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Navarro Y, Guedes GP, Cano J, Ocón P, Iglesias MJ, Lloret F, López-Ortiz F. Synthesis, structural characterization and electrochemical and magnetic studies of M(hfac) 2 (M = Cu II, Co II) and Nd(hfac) 3 complexes of 4-amino-TEMPO. Dalton Trans 2020; 49:6280-6294. [PMID: 32329759 DOI: 10.1039/d0dt00541j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Three mononuclear complexes [M(hfac)x(ATEMPO)y], where M = Cu (11) and Co (12), x = y = 2; M = Nd (13), x = 4, y = 1, and two polynuclear complexes [{Cu(hfac)2(ATEMPO)}n], where n = 2 (14) and 4 (15), were obtained by the reaction of M(hfac)x (M = CuII, CoII, NdIII; x = 2, 3) with 4-amino-TEMPO (4-amino-2,2,6,6-tetramethylpiperidin-N-oxyl) in good yields and their structural, electrochemical and magnetic properties were examined. In all cases, the radical is coordinated to the metal through the amino group, except 15, and the metal ions have an octahedral geometry, except 13. Different coordination architectures of the copper complexes were obtained as a function of the stoichiometry and solvents used. In complexes 11 and 12 the radicals show an equatorial-equatorial and axial-equatorial arrangement, respectively, giving rise to two distinct 2D supramolecular systems through intermolecular interactions. Compound 13 is the first example of a lanthanide complex of the ATEMPO radical. The NdIII ion adopts a rare nine-coordination via binding to four hfac ligands and the radical. The dinuclear complex 14 shows a (Cu-O)2 core in which the CuII ions are bridged by the oxygen atoms from the hfac ligands. In compound 15 the ATEMPO radical acts as a bidentate ligand through the amino and nitroxyl groups leading to an unprecedented tetranuclear square-shaped framework. Cyclic voltammetry showed redox processes associated with the copper and TEMPO moieties. Electrochemical impedance spectroscopy revealed the temperature dependence of the conductivity for compound 15 with a maximum of 2.09 × 10-5 S cm-1 at 408 K. The magnetic behavior of complexes 11-15 is determined by metal-radical interactions. Ferromagnetic interaction has been observed for complex 11 due to the existence of two different exchange pathways arising from the conformational arrangement of the radicals around the metal center, whereas the single conformation of the radical in complex 14 resulted in a weak antiferromagnetic coupling. In complex 15 both O-Cu and N-Cu contacts are present giving rise to ferromagnetic and antiferromagnetic interactions, respectively.
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Affiliation(s)
- Yolanda Navarro
- Área de Química Orgánica, Centro de Investigación CIAIMBITAL, Universidad de Almería, Carretera de Sacramento s/n, 04120 Almería, Spain.
| | - Guilherme P Guedes
- Universidade Federal Fluminense, Instituto de Química, Departamento de Química Inorgânica, Niterói, Rio de Janeiro, Brazil
| | - Joan Cano
- Institut de Ciencia Molecular, Universitat de València, Catedràtic José Beltrán n°2, 46980 Paterna, Valencia, Spain
| | - Pilar Ocón
- Departamento de Química Física Aplicada, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - María José Iglesias
- Área de Química Orgánica, Centro de Investigación CIAIMBITAL, Universidad de Almería, Carretera de Sacramento s/n, 04120 Almería, Spain.
| | - Francisco Lloret
- Institut de Ciencia Molecular, Universitat de València, Catedràtic José Beltrán n°2, 46980 Paterna, Valencia, Spain
| | - Fernando López-Ortiz
- Área de Química Orgánica, Centro de Investigación CIAIMBITAL, Universidad de Almería, Carretera de Sacramento s/n, 04120 Almería, Spain.
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Parlak AE, Cakmak H, Sandal S, Yılmaz B, Sekerci M, Karagöz Genc Z, Tuzcu M, Karatepe M. Evaluation of antioxidant and antiproliferative activities of 1,2-bis (p-amino-phenoxy) ethane derivative Schiff bases and metal complexes. J Biochem Mol Toxicol 2018; 33:e22247. [PMID: 30431697 DOI: 10.1002/jbt.22247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 09/04/2018] [Accepted: 09/07/2018] [Indexed: 11/06/2022]
Abstract
In this study, the effects of the two Schiff base derivatives and their metal complexes were tested for MDA concentration, which is an indicator of lipid peroxidation, antioxidant vitamin A, vitamin E, and vitamin C levels in cell culture. A comparison was performed among the groups and it was observed that MDA, vitamin A, vitamin E, and vitamin C concentrations were statistically changed. According to the results, all compounds caused a significant oxidative stress without Zn complexes. Moreover, Mn(II), Cu(II), Zn(II), and Ni(II) complexes of Schiff bases derived from a condensation of 1,2-bis (p-aminophenoxy) ethane with naphthaldehydes and 4-methoxy benzaldehyde were examined in terms of antitumor activity against MCF-7 human breast cancer and L1210 murine leukemia cells. Furthermore, the derivatives were tested for antioxidative and prooxidative effects on MCF-7 breast cancer cells. The compounds which were tested revealed that there was an antitumor activity for MCF-7 and L 1210 cancer cells. Also, some of the compounds induced oxidative harmful.
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Affiliation(s)
- Akif Evren Parlak
- Department of Environmental Technology, Firat University, Keban Vocational School of Higher Education, Programme of Environmental Protection and Control, Elazig, Turkey
| | - Haluk Cakmak
- Department of Chemistry, Faculty of Sciences, Firat University, Elazig, Turkey
| | - Suleyman Sandal
- Department of Physiology, Faculty of Medicine, Inonu University, Malatya, Turkey
| | - Bayram Yılmaz
- Department of Physiology, Faculty of Medicine, Yeditepe University, Istanbul, Turkey
| | - Memet Sekerci
- Department of Chemistry, Faculty of Sciences, Firat University, Elazig, Turkey
| | - Zuhal Karagöz Genc
- Department of Metallurgy and Materials, Faculty of Engineering, Adiyaman University, Adıyaman, Turkey
| | - Mehmet Tuzcu
- Department of Biology, Faculty of Sciences, Firat University, Elazig, Turkey
| | - Mustafa Karatepe
- Department of Chemistry, Faculty of Sciences, Firat University, Elazig, Turkey
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Syntheses, characterization and antioxidant activity studies of mixed-ligand copper(II) complexes of 2,2′-bipyridine and glycine: The X-ray crystal structure of [Cu(BPy)(Gly)]ClO4. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.12.087] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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4
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Low ML, Maigre L, Tahir MIM, Tiekink ER, Dorlet P, Guillot R, Ravoof TB, Rosli R, Pagès JM, Policar C, Delsuc N, Crouse KA. New insight into the structural, electrochemical and biological aspects of macroacyclic Cu(II) complexes derived from S-substituted dithiocarbazate schiff bases. Eur J Med Chem 2016; 120:1-12. [DOI: 10.1016/j.ejmech.2016.04.027] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 03/25/2016] [Accepted: 04/09/2016] [Indexed: 11/28/2022]
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5
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Hosseini-Yazdi SA, Hosseinpour S, Khandar AA, White J. Synthesis, characterization, and X-ray crystal structures of copper(II) and nickel(II) complexes with two bis(thiosemicarbazone) ligands and investigation of their electrochemical behavior. TRANSIT METAL CHEM 2015. [DOI: 10.1007/s11243-015-9997-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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6
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Hosseini-Yazdi SA, Hosseinpour S, Khandar AA, Kassel WS, Piro NA. Copper(II) and nickel(II) complexes with two new bis(thiosemicarbazone) ligands: Synthesis, characterization, X-ray crystal structures and their electrochemistry behavior. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2014.12.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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7
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Jagadeesh M, Kalangi SK, Sivarama Krishna L, Reddy AV. Halo-substituted thiosemicarbazones and their copper(II), nickel(II) complexes: detailed spectroscopic characterization and study of antitumour activity against HepG2 human hepatoblastoma cells. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 118:552-556. [PMID: 24084484 DOI: 10.1016/j.saa.2013.08.092] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2013] [Accepted: 08/23/2013] [Indexed: 06/02/2023]
Abstract
Copper(II) and nickel(II) complexes of two different halogen substituted thiosemicarbazone ligands were synthesized. The ligands 3,4-difluoroacetophenone thiosemicarbazone (1) and 2-bromo-4'-chloroacetophenone thiosemicarbazone (2) were characterized and confirmed spectroscopically by FT-IR, FT-Raman, UV-vis and fluorescence spectral analysis, while the respective copper(II) complexes [Cu(C9H9N3F2S)2Cl2] (1a), [Cu(C9H9N3ClBrS)2Cl2] (2a) and nickel(II) complexes [Ni(C9H9N3F2S)2] (1b), [Ni(C9H9N3ClBrS)2] (2b) were characterized by FT-IR, UV-vis and electron paramagnetic spectroscopy (EPR). The EPR spectra of the Cu(II) complexes provided the rhombic octahedral and axial symmetry of the complexes 1a and 2a respectively. For the complex 1a, the g values calculated as g1=2.1228, g2=2.0706 and g3=2.001 between 2900 and 3300 G. While for the complex 2a, a set of two resonance absorptions were observed. The synthesized compounds were tested for antitumor activity and showed that the ability to kill liver cancer cells significantly. Out of all the synthesized compounds, copper(II) complexes 1a and 2a showed high cytotoxic effect on liver cancer cells with 67.51% and 42.77% of cytotoxicity respectively at 100 μM.
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Affiliation(s)
- M Jagadeesh
- Department of Chemistry, S.V. University, Tirupati 517 502, India
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Fernandes AS, Costa J, Gaspar J, Rueff J, Cabral MF, Cipriano M, Castro M, Oliveira NG. Development of pyridine-containing macrocyclic copper(II) complexes: potential role in the redox modulation of oxaliplatin toxicity in human breast cells. Free Radic Res 2012; 46:1157-66. [DOI: 10.3109/10715762.2012.695869] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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9
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Macrocyclic nickel(II) complexes: Synthesis, characterization, superoxide scavenging activity and DNA-binding. J Mol Struct 2012. [DOI: 10.1016/j.molstruc.2012.01.048] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Ramadan AEMM. Syntheses and characterization of new tetraazamacrocyclic copper(II) complexes as a dual functional mimic enzyme (catalase and superoxide dismutase). J COORD CHEM 2012. [DOI: 10.1080/00958972.2012.673719] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Abd El-Motaleb M. Ramadan
- a Chemistry Department, Faculty of Science , Kafr El-Sheikh University , Kafr El-Sheikh 33516 , Egypt
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11
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Lobana TS, Khanna S, Butcher RJ. 2-Benzoylpyridine thiosemicarbazone as a novel reagent for the single pot synthesis of dinuclear CuI–CuII complexes: formation of stable copper(ii)–iodide bonds. Dalton Trans 2012; 41:4845-51. [DOI: 10.1039/c2dt30068k] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Turan N, Topçu MF, Ergin Z, Sandal S, Tuzcu M, Akpolat N, Yılmaz B, Sekerci M, Karatepe M. Pro-oxidant and antiproliferative effects of the 1,3,4-thiadiazole–based Schiff base and its metal complexes. Drug Chem Toxicol 2011; 34:369-78. [DOI: 10.3109/01480545.2011.564177] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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13
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Palivan CG, Balasubramanian V, Goodman BA. Global Structure–Activity Analysis in Drug Development Illustrated for Active Cu/Zn Superoxide Dismutase Mimics. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200900808] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Cornelia G. Palivan
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland, Fax: +41‐612673855
| | - Vimalkumar Balasubramanian
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland, Fax: +41‐612673855
| | - Bernard A. Goodman
- Department of Environmental Research, Austrian Research Center Seibersdorf, 2444 Seibersdorf, Austria
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Discrimination of a copper complex to single- and double-stranded DNA as determined by electrochemical kinetics and thermodynamics. Bioelectrochemistry 2009; 75:32-6. [DOI: 10.1016/j.bioelechem.2008.12.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2008] [Revised: 12/30/2008] [Accepted: 12/31/2008] [Indexed: 11/23/2022]
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15
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Coşkun A, Yılmaz F, Akgemci EG. Synthesis, characterization and electrochemical investigation of a novel vic-dioxime ligand and its some transition metal complexes. J INCL PHENOM MACRO 2007. [DOI: 10.1007/s10847-007-9389-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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16
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Barik A, Mishra B, Kunwar A, Kadam RM, Shen L, Dutta S, Padhye S, Satpati AK, Zhang HY, Indira Priyadarsini K. Comparative study of copper(II)-curcumin complexes as superoxide dismutase mimics and free radical scavengers. Eur J Med Chem 2006; 42:431-9. [PMID: 17240482 DOI: 10.1016/j.ejmech.2006.11.012] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2006] [Revised: 11/18/2006] [Accepted: 11/20/2006] [Indexed: 11/28/2022]
Abstract
Two stoichiometrically different copper(II) complexes of curcumin (stoichiometry, 1:1 and 1:2 for copper:curcumin), were examined for their superoxide dismutase (SOD) activity, free radical-scavenging ability and antioxidant potential. Both the complexes are soluble in lipids and DMSO. The formation constants of the complexes were determined by voltammetry. EPR spectra of the complexes in DMSO at 77K showed that the 1:2 Cu(II)-curcumin complex is square planar and the 1:1 Cu(II)-curcumin complex is distorted orthorhombic. Cu(II)-curcumin complex (1:1) with larger distortion from square planar structure shows higher SOD activity. These complexes inhibit gamma-radiation induced lipid peroxidation in liposomes and react with DPPH acting as free radical scavengers. One-electron oxidation of the two complexes by radiolytically generated azide radicals in Tx-100 micellar solutions produced phenoxyl radicals, indicating that the phenolic moiety of curcumin in the complexes participates in free radical reactions. Depending on the structure, these two complexes possess different SOD activities, free radical neutralizing abilities and antioxidant potentials. In addition, quantum chemical calculations with density functional theory have been performed to support the experimental observations.
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Affiliation(s)
- Atanu Barik
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India
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17
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Spectral, Magnetic, Electrical and Thermal Studies on Malonyl bis(thiosemicarbazide) Complexes. TRANSIT METAL CHEM 2006. [DOI: 10.1007/s11243-005-6347-6] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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18
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Karatepe M, Karatas F. Antioxidant, pro-oxidant effect of the thiosemicarbazone derivative Schiff base (4-(1-phenylmethylcyclobutane-3-yl)-2-(2-hydroxybenzylidenehydrazino) thiazole) and its metal complexes on rats. Cell Biochem Funct 2006; 24:547-54. [PMID: 16143962 DOI: 10.1002/cbf.1266] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Adverse biological activities of thiosemicarbazone (TSC) and Schiff base (SB) derivatives have been widely studied in rats and in other animal species using different doses, times and routes of administration. However, there are few studies describing changes in some biochemical parameters in vivo which are indicative of oxidative stress in biological systems and of morphological changes of tissues. In this study, the rats were injected subcutaneously with a new thiosemicarbazone thiazole ring containing a Schiff base (LH) and its Cu(L)2 and Zn(L)2 complexes (25 mg kg(-1) body weight) and then sacrificed after 1, 2, 4, 8, 16, 32 and 64 days. The aim of this study was to determine the effect of the new compounds on the serum antioxidant vitamins (A, E, C), selenium (Se), malondialdehyde (MDA) levels, erythrocyte GSH-Px enzyme activity and morphological changes in the liver, kidney and adrenal gland tissues. It was observed that erythrocyte GSH-Px activity, serum MDA and vitamins A, E concentrations were statistically changed (p < 0.02), but serum levels of selenium, and vitamin C were not changed. In conclusion, the parameters measured show that Cu(L)2 caused considerable oxidative stress and Zn(L)2 behaved as an antioxidant. No oxidative stress in LH was observed compared to the control group.
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Affiliation(s)
- Mustafa Karatepe
- Department of Chemistry, Faculty of Science and Arts, Firat University, 23169 Elazig, Turkey.
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Barik A, Mishra B, Shen L, Mohan H, Kadam RM, Dutta S, Zhang HY, Priyadarsini KI. Evaluation of a new copper(II)-curcumin complex as superoxide dismutase mimic and its free radical reactions. Free Radic Biol Med 2005; 39:811-22. [PMID: 16109310 DOI: 10.1016/j.freeradbiomed.2005.05.005] [Citation(s) in RCA: 148] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2005] [Revised: 05/03/2005] [Accepted: 05/03/2005] [Indexed: 10/25/2022]
Abstract
A mononuclear (1:1) copper complex of curcumin, a phytochemical from turmeric, was synthesized and examined for its superoxide dismutase (SOD) activity. The complex was characterized by elemental analysis, IR, NMR, UV-VIS, EPR, mass spectroscopic methods and TG-DTA, from which it was found that a copper atom is coordinated through the keto-enol group of curcumin along with one acetate group and one water molecule. Cyclic voltammetric studies of the complex showed a reversible Cu(2+)/Cu(+) couple with a potential of 0.402 V vs NHE. The Cu(II)-curcumin complex is soluble in lipids and DMSO, and insoluble in water. It scavenges superoxide radicals with a rate constant of 1.97 x 10(5) M(-1) s(-1) in DMSO determined by stopped-flow spectrometer. Subsequent to the reaction with superoxide radicals, the complex was found to be regenerated completely, indicating catalytic activity in neutralizing superoxide radicals. Complete regeneration of the complex was observed, even when the stoichiometry of superoxide radicals was 10 times more than that of the complex. This was further confirmed by EPR monitoring of superoxide radicals. The SOD mimicking activity of the complex was determined by xanthine/xanthine oxidase assay, from which it has been found that 5 microg of the complex is equivalent to 1 unit of SOD. The complex inhibits radiation-induced lipid peroxidation and shows radical-scavenging ability. It reacts with DPPH radicals with rate constant 10 times less than that of curcumin. Pulse radiolysis-induced one-electron oxidation of the complex by azide radicals in TX-100 micellar solutions produced strongly absorbing ( approximately 500 nm) phenoxyl radicals, indicating that the phenolic moiety of curcumin remained intact on complexation with copper. The results confirm that the new Cu(II)-curcumin complex possesses SOD activity, free radical neutralizing ability, and antioxidant potential. Quantum chemical calculations with density functional theory have been performed to support the experimental observations.
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Affiliation(s)
- Atanu Barik
- Radiation Chemistry and Chemical Dynamics Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
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Chikate RC, Belapure AR, Padhye SB, West DX. Transition metal quinone–thiosemicarbazone complexes 1: Evaluation of EPR covalency parameters and redox properties of pseudo-square-planar copper(II)–naphthoquinone thiosemicarbazones. Polyhedron 2005. [DOI: 10.1016/j.poly.2005.02.011] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Colilla M, Mendiola M, Procopio J, Sevilla M. Application of a Carbon Paste Electrode Modified with a Schiff Base Ligand to Mercury Speciation in Water. ELECTROANAL 2005. [DOI: 10.1002/elan.200403198] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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22
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Ligand influence on the electrochemical behavior of some copper(II) thiosemicarbazone complexes. TRANSIT METAL CHEM 2005. [DOI: 10.1007/s11243-005-2362-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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John RP, Sreekanth A, Rajakannan V, Ajith T, Kurup MP. New copper(II) complexes of 2-hydroxyacetophenone N(4)-substituted thiosemicarbazones and polypyridyl co-ligands: structural, electrochemical and antimicrobial studies. Polyhedron 2004. [DOI: 10.1016/j.poly.2004.09.004] [Citation(s) in RCA: 125] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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24
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López-Torres E, Mendiola M, Pastor C, Procopio J. Diorganotin(IV) Complexes of a Cyclic Thiosemicarbazone Ligand: Crystal Structures of [SnPh2(C15H10N3S)Cl] and [SnMe2(C15H10N3S)2]. Eur J Inorg Chem 2003. [DOI: 10.1002/ejic.200300090] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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25
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López-Torres E, Mendiola MA, Rodrı́guez-Procopio J, Sevilla MT, Colacio E, Ma Moreno J, Sobrados I. Synthesis and characterisation of zinc, cadmium and mercury complexes of benzilbisthiosemicarbazone. Structure of cadmium derivative. Inorganica Chim Acta 2001. [DOI: 10.1016/s0020-1693(01)00607-7] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Spectroscopic and electrochemical properties of nickel(II), iron(III) and cobalt(II) complexes with benzilbisthiosemicarbazone — importance of working conditions and the metal salt used in the final complex. Polyhedron 2000. [DOI: 10.1016/s0277-5387(00)00505-2] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Synthesis, spectroscopic and cyclic voltammetry studies of copper(II) complexes with open chain, cyclic and a new macrocyclic thiosemicarbazones. Polyhedron 2000. [DOI: 10.1016/s0277-5387(99)00383-6] [Citation(s) in RCA: 117] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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