101
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102
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Gobi KV, Tokuda K, Ohsaka T. Monomolecular films of a nickel(II) pentaazamacrocyclic complex for the electrocatalytic oxidation of hydrogen peroxide at gold electrodes. J Electroanal Chem (Lausanne) 1998. [DOI: 10.1016/s0022-0728(97)00581-0] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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103
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The Briggs-Rauscher oscillatory reactions catalyzed by nickel macrocyclic complexes. ACTA ACUST UNITED AC 1998. [DOI: 10.1007/bf02475441] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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104
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McAuley A, Subramanian S. Synthesis, Spectroscopy, and Redox Behavior of the Binuclear Complex Cation [Ni2(6,6‘-spirobi(cyclam))]4+(cyclam = 1,4,8,11-Tetraazacyclotetradecane): Characteristics of a Transient Ni(II)−Ni(III) Species. Inorg Chem 1997. [DOI: 10.1021/ic970327+] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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105
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Taraszewska J, Rosłonek G. Kinetic and Thermodynamic Stability of Ni(III) Polyazacyclotetradecane Complexes. Supramol Chem 1997. [DOI: 10.1080/10610279708034956] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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106
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Driess M, Faulhaber M, Pritzkow H. Mehrzähnige cyclische Phosphorliganden mit einem Silicium-Phosphor-Rückgrat: Templatsynthese eines 1,4,7-Triphospha-2,3,5,6,8,9-hexasilacyclononans und eines 1,3,5,7,9,11-Hexaphospha-2,4,6,8,10,12-hexasilacyclododecans. Angew Chem Int Ed Engl 1997. [DOI: 10.1002/ange.19971091731] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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107
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Mizuta T, Okano A, Sasaki T, Nakazawa H, Miyoshi K. Palladium(II) and Platinum(II) Complexes of a Tetraphosphamacrocycle. X-ray Crystal Structures of Phosphorus Analogs of a (Tetramethylcyclam)metal Complex1. Inorg Chem 1997. [DOI: 10.1021/ic960700y] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tsutomu Mizuta
- Coordination Chemistry Laboratory, Institute for Molecular Science, Myodaiji, Okazaki 444, Japan, and Department of Chemistry, Faculty of Science, Hiroshima University, Kagamiyama, Higashi-Hiroshima 739, Japan
| | - Akihiro Okano
- Coordination Chemistry Laboratory, Institute for Molecular Science, Myodaiji, Okazaki 444, Japan, and Department of Chemistry, Faculty of Science, Hiroshima University, Kagamiyama, Higashi-Hiroshima 739, Japan
| | - Tsutomu Sasaki
- Coordination Chemistry Laboratory, Institute for Molecular Science, Myodaiji, Okazaki 444, Japan, and Department of Chemistry, Faculty of Science, Hiroshima University, Kagamiyama, Higashi-Hiroshima 739, Japan
| | - Hiroshi Nakazawa
- Coordination Chemistry Laboratory, Institute for Molecular Science, Myodaiji, Okazaki 444, Japan, and Department of Chemistry, Faculty of Science, Hiroshima University, Kagamiyama, Higashi-Hiroshima 739, Japan
| | - Katsuhiko Miyoshi
- Coordination Chemistry Laboratory, Institute for Molecular Science, Myodaiji, Okazaki 444, Japan, and Department of Chemistry, Faculty of Science, Hiroshima University, Kagamiyama, Higashi-Hiroshima 739, Japan
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108
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Mandal S, Bose RN, Reed JW, Gould ES. Electron Transfer. 129. Copper Catalysis in the Thiol Reduction of Oxime-Bound Nickel(IV)(1). Inorg Chem 1996; 35:3159-3162. [PMID: 11666512 DOI: 10.1021/ic951520b] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Solutions of the Ni(IV) complex of the dianion of 2,6-diacetylpyridine dioxime (chelate II in text) are reduced very slowly by 2-aminoethanethiol at pH 2.3-3.0, but this reaction is catalyzed dramatically and specifically by dissolved copper, with Cu(I) the active reductant. When the [thiol]/[Ni(IV)] ratio exceeds 1.6, each Ni(IV) oxidizes two molecules of thiol, forming Ni(II) and R(2)S(2). At low concentrations of catalyst and reductant, reaction profiles are almost exponential, but at higher concentrations of either, curves become progressively more nearly linear. Reactions are sharply retarded by increases in acidity. Profiles for 14 runs, carried out with [H(+)] = 0.001-0.0040 M, [Ni(IV)] = (0.94-1.2) x 10(-)(5) M, [thiol] = (2.0-32) x 10(-)(4) M, and [Cu(2+)] = (2.5-80) x 10(-)(6)M, are consistent with a reaction sequence (eqs 2-10 in text) in which Cu(I) is generated in competing homolyses of the complexes Cu(II)(SRH) and Cu(II)(SRH)(2). Reduction of Ni(IV) appears then to proceed through a Ni(IV)Cu(I) adduct, which can undergo electron transfer (yielding Ni(III) and Cu(II)), either in a unimolecular fashion or, alternatively, as a result of attack by a second Cu(I) species. The Ni(IV)Cu(I) + Cu(I) process is reflected in approach to second-order dependences on [Cu(II)] and [thiol] (which generate Cu(I)) at high concentrations of these reagents. Reductions of the Ni(III) intermediate are taken to be much more rapid than those of Ni(IV). Kinetic trends in the present system stand in contrast to the more familiar catalytic patterns such as those seen when the same combination of thiol and catalyst is used to reduce superoxo complexes of cobalt(III). With the latter reactions, decay profiles for the oxidant tend to be exponential at high reagent concentrations but approach linearity at low.
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Affiliation(s)
- Subrata Mandal
- Department of Chemistry, Kent State University, Kent, Ohio 44242
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109
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Study of the reactions of palladium(II) macrocyclic tetraamine complexes with hydroxyl and methyl radicals. Inorganica Chim Acta 1996. [DOI: 10.1016/0020-1693(96)05051-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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110
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Waltz WL, Lilie J, Chandrasekhar S, Woo D, Brown K. Study of the Reactions of Platinum Macrocyclic Complex Ions with Free Radicals Formed by Pulse Radiolysis of Aqueous Media. Inorg Chem 1996; 35:124-130. [PMID: 11666173 DOI: 10.1021/ic950744r] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The near-diffusion-controlled reactions of hydroxyl radical, hydrated electron, and hydrogen atom with platinum macrocyclic complex ions in aqueous media have been studied using pulse radiolysis in conjunction with UV-visible absorption and conductivity detection. The hydrated electron and hydrogen atom react with trans-[Pt(cyclam)(Cl)(2)](2+) where cyclam is 1,4,8,11-tetraazacyclotetradecane to yield platinum(III) transients that exhibit intense absorption peaks in the 280-300 nm region; however in the case of the H-atom, the reaction involves a competition between chloride abstraction and a minor process, suggested to be attack on the organic ligand. The platinum(III) products are kinetically labile toward loss of chloro ligands, but these reactions are reversible in the presence of added KCl. The reactions of hydroxyl radical with [Pt(cyclam)](2+) and with [Pt(tmc)](2+), where tmc is 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane, lead to platinum(III) intermediates absorbing in the 250-300 nm region. Depending on the presence or absence of added KCl and on the pH, the platinum(III) cyclam systems can react to form a product(s) exhibiting absorption peaks near 330 and 455 nm, and this species is proposed to be a long-lived amidoplatinum(III) complex. In support of this proposal is the observation that the tmc system does not give rise to a similar visible-absorbing product. The interrelations of the cyclam-based transients through acid-base, chloro-substitution and water-elimination processes are discussed.
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Affiliation(s)
- W. L. Waltz
- Department of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 5C9, and the Hahn-Meitner-Institut GmbH Berlin, Glienicker Strasse 100, D-14109 Berlin, Germany
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Zilbermann I, Winnik M, Sagiv D, Rotman A, Cohen H, Meyerstein D. Properties of monovalent nickel complexes with tetraaza-macrocyclic ligands in aqueous solutions. Inorganica Chim Acta 1995. [DOI: 10.1016/0020-1693(96)83104-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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112
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Maroney MJ. The Role of Nickel in Hydrogenases: Implications for a Heterodinuclear Active Site. COMMENT INORG CHEM 1995. [DOI: 10.1080/02603599508032712] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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113
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Rybak-akimova EV, Lampeka YD. A new ditopic receptor containing tetraazamacrocyclic and crown ether fragments. Synthesis, spectral characteristics, and redox behavior. Supramol Chem 1995. [DOI: 10.1080/10610279508028939] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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114
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Albracht SP. Nickel hydrogenases: in search of the active site. BIOCHIMICA ET BIOPHYSICA ACTA 1994; 1188:167-204. [PMID: 7803444 DOI: 10.1016/0005-2728(94)90036-1] [Citation(s) in RCA: 341] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- S P Albracht
- E.C. Slater Institute, BioCentrum Amsterdam, University of Amsterdam, The Netherlands
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115
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Linn DE, Rumage SD, Grutsch JL. Reactions of [NiIII(cyclam)] with aqueous sulfur dioxide: Exhibition of a deuterium isotope effect and catalysis by chloride and bromide. INT J CHEM KINET 1993. [DOI: 10.1002/kin.550250608] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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116
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Kuz'menko AI, Rosokha SV, Lampeka YD, Kovtun GA. Complexes of Ni2+ with dioxotetramines and macrocyclic tetraaza-ligands as inhibitors of oxidation of dialkyl sulfoxides. Russ Chem Bull 1993. [DOI: 10.1007/bf00698940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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117
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Effects of axial anions and solvent on the redox behaviour of nickel complexes with C-functionalized tetraazamacrocycles. J Electroanal Chem (Lausanne) 1993. [DOI: 10.1016/0022-0728(93)80490-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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118
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Synthesis and characteristics of the redox behavior of a ditopic compound contaiing tetraaza macrocyclic and crown ether fragments. THEOR EXP CHEM+ 1993. [DOI: 10.1007/bf00573926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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119
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McKee V. Macrocyclic Complexes as Models for Nonporphine Metalloproteins. ADVANCES IN INORGANIC CHEMISTRY 1993. [DOI: 10.1016/s0898-8838(08)60186-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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120
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Effect of the coordination number of the nickel(II) ion on the kinetic characteristics of the oxidation of its macrocyclic complexes by peroxodisulfate ions. THEOR EXP CHEM+ 1993. [DOI: 10.1007/bf00532107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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121
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Sonnberger B, Hühn P, Waßerburger A, Wasgestian F. Base promoted decomposition of bis(1,4,7-triazacyclononane)nickel(III) in aqueous solution. Inorganica Chim Acta 1992. [DOI: 10.1016/s0020-1693(00)82961-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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122
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De Santis G, Di Casa M, Fabbrizzi L, Forlini A, Licchelli M, Mangano C, Mocák J, Pallavicini P, Poggi A, Seghi B. Electrons and Ions Moving Across Liquid Membranes. J COORD CHEM 1992. [DOI: 10.1080/00958979209407943] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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123
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Martin EM, Bereman RD. Synthesis and characterization of square planar and pseudo-tetrahedral M(II)N2S2. Inorganica Chim Acta 1991. [DOI: 10.1016/s0020-1693(00)80376-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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124
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Escuer A, Ribas J, Vicente R, Faulmann C, de Montauzon D, Cassoux P. Pentacoordinate nickel(II) complexes with one 1,1-dithio and one macrocyclic ligand. Electro-oxidation to nickel(III) in solution. Polyhedron 1991. [DOI: 10.1016/s0277-5387(00)86027-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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125
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Martin EM, Bereman RD, Dorfman J. An investigation into the electronic and structural properties of nickel complexes of tetradentate N2S2 ligands. Inorganica Chim Acta 1990. [DOI: 10.1016/s0020-1693(00)84851-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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126
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Nordlind K. Biological effects of mercuric chloride, nickel sulphate and nickel chloride. PROGRESS IN MEDICINAL CHEMISTRY 1990; 27:189-233. [PMID: 2217825 DOI: 10.1016/s0079-6468(08)70292-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- K Nordlind
- Department of Dermatology, Karolinska Hospital, Stockholm, Sweden
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127
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Ochocki J, Chaudhuri P, Driessen W, De Graaf R, Hulsbergen F, Reedijk J. Synthesis, spectroscopy and magnetism of mixed-valence Ni(II)–Ni(III) compounds with (benz)imidazolethioether, acetates and dithiolates as ligands. Crystal structure of (acetato)(1,6-bis(benzimidazol-2-yl)-2,5-dithiahexane)nickel(II) bis(toluene-3,4-dithiolato)niccolate(III). Inorganica Chim Acta 1990. [DOI: 10.1016/s0020-1693(00)83932-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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128
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129
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Khan JA, Chandraiah U, Kumar BK, Kandlikar S. Kinetics of Electron Transfer from Cyclic Ketones to Ni(IV) Periodate Complex in Aqueous Alkaline Medium. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1989. [DOI: 10.1246/bcsj.62.1300] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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130
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Yamashita M, Miyamae H. The crystal structure of a nickel(IIl) complex with meso-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane, [NiIIICl2(Me6[14]aneN4)]ClO4. Inorganica Chim Acta 1989. [DOI: 10.1016/s0020-1693(00)90370-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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131
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Rosokha SV, Lampeka YD. Oxidation of tetraaza macrocyclic complexes of nickel(II) with peroxobisulfate ions. THEOR EXP CHEM+ 1989. [DOI: 10.1007/bf00534421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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132
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Abstract
The toxicity and carcinogenicity of nickel compounds are considered in three broad categories: (1) systemic toxicology, (2) molecular toxicology, and (3) carcinogenicity. The systemic toxicity of nickel compounds is examined based upon human and animal studies. The major organs affected are discussed in three categories: (1) kidney, (2) immune system, and (3) other organs. The second area of concentration is molecular toxicology, which will include a discussion of the chemistry of nickel, its binding to small and large molecular weight ligands, and, finally, its cellular effects. The third major area involves a discussion of the carcinogenicity and genotoxicity of nickel compounds. This section focuses on mechanisms, using studies conducted in vivo and in vitro. It also includes a discussion of the assessment of the carcinogenicity of nickel compounds.
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Affiliation(s)
- T P Coogan
- Institute of Environmental Medicine, New York University Medical Center, New York
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133
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Fauque G, Peck HD, Moura JJ, Huynh BH, Berlier Y, DerVartanian DV, Teixeira M, Przybyla AE, Lespinat PA, Moura I. The three classes of hydrogenases from sulfate-reducing bacteria of the genus Desulfovibrio. FEMS Microbiol Rev 1988; 4:299-344. [PMID: 3078655 DOI: 10.1111/j.1574-6968.1988.tb02748.x] [Citation(s) in RCA: 163] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Three types of hydrogenases have been isolated from the sulfate-reducing bacteria of the genus Desulfovibrio. They differ in their subunit and metal compositions, physico-chemical characteristics, amino acid sequences, immunological reactivities, gene structures and their catalytic properties. Broadly, the hydrogenases can be considered as 'iron only' hydrogenases and nickel-containing hydrogenases. The iron-sulfur-containing hydrogenase ([Fe] hydrogenase) contains two ferredoxin-type (4Fe-4S) clusters and an atypical iron-sulfur center believed to be involved in the activation of H2. The [Fe] hydrogenase has the highest specific activity in the evolution and consumption of hydrogen and in the proton-deuterium exchange reaction and this enzyme is the most sensitive to CO and NO2-. It is not present in all species of Desulfovibrio. The nickel-(iron-sulfur)-containing hydrogenases [( NiFe] hydrogenases) possess two (4Fe-4S) centers and one (3Fe-xS) cluster in addition to nickel and have been found in all species of Desulfovibrio so far investigated. The redox active nickel is ligated by at least two cysteinyl thiolate residues and the [NiFe] hydrogenases are particularly resistant to inhibitors such as CO and NO2-. The genes encoding the large and small subunits of a periplasmic and a membrane-bound species of the [NiFe] hydrogenase have been cloned in Escherichia (E.) coli and sequenced. Their derived amino acid sequences exhibit a high degree of homology (70%); however, they show no obvious metal-binding sites or homology with the derived amino acid sequence of the [Fe] hydrogenase. The third class is represented by the nickel-(iron-sulfur)-selenium-containing hydrogenases [( NiFe-Se] hydrogenases) which contain nickel and selenium in equimolecular amounts plus (4Fe-4S) centers and are only found in some species of Desulfovibrio. The genes encoding the large and small subunits of the periplasmic hydrogenase from Desulfovibrio (D.) baculatus (DSM 1743) have been cloned in E. coli and sequenced. The derived amino acid sequence exhibits homology (40%) with the sequence of the [NiFe] hydrogenase and the carboxy-terminus of the gene for the large subunit contains a codon (TGA) for selenocysteine in a position homologous to a codon (TGC) for cysteine in the large subunit of the [NiFe] hydrogenase. EXAFS and EPR studies with the 77Se-enriched D. baculatus hydrogenase indicate that selenium is a ligand to nickel and suggest that the redox active nickel is ligated by at least two cysteinyl thiolate and one selenocysteine selenolate residues.(ABSTRACT TRUNCATED AT 400 WORDS)
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Affiliation(s)
- G Fauque
- Section Enzymologie et Biochimie Bactérienne, ARBS, CEN Cadarache, Saint-Paul-Lez-Durance, France
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135
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136
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Vicente R, Ribas J, Solans X, Font-Altaba M, Mari A, de Loth P, Cassoux P. Electrochemical, EPR, and crystal structure studies on mixed-ligand 4,5-dimercapto-l,3-dithia-2-thione phosphine complexes of nickel, palladium and platinum, M(dmit)(dppe) and Pt(dmit)(PPh3)2. Inorganica Chim Acta 1987. [DOI: 10.1016/s0020-1693(00)81747-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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137
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Chandler DJ, Jones RA, Whittlesey BR. THE JAHN-TELLER EFFECT IN A TRIGONAL BIPYRAMIDAL Ni(III) COMPLEX; SYNTHESIS AND X-RAY CRYSTAL STRUCTURE OFtrans-NiI3(PMe3)2. J COORD CHEM 1987. [DOI: 10.1080/00958978708079802] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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138
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Mentasti E, Kirschenbaum LJ. Kinetics and mechanisms of the oxidation of Ni(II) and Cu(II) macrocycles by aquasilver(II) in acidic perchlorate media. Inorganica Chim Acta 1987. [DOI: 10.1016/s0020-1693(00)85909-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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139
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140
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Shen W, Lunsford JH. Reaction of trans-dichlorobis(ethylenediamine)nickel(III) in aqueous hydrochloric acid. Inorganica Chim Acta 1985. [DOI: 10.1016/s0020-1693(00)86759-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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141
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Johnson MK, Zambrano IC, Czechowski MH, Peck HD, DerVartanian DV, LeGall J. Low temperature magnetic circular dichroism spectroscopy as a probe for the optical transitions of paramagnetic nickel in hydrogenase. Biochem Biophys Res Commun 1985; 128:220-5. [PMID: 2985072 DOI: 10.1016/0006-291x(85)91667-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A partially-purified sample of hydrogenase from Methanobacterium thermoautotrophicum (delta H strain) has been investigated by optical absorption, magnetic circular dichroism and electron paramagnetic resonance spectroscopy. Variable temperature magnetic circular dichroism studies reveal, for the first time, the optical transitions associated with the Ni(III) center in the oxidized enzyme. Low temperature magnetic circular dichroism spectroscopy provides a new method of assessing both the coordination environment of Ni in hydrogenase and the appropriateness of inorganic model complexes.
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142
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Yamashita M, Murase I. Moisture affected disproportionation reaction of a Ni(III) complex to a Ni(II)Ni(IV) mixed-valence complex. Inorganica Chim Acta 1985. [DOI: 10.1016/s0020-1693(00)86569-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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143
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van der Zwaan JW, Albracht SP, Fontijn RD, Slater EC. Monovalent nickel in hydrogenase from Chromatium vinosum. Light sensitivity and evidence for direct interaction with hydrogen. FEBS Lett 1985; 179:271-7. [PMID: 2981705 DOI: 10.1016/0014-5793(85)80533-0] [Citation(s) in RCA: 130] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Redox titrations with hydrogenase from Chromatium vinosum show that its nickel ion can exist in 3, possibly 4, different redox states: the 3+, 2+, 1+ and possibly a zero valent state. The 1+ state is unstable: oxidation to Ni(II) occurs unless H2 gas is present. The Ni(I) coordination, but not that of Ni(III), is highly light sensitive. A photoreaction occurs on illumination. It is irreversible below 77 K, but reversible at 200 K. The rate of this photodissociation reaction in 2H2O is nearly 6-times slower than in H2O, indicating the breakage of a nickel-hydrogen bond. This forms the first evidence for an H atom in the direct coordination sphere of Ni in hydrogenase and for the involvement of this metal in the reaction with hydrogen.
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