Fe) and meridional (Cu) geometry. Activity in the degradation of reactive oxygen species (superoxide radical anion: superoxide dismutase (SOD)-like activity and hydrogen peroxide: catalase-like activity) was tested throughout the complex series in aqueous solutions. In connection with the catalytic dismutation of H(2)O(2), bleaching tests with morin were also conducted in water. Comparison of the two ligands helped in elucidating the possible role of the carboxylate moiety in the different catalytic reactions. Although no general trends could be revealed between reactivity and constitution of the first coordination sphere, plausible explanations for differences are discussed individually for SOD like, catalase-like and bleaching activity.
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Affiliation(s)
- József S Pap
- Department of Chemistry, University of Pannonia, 8201 Veszprém, Hungary
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38
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Novotná R, Trávníček Z, Herchel R. SOD-Mimic Cu(II) Dimeric Complexes Involving Kinetin and Its Derivative: Preparation and Characterization. Bioinorg Chem Appl 2012; 2012:704329. [PMID: 22966218 PMCID: PMC3433123 DOI: 10.1155/2012/704329] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Accepted: 07/10/2012] [Indexed: 11/25/2022] Open
Abstract
Two SOD-mimic active dimeric Cu(II) chlorido complexes of the compositions [Cu(2)(μ-HL(1))(4)Cl(2)]Cl(2) (1) and [Cu(2)(μ-HL(2))(2)(μ-Cl)(2)(HL(2))(2)Cl(2)] · 4H(2)O (2) involving the cosmetologically relevant cytokinin kinetin (N6-furfuryladenine, HL(1)) and its derivative N6-(5-methylfurfuryl)adenine (HL(2)) have been synthesized and characterized by elemental analysis, infrared, and electronic spectroscopy, ESI+ mass spectrometry, conductivity and temperature dependence of magnetic susceptibility measurements, and thermogravimetric (TG) and differential thermal (DTA) analyses. The results of these methods, particularly the temperature dependence of magnetic susceptibility, showed the complexes to be dimeric with a strong antiferromagnetic exchange (J = -290 cm(-1) for complex 1 and J = -160 cm(-1) for 2). The complexes have been identified as auspicious SOD-mimics, as their antiradical activity evaluated by the in vitro SOD-mimic assay resulted in the IC(50) values equal to 8.13 μM (1) and 0.71 μM (2).
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Affiliation(s)
- Radka Novotná
- Department of Inorganic Chemistry, Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University, 17. listopadu 12, 771 46 Olomouc, Czech Republic
| | - Zdeněk Trávníček
- Department of Inorganic Chemistry, Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University, 17. listopadu 12, 771 46 Olomouc, Czech Republic
| | - Radovan Herchel
- Department of Inorganic Chemistry, Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University, 17. listopadu 12, 771 46 Olomouc, Czech Republic
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39
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Qiu GM, Wang CJ, Zhang YJ, Huang S, Liu XL, Zhang BJ, Zhou XL. Synthesis, Structure and Biological Properties of a Novel Copper (II) Supramolecular Compound Based on 1,2,4-Triazoles Derivatives. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.8.2603] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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40
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Buchtík R, Trávníček Z, Vančo J. In vitro cytotoxicity, DNA cleavage and SOD-mimic activity of copper(II) mixed-ligand quinolinonato complexes. J Inorg Biochem 2012; 116:163-71. [PMID: 23022693 DOI: 10.1016/j.jinorgbio.2012.07.009] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2012] [Revised: 07/02/2012] [Accepted: 07/02/2012] [Indexed: 12/29/2022]
Abstract
Six mixed-ligand copper(II) complexes with the composition [Cu(qui)(L)]BF(4)·xH(2)O (1-6), where Hqui=2-phenyl-3-hydroxy-4(1H)-quinolinone, L=2,2'-bipyridine (bpy) (1), 1,10-phenanthroline (phen) (2), bis(2-pyridyl)amine (ambpy) (3), 5-methyl-1,10-phenanthroline (mphen) (4), 5-nitro-1,10-phenanthroline (nphen) (5) and bathophenanthroline (bphen) (6), were prepared, fully characterized and studied for their in vitro cytotoxicity on human osteosarcoma (HOS) and human breast adenocarcinoma (MCF7) cancer cell lines. The overall promising results of the cytotoxicity were found for all the complexes, while the best results were achieved for complex 6, with IC(50)=2.6 ± 0.8 μM (HOS), and 1.3 ± 0.5 μM (MCF7). The interactions of the Cu(II) complexes 1-6 with calf thymus DNA were investigated by the UV-visible spectral titration. An agarose-gel electrophoretic method of oxidative damage determination to circular plasmid pUC19 was used to assess the ability of the complexes to act as chemical nucleases. A high effectiveness of DNA cleavage was observed for 2, 4 and 5. In vitro antioxidative activity of the complexes was studied by the superoxide dismutase-mimic (SOD-mimic) method. The best result was afforded by complex 1 with IC(50)=4.7 ± 1.0 μM, which corresponds to 10.2% of the native Cu,Zn-SOD enzyme activity. The ability of the tested complexes to interact with sulfur-containing biomolecules (cysteine and reduced glutathione) at physiological levels was proved by electrospray-ionization mass spectrometry (ESI-MS).
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Affiliation(s)
- Roman Buchtík
- Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic
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41
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Yamada Y, Maeda K, Ohkubo K, Karlin KD, Fukuzumi S. Improvement of durability of an organic photocatalyst in p-xylene oxygenation by addition of a Cu(II) complex. Phys Chem Chem Phys 2012; 14:9654-9. [PMID: 22692585 DOI: 10.1039/c2cp41207a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The catalytic durability of an organic photocatalyst, 9-mesityl-10-methyl acridinium ion (Acr(+)-Mes), has been dramatically improved by the addition of [{tris(2-pyridylmethyl)amine}Cu(II)](ClO(4))(2) ([(tmpa)Cu(II)](2+)) in the photocatalytic oxygenation of p-xylene by molecular oxygen in acetonitrile. Such an improvement is not observed by the addition of Cu(ClO(4))(2) in the absence of organic ligands. The addition of [(tmpa)Cu](2+) in the reaction solution resulted in more than an 11 times higher turnover number (TON) compared with the TON obtained without [(tmpa)Cu(II)](2+). In the photocatalytic oxygenation, a stoichiometric amount of H(2)O(2) formation was observed in the absence of [(tmpa)Cu(II)](2+), however, much less H(2)O(2) formation was observed in the presence of [(tmpa)Cu(II)](2+). The photocatalytic mechanism was investigated by laser flash photolysis measurements in order to detect intermediates. The reaction of O(2)˙(-) with [(tmpa)Cu(II)](2+) monitored by UV-vis spectroscopy in propionitrile at 203 K suggested formation of [{(tmpa)Cu(II)}(2)O(2)](2+), a transformation which is crucial for the overall 4-electron reduction of molecular O(2) to water, and a key in the observed improvement in the catalytic durability of Acr(+)-Mes.
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Affiliation(s)
- Yusuke Yamada
- Department of Material and Life Science, Division of Advanced Science and Biotechnology, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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Barba M, Sobolev AP, Zobnina V, Bonaccorsi di Patti MC, Cervoni L, Spiezia MC, Schininà ME, Pietraforte D, Mannina L, Musci G, Polticelli F. Cupricyclins, novel redox-active metallopeptides based on conotoxins scaffold. PLoS One 2012; 7:e30739. [PMID: 22319584 PMCID: PMC3272027 DOI: 10.1371/journal.pone.0030739] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Accepted: 12/27/2011] [Indexed: 11/18/2022] Open
Abstract
Highly stable natural scaffolds which tolerate multiple amino acid substitutions represent the ideal starting point for the application of rational redesign strategies to develop new catalysts of potential biomedical and biotechnological interest. The knottins family of disulphide-constrained peptides display the desired characteristics, being highly stable and characterized by hypervariability of the inter-cysteine loops. The potential of knottins as scaffolds for the design of novel copper-based biocatalysts has been tested by engineering a metal binding site on two different variants of an ω-conotoxin, a neurotoxic peptide belonging to the knottins family. The binding site has been designed by computational modelling and the redesigned peptides have been synthesized and characterized by optical, fluorescence, electron spin resonance and nuclear magnetic resonance spectroscopy. The novel peptides, named Cupricyclin-1 and -2, bind one Cu2+ ion per molecule with nanomolar affinity. Cupricyclins display redox activity and catalyze the dismutation of superoxide anions with an activity comparable to that of non-peptidic superoxide dismutase mimics. We thus propose knottins as a novel scaffold for the design of catalytically-active mini metalloproteins.
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Affiliation(s)
- Marco Barba
- Department of Biology, University Roma Tre, Rome, Italy
| | | | | | | | - Laura Cervoni
- Department of Biochemical Sciences, Sapienza University of Rome, Rome, Italy
| | | | - M. Eugenia Schininà
- Department of Biochemical Sciences, Sapienza University of Rome, Rome, Italy
| | - Donatella Pietraforte
- Department of Cell Biology and Neurosciences, Istituto Superiore di Sanità, Rome, Italy
| | - Luisa Mannina
- Institute of Chemical Methodologies, CNR, Monterotondo Stazione, Italy
- Department of Drug Sciences and Technologies, Sapienza University of Rome, Rome, Italy
| | - Giovanni Musci
- Department of Biology, University Roma Tre, Rome, Italy
- STAAM Department, University of Molise, Campobasso, Italy
| | - Fabio Polticelli
- Department of Biology, University Roma Tre, Rome, Italy
- National Institute of Nuclear Physics, Roma Tre Section, Rome, Italy
- * E-mail:
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43
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Structurally varied Cu(II) complexes involving kinetin and its derivatives: Synthesis, characterization and evaluation of SOD-mimic activity. Polyhedron 2012. [DOI: 10.1016/j.poly.2011.12.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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44
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Kimani MM, Wang HC, Brumaghim JL. Investigating the copper coordination, electrochemistry, and Cu(ii) reduction kinetics of biologically relevant selone and thione compounds. Dalton Trans 2012; 41:5248-59. [DOI: 10.1039/c2dt11731b] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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45
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Pap JS, Kripli B, Bányai V, Giorgi M, Korecz L, Gajda T, Árus D, Kaizer J, Speier G. Tetra-, penta- and hexacoordinate copper(II) complexes with N3 donor isoindoline-based ligands: Characterization and SOD-like activity. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.06.001] [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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46
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Liao SR, Le XY, Feng XL. Syntheses, characterizations and SOD-like activities of ternary copper(II) complexes with 1,10-phenanthroline and L- α -amino acids. J COORD CHEM 2010. [DOI: 10.1080/00958970701476943] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Sheng Rong Liao
- a Department of Applied Chemistry , College of Sciences, South China Agricultural University , Guangzhou 510642, P.R. China
| | - Xue Yi Le
- a Department of Applied Chemistry , College of Sciences, South China Agricultural University , Guangzhou 510642, P.R. China
| | - Xiao Long Feng
- b Center of Analysis and Measurement , Sun Yatsen University , Guangzhou 510275, P.R. China
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47
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Wu HL, Huang X, Yuan J, Li K, Ding J, Yun R, Dong W, Fan X. A five-coordinate copper(II) perchlorate complex with tris(N-methylbenzimidazol-2-ylmethyl)amine and salicylate. J COORD CHEM 2010. [DOI: 10.1080/00958970903089684] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Hui-lu Wu
- a School of Chemical and Biological Engineering , Lanzhou Jiaotong University , Lanzhou 730070, P.R. China
| | - Xingcai Huang
- a School of Chemical and Biological Engineering , Lanzhou Jiaotong University , Lanzhou 730070, P.R. China
| | - Jingkun Yuan
- a School of Chemical and Biological Engineering , Lanzhou Jiaotong University , Lanzhou 730070, P.R. China
| | - Ke Li
- a School of Chemical and Biological Engineering , Lanzhou Jiaotong University , Lanzhou 730070, P.R. China
| | - Jian Ding
- a School of Chemical and Biological Engineering , Lanzhou Jiaotong University , Lanzhou 730070, P.R. China
| | - Ruirui Yun
- a School of Chemical and Biological Engineering , Lanzhou Jiaotong University , Lanzhou 730070, P.R. China
| | - Wenkui Dong
- a School of Chemical and Biological Engineering , Lanzhou Jiaotong University , Lanzhou 730070, P.R. China
| | - Xuyang Fan
- a School of Chemical and Biological Engineering , Lanzhou Jiaotong University , Lanzhou 730070, P.R. China
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48
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Wu HL, Jia F, Meng X, Chen Q, Liu B, Lai YL, Kou F. Synthesis, crystal structure, and properties of a seven-coordinate manganese(II) complex formed with the tripodal tetradentate ligand tris (N -methylbenzimidazol-2-ylmethyl)amine and salicylate. J COORD CHEM 2010. [DOI: 10.1080/00958972.2010.516825] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Hui-Lu Wu
- a School of Chemical and Biological Engineering , Lanzhou Jiaotong University , Lanzhou, Gansu 730070, P.R. China
- b Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education , College of Chemistry and Material Science, Northwest University , Xi'an, Shaanxi 710069, P.R. China
| | - Fei Jia
- a School of Chemical and Biological Engineering , Lanzhou Jiaotong University , Lanzhou, Gansu 730070, P.R. China
| | - Xuan Meng
- a School of Chemical and Biological Engineering , Lanzhou Jiaotong University , Lanzhou, Gansu 730070, P.R. China
| | - Qian Chen
- a School of Chemical and Biological Engineering , Lanzhou Jiaotong University , Lanzhou, Gansu 730070, P.R. China
| | - Bin Liu
- a School of Chemical and Biological Engineering , Lanzhou Jiaotong University , Lanzhou, Gansu 730070, P.R. China
| | - Yu-Lin Lai
- a School of Chemical and Biological Engineering , Lanzhou Jiaotong University , Lanzhou, Gansu 730070, P.R. China
| | - Fan Kou
- a School of Chemical and Biological Engineering , Lanzhou Jiaotong University , Lanzhou, Gansu 730070, P.R. China
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Mononuclear copper (II) salicylate complexes with 1,2-dimethylimidazole and 2-methylimidazole: Synthesis, spectroscopic and crystal structure characterization and their superoxide scavenging activities. J Mol Struct 2010. [DOI: 10.1016/j.molstruc.2010.07.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Qi ZP, Cai K, Yuan Q, Okamura TA, Bai ZS, Sun WY, Ueyama N. Imidazolate-bridged dinuclear copper(II) complex with new macrocyclic ligand bearing two 1H-imidazol-4-yl-pendants. INORG CHEM COMMUN 2010. [DOI: 10.1016/j.inoche.2010.04.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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