1
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Kokubo Y, Tsuzuki K, Sugiura H, Yomura S, Wasada-Tsutsui Y, Ozawa T, Yanagisawa S, Kubo M, Takeyama T, Yamaguchi T, Shimazaki Y, Kugimiya S, Masuda H, Kajita Y. Syntheses, Characterizations, Crystal Structures, and Protonation Reactions of Dinitrogen Chromium Complexes Supported with Triamidoamine Ligands. Inorg Chem 2023; 62:5320-5333. [PMID: 36972224 DOI: 10.1021/acs.inorgchem.2c01561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
Abstract
A novel dinitrogen-dichromium complex, [{Cr(LBn)}2(μ-N2)] (1), has been prepared from reaction of CrCl3 with a lithiated triamidoamine ligand (Li3LBn) under dinitrogen. The X-ray crystal structure analysis of 1 revealed that it is composed of two independent dimeric Cr complexes bridged by N2 in the unit cell. The bridged N-N bond lengths (1.188(4) and 1.185(7) Å) were longer than the free dinitrogen molecule. The elongations of N-N bonds in 1 were also supported by the fact that the ν(N-N) stretching vibration at 1772 cm-1 observed in toluene is smaller than the free N2. Complex 1 was identified to be a 5-coordinated high spin Cr(IV) complex by Cr K-edge XANES measurement. The 1H NMR spectrum and temperature dependent magnetic susceptibility of 1 indicated that complex 1 is in the S = 1 ground state, in which two Cr(IV) ions and unpaired electron spins of the bridging N22- ligand are strongly antiferromagnetically coupled. Reaction of complex 1 with 2.3 equiv of Na or K gave chromium complexes with N2 between the Cr ion and the respective alkali metal ion, [{CrNa(LBn)(N2)(Et2O)}2] (2) and [{CrK(LBn)(N2)}4(Et2O)2] (3), respectively. Furthermore, the complexes 2 and 3 reacted with 15-crown-5 and 18-crown-6 to form the respective crown-ether adducts, [CrNa(LBn)(N2)(15-crown-5)] (4) and [CrK(LBn)(N2)(18-crown-6)] (5). The XANES measurements of complexes 2, 3, 4, and 5 revealed that they are high spin Cr(IV) complexes like complex 1. All complexes reacted with a reducing agent and a proton source to form NH3 and/or N2H4. The yields of these products in the presence of K+ were higher than those in the presence of Na+. The electronic structures and binding properties of 1, 2, 3, 4, and 5 were evaluated and discussed based on their DFT calculations.
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2
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Zhang S, Lan H, Cui Y, An X, Liu H, Qu J. Insight into the Key Role of Cr Intermediates in the Efficient and Simultaneous Degradation of Organic Contaminants and Cr(VI) Reduction via g-C 3N 4-Assisted Photocatalysis. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:3552-3563. [PMID: 35212521 DOI: 10.1021/acs.est.1c08440] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Photocatalysis provides an impetus for the synergetic removal of Cr(VI) and organic contaminants, but the generation of Cr intermediates and their potential oxidizability may be overlooked in pollutant conversion. Herein, the Cr intermediates in the Cr(VI) reduction process were emphasized in Cr(VI)/bisphenol A (BPA) by using graphitic carbon nitride as a photocatalyst. The active species for BPA photodegradation in the BPA system and Cr(VI)/BPA system suggested that the Cr(VI) reduction process indeed promotes BPA photodegradation. Electron paramagnetic resonance (EPR) of Cr complexes and in situ variable-temperature EPR analysis demonstrated Cr(V) intermediate (g = 1.978) generation in Cr(VI) reduction and its oxidization for BPA degradation in photocatalysis. By adding the electron donor Na2SO3, BPA degradation was induced in Cr(VI)/BPA solution, further confirming the positive effect of Cr(V). Moreover, the difference in BPA degradation products in the BPA/air, Cr(VI)/BPA/air, and Cr(VI)/BPA/Ar systems indirectly explained why the Cr(V) intermediate was involved in BPA degradation. Density functional theory calculations revealed that photogenerated electrons can reduce the free energy (0.98 eV) of converting Cr(VI) into Cr(V), which can facilitate the subsequent Cr(V) oxidation step for BPA degradation. This work contributes to the exploration of the Cr(VI) reduction process and the synergistic removal of organic pollutants in Cr(VI)/organics systems.
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Affiliation(s)
- Shun Zhang
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Huachun Lan
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Yuqi Cui
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Xiaoqiang An
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Huijuan Liu
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Jiuhui Qu
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
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3
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Monico L, Cotte M, Vanmeert F, Amidani L, Janssens K, Nuyts G, Garrevoet J, Falkenberg G, Glatzel P, Romani A, Miliani C. Damages Induced by Synchrotron Radiation-Based X-ray Microanalysis in Chrome Yellow Paints and Related Cr-Compounds: Assessment, Quantification, and Mitigation Strategies. Anal Chem 2020; 92:14164-14173. [PMID: 32955250 DOI: 10.1021/acs.analchem.0c03251] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Synchrotron radiation (SR)-based X-ray methods are powerful analytical tools for several purposes. They are widely used to probe the degradation mechanisms of inorganic artists' pigments in paintings, including chrome yellows (PbCr1-xSxO4; 0 ≤ x ≤ 0.8), a class of compounds often found in Van Gogh masterpieces. However, the high intensity and brightness of SR beams raise important issues regarding the potential damage inflicted on the analyzed samples. A thorough knowledge of the SR X-ray sensitivity of each class of pigment in the painting matrix is therefore required to find analytical strategies that seek to minimize the damage for preserving the integrity of the analyzed samples and to avoid data misinterpretation. Here, we employ a combination of Cr K-edge X-ray absorption near-edge structure spectroscopy, Cr-Kβ X-ray emission spectroscopy, and X-ray diffraction to monitor and quantify the effects of SR X-rays on the stability of chrome yellows and related Cr compounds and to define mitigation strategies. We found that the SR X-ray beam exposure induces changes in the oxidation state and local coordination environment of Cr ions and leads to a loss of the compound's crystalline structure. The extent of X-ray damage depends on some intrinsic properties of the samples (chemical composition of the pigment and the presence/absence and nature of the binder). It can be minimized by optimizing the overall fluence/dose released to the samples and by working in vacuum and under cryogenic conditions.
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Affiliation(s)
- Letizia Monico
- CNR-SCITEC, Via Elce di Sotto 8, 06123 Perugia, Italy.,SMAArt Centre and Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy.,AXES Research Group, NANOlab Centre of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Marine Cotte
- ESRF, Avenue des Martyrs 71, 38000 Grenoble, France.,LAMS, CNRS UMR 8220, Sorbonne Université, UPMC Univ Paris 06, Place Jussieu 4, 75005 Paris, France
| | - Frederik Vanmeert
- AXES Research Group, NANOlab Centre of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium.,Laboratories of the Royal Institute of Cultural Heritage (KIK-IRPA), Parc du Cinquantenaire 1, 1000 Bruxelles, Belgium
| | - Lucia Amidani
- ESRF, Avenue des Martyrs 71, 38000 Grenoble, France.,HZDR, Institute of Resource Ecology, Rossendorf Beamline at the ESRF, 01314 Dresden, Germany
| | - Koen Janssens
- AXES Research Group, NANOlab Centre of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium.,Rijksmuseum, Conservation & Restoration-Scientific Research, Hobbemastraat 22, 1071 ZC Amsterdam, The Netherlands
| | - Gert Nuyts
- AXES Research Group, NANOlab Centre of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | | | | | | | - Aldo Romani
- CNR-SCITEC, Via Elce di Sotto 8, 06123 Perugia, Italy.,SMAArt Centre and Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
| | - Costanza Miliani
- CNR-ISPC, Via Cardinale Guglielmo Sanfelice 8, 80134 Napoli, Italy
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4
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Dong H, Wei G, Cao T, Shao B, Guan X, Strathmann TJ. Insights into the Oxidation of Organic Cocontaminants during Cr(VI) Reduction by Sulfite: The Overlooked Significance of Cr(V). ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:1157-1166. [PMID: 31858777 DOI: 10.1021/acs.est.9b03356] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Literature works reported that organic cocontaminants could be degraded during Cr(VI), a contaminant, reduction by sulfite (Cr(VI)/sulfite process). However, the role of Cr(V) and Cr(IV) intermediates in the Cr(VI)/sulfite process has been overlooked. In this study, we confirmed the generation of Cr(V) and proposed a new mechanism for the decomposition of coexisting organic contaminants during Cr(VI)/sulfite reactions occurring in oxygenated solutions at pHini 4.0 with the molar ratio of sulfite to Cr(VI) of 10.0. UV-visible and electron paramagnetic resonance (EPR) spectra indicate that Cr(V) was the predominant Cr intermediates in oxygenated solutions, while Cr(IV) accumulated in deoxygenated solutions. The contribution of Cr(V) to the degradation of organic contaminants was verified by the EPR spectra collected at 2 K and using methyl phenyl sulfoxide as a probe compound. Both Cr(V) and SO4•- contributed to the decomposition of organic contaminants in oxygenated solutions, with the relative contributions from each species being strongly dependent on properties of the target organic cocontaminants. The key mechanisms responsible for Cr(V) accumulation were supported by DFT calculations, and the degradation kinetics of organic cocontaminants was simulated with the program Kintecus 6.51. This work advances the fundamental understanding of the oxidative transformation of coexisting organic contaminants in this process.
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Affiliation(s)
- Hongyu Dong
- Shanghai Institute of Pollution Control and Ecological Security , Shanghai 200092 , China
| | | | | | - Binbin Shao
- Shanghai Institute of Pollution Control and Ecological Security , Shanghai 200092 , China
| | - Xiaohong Guan
- Shanghai Institute of Pollution Control and Ecological Security , Shanghai 200092 , China
| | - Timothy J Strathmann
- Department of Civil & Environmental Engineering , Colorado School of Mines , Golden , Colorado 80401 , United States
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5
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Garai A, Sobottka S, Schepper R, Sinha W, Bauer M, Sarkar B, Kar S. Chromium Complexes with Oxido and Corrolato Ligands: Metal-Based Redox Processes versus Ligand Non-Innocence. Chemistry 2018; 24:12613-12622. [PMID: 29882607 DOI: 10.1002/chem.201801452] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 06/06/2018] [Indexed: 11/09/2022]
Abstract
Metal- versus ligand-centered redox processes and the effects of substituents on the ligands on the spectroscopic properties of the metal complexes are at the heart of research on metal complexes with non-innocent ligands. This work presents three examples of chromium complexes that contain both oxido and corrolato ligands, with the substituents on the corrolato ligands being different in the three cases. Combined X-ray crystallographic, electrochemical, UV/Vis/NIR/EPR spectroelectrochemical, and EXAFS/XANES measurements, together with DFT calculations, have been used to probe the complexes in three different redox forms. This combined approach makes it possible to address questions related to chromium- versus corrolato-centered redox processes, and the accessibility (or not) of CrIV , CrV , and CrVI in these complexes, as well as their spin states. To the best of our knowledge, these are the first EXAFS/XANES investigations on Cr-corrolato complexes in different redox forms, and hence these data should set benchmarks for future investigations on such complexes by this method.
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Affiliation(s)
- Antara Garai
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, Khordha, 752050, India
| | - Sebastian Sobottka
- Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, 14195, Berlin, Germany
| | - Rahel Schepper
- Universität Paderborn, Naturwissenschaftliche Fakultät, Department Chemie, Warburger Straße 100, 33098, Paderborn, Germany
| | - Woormileela Sinha
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, Khordha, 752050, India
| | - Matthias Bauer
- Universität Paderborn, Naturwissenschaftliche Fakultät, Department Chemie, Warburger Straße 100, 33098, Paderborn, Germany
| | - Biprajit Sarkar
- Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, 14195, Berlin, Germany
| | - Sanjib Kar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, Khordha, 752050, India.,Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, 400094, India
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6
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Swiatkowska I, Mosselmans JFW, Geraki T, Wyles CC, Maleszewski JJ, Henckel J, Sampson B, Potter DB, Osman I, Trousdale RT, Hart AJ. Synchrotron analysis of human organ tissue exposed to implant material. J Trace Elem Med Biol 2018; 46:128-137. [PMID: 29413102 DOI: 10.1016/j.jtemb.2017.12.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 12/19/2017] [Accepted: 12/21/2017] [Indexed: 11/16/2022]
Abstract
BACKGROUND Orthopaedic implants made of cobalt-chromium alloy undergo wear and corrosion that can lead to deposition of cobalt and chromium in vital organs. Elevated cardiac tissue cobalt levels are associated with myocardial injury while chromium is a well-established genotoxin. Though metal composition of tissues surrounding hip implants has been established, few investigators attempted to characterize the metal deposits in systemic tissues of total joint arthroplasty patients. METHODS We report the first use of micro-X-ray fluorescence coupled with micro-X-ray absorption spectroscopy to probe distribution and chemical form of cobalt, chromium and titanium in postmortem samples of splenic, hepatic and cardiac tissue of patients with metal-on-polyethylene hip implants (n = 5). RESULTS Majority of the cobalt was in the 2+ oxidation state, while titanium was present exclusively as titanium dioxide, in either rutile or anatase crystal structure. Chromium was found in a range of forms including a highly oxidised, carcinogenic species (CrV/VI), which has never been identified in human tissue before. CONCLUSIONS Carcinogenic forms of chromium might arise in vital organs of total joint arthroplasty patients. Further studies are warranted with patients with metal-on-metal implants, which tend to have an increased release of cobalt and chromium compared to metal-on-polyethylene hips.
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Affiliation(s)
- Ilona Swiatkowska
- Institute of Orthopaedics and Musculoskeletal Science, University College London, HA7 4LP Stanmore, UK.
| | - J Fred W Mosselmans
- Diamond Light Source, Harwell Science and Innovation Campus, OX11 0DE Didcot, UK
| | - Tina Geraki
- Diamond Light Source, Harwell Science and Innovation Campus, OX11 0DE Didcot, UK
| | - Cody C Wyles
- Mayo Clinic, 200 1st Street SW, Rochester, MN, USA
| | | | - Johann Henckel
- Royal National Orthopaedic Hospital, HA7 4LP Stanmore, UK
| | - Barry Sampson
- Trace Element Laboratory, Department of Clinical Chemistry, Charing Cross Hospital, Imperial College NHS Healthcare Trust, W6 8RF London, UK
| | - Dominic B Potter
- Departament of Chemistry, University College London, WC1H 0AJ London, UK
| | - Ibtisam Osman
- Trace Element Laboratory, Department of Clinical Chemistry, Charing Cross Hospital, Imperial College NHS Healthcare Trust, W6 8RF London, UK
| | | | - Alister J Hart
- Institute of Orthopaedics and Musculoskeletal Science, University College London, HA7 4LP Stanmore, UK; Royal National Orthopaedic Hospital, HA7 4LP Stanmore, UK
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7
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Spectroscopic characterization of genotoxic chromium(V) peptide complexes: Oxidation of Chromium(III) triglycine, tetraglycine and pentaglycine complexes. J Inorg Biochem 2016; 162:227-237. [DOI: 10.1016/j.jinorgbio.2016.06.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 06/07/2016] [Accepted: 06/14/2016] [Indexed: 11/23/2022]
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8
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Monico L, Janssens K, Cotte M, Sorace L, Vanmeert F, Brunetti BG, Miliani C. Chromium speciation methods and infrared spectroscopy for studying the chemical reactivity of lead chromate-based pigments in oil medium. Microchem J 2016. [DOI: 10.1016/j.microc.2015.08.028] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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9
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Wrobel K, Corrales Escobosa AR, Gonzalez Ibarra AA, Mendez Garcia M, Yanez Barrientos E, Wrobel K. Mechanistic insight into chromium(VI) reduction by oxalic acid in the presence of manganese(II). JOURNAL OF HAZARDOUS MATERIALS 2015; 300:144-152. [PMID: 26177490 DOI: 10.1016/j.jhazmat.2015.06.066] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 05/06/2015] [Accepted: 06/30/2015] [Indexed: 06/04/2023]
Abstract
Over the past few decades, reduction of hexavalent chromium (Cr(VI)) has been studied in many physicochemical contexts. In this research, we reveal the mechanism underlying the favorable effect of Mn(II) observed during Cr(VI) reduction by oxalic acid using liquid chromatography with spectrophotometric diode array detector (HPLC-DAD), nitrogen microwave plasma atomic emission spectrometry (HPLC-MP-AES), and high resolution mass spectrometry (ESI-QTOFMS). Both reaction mixtures contained potassium dichromate (0.67 mM Cr(VI)) and oxalic acid (13.3mM), pH 3, one reaction mixture contained manganese sulfate (0.33 mM Mn(II)). In the absence of Mn(II) only trace amounts of reaction intermediates were generated, most likely in the following pathways: (1) Cr(VI)→ Cr(IV) and (2) Cr(VI)+Cr(IV)→ 2Cr(V). In the presence of Mn(II), the active reducing species appeared to be Mn(II) bis-oxalato complex (J); the proposed reaction mechanism involves a one-electron transfer from J to any chromium compound containing CrO bond, which is reduced to CrOH, and the generation of Mn(III) bis-oxalato complex (K). Conversion of K to J was observed, confirming the catalytic role of Mn(II). Since no additional acidification was required, the results obtained in this study may be helpful in designing a new, environmentally friendly strategy for the remediation of environments contaminated with Cr(VI).
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Affiliation(s)
- Katarzyna Wrobel
- Chemistry Department, Division of Natural and Exact Sciences, University of Guanajuato, L. de Retana 5, 36000 Guanajuato, Mexico
| | - Alma Rosa Corrales Escobosa
- Chemistry Department, Division of Natural and Exact Sciences, University of Guanajuato, L. de Retana 5, 36000 Guanajuato, Mexico
| | - Alan Alexander Gonzalez Ibarra
- Chemistry Department, Division of Natural and Exact Sciences, University of Guanajuato, L. de Retana 5, 36000 Guanajuato, Mexico
| | - Manuel Mendez Garcia
- Chemistry Department, Division of Natural and Exact Sciences, University of Guanajuato, L. de Retana 5, 36000 Guanajuato, Mexico
| | - Eunice Yanez Barrientos
- Chemistry Department, Division of Natural and Exact Sciences, University of Guanajuato, L. de Retana 5, 36000 Guanajuato, Mexico
| | - Kazimierz Wrobel
- Chemistry Department, Division of Natural and Exact Sciences, University of Guanajuato, L. de Retana 5, 36000 Guanajuato, Mexico.
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10
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Wu LE, Levina A, Harris HH, Cai Z, Lai B, Vogt S, James DE, Lay PA. Carcinogenic Chromium(VI) Compounds Formed by Intracellular Oxidation of Chromium(III) Dietary Supplements by Adipocytes. Angew Chem Int Ed Engl 2015; 55:1742-5. [PMID: 26696553 DOI: 10.1002/anie.201509065] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2015] [Indexed: 12/31/2022]
Abstract
Chromium(III) nutritional supplements are widely consumed for their purported antidiabetic activities. X-ray fluorescence microscopy (XFM) and X-ray absorption near-edge structure (XANES) studies have now shown that non-toxic doses of [Cr3 O(OCOEt)6 (OH2 )3 ](+) (A), a prospective antidiabetic drug that undergoes similar H2 O2 induced oxidation reactions in the blood as other Cr supplements, was also oxidized to carcinogenic Cr(VI) and Cr(V) in living cells. Single adipocytes treated with A had approximately 1 μm large Cr hotspots containing Cr(III) , Cr(V) , and Cr(VI) (primarily Cr(VI) thiolates) species. These results strongly support the hypothesis that the antidiabetic activity of Cr(III) and the carcinogenicity of Cr(VI) compounds arise from similar mechanisms involving highly reactive Cr(VI) and Cr(V) intermediates, and highlight concerns over the safety of Cr(III) nutritional supplements.
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Affiliation(s)
- Lindsay E Wu
- School of Chemistry, The University of Sydney, NSW, 2006, Australia.,Garvan Institute of Medical Research, 384 Victoria St, Darlinghurst, NSW, 2010, Australia.,School of Medical Sciences, UNSW Australia, NSW, 2052, Australia
| | - Aviva Levina
- School of Chemistry, The University of Sydney, NSW, 2006, Australia
| | - Hugh H Harris
- School of Chemistry, The University of Sydney, NSW, 2006, Australia.,School of Chemistry and Physics, The University of Adelaide, SA, 5005, Australia
| | - Zhonghou Cai
- Advanced Photon Source, X-ray Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Barry Lai
- Advanced Photon Source, X-ray Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Stefan Vogt
- Advanced Photon Source, X-ray Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - David E James
- Garvan Institute of Medical Research, 384 Victoria St, Darlinghurst, NSW, 2010, Australia.,Charles Perkins Centre, The University of Sydney, NSW, 2006, Australia
| | - Peter A Lay
- School of Chemistry, The University of Sydney, NSW, 2006, Australia.
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11
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Wu LE, Levina A, Harris HH, Cai Z, Lai B, Vogt S, James DE, Lay PA. Carcinogenic Chromium(VI) Compounds Formed by Intracellular Oxidation of Chromium(III) Dietary Supplements by Adipocytes. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201509065] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Lindsay E. Wu
- School of Chemistry; The University of Sydney; NSW 2006 Australia
- Garvan Institute of Medical Research; 384 Victoria St Darlinghurst NSW 2010 Australia
- School of Medical Sciences; UNSW Australia; NSW 2052 Australia
| | - Aviva Levina
- School of Chemistry; The University of Sydney; NSW 2006 Australia
| | - Hugh H. Harris
- School of Chemistry; The University of Sydney; NSW 2006 Australia
- School of Chemistry and Physics; The University of Adelaide; SA 5005 Australia
| | - Zhonghou Cai
- Advanced Photon Source; X-ray Science Division; Argonne National Laboratory; Argonne IL 60439 USA
| | - Barry Lai
- Advanced Photon Source; X-ray Science Division; Argonne National Laboratory; Argonne IL 60439 USA
| | - Stefan Vogt
- Advanced Photon Source; X-ray Science Division; Argonne National Laboratory; Argonne IL 60439 USA
| | - David E. James
- Garvan Institute of Medical Research; 384 Victoria St Darlinghurst NSW 2010 Australia
- Charles Perkins Centre; The University of Sydney; NSW 2006 Australia
| | - Peter A. Lay
- School of Chemistry; The University of Sydney; NSW 2006 Australia
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12
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Pham THN, Aitken JB, Levina A, Lay PA. Solid-State Structural Studies of Chromium(III) Nicotinato Nutritional Supplements. Inorg Chem 2014; 53:10685-94. [DOI: 10.1021/ic501818w] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- T. H. Nguyen Pham
- School
of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Jade B. Aitken
- School
of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
- Australian Synchrotron, Clayton, Victoria 3168, Australia
- Institute of Materials Structure Science, KEK, Tsukuba, Ibaraki 305-0801, Japan
| | - Aviva Levina
- School
of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Peter A. Lay
- School
of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
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13
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Bartholomäus R, Irwin JA, Shi L, Smith SM, Levina A, Lay PA. Isolation, Characterization, and Nuclease Activity of Biologically Relevant Chromium(V) Complexes with Monosaccharides and Model Diols. Likely Intermediates in Chromium-Induced Cancers. Inorg Chem 2013; 52:4282-92. [DOI: 10.1021/ic3022408] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ruben Bartholomäus
- Fachbereich Chemie, Philipps-Universität Marburg,
Hans-Meerwein-Strasse, D-35032 Marburg, Germany
- School of Chemistry, The University of Sydney, New South
Wales 2006, Australia
| | - Jennifer A. Irwin
- School of Chemistry, The University of Sydney, New South
Wales 2006, Australia
| | - Liwei Shi
- School of Chemistry, The University of Sydney, New South
Wales 2006, Australia
| | - Siwaporn Meejoo Smith
- School of Chemistry, The University of Sydney, New South
Wales 2006, Australia
- Department of Chemistry, Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Aviva Levina
- School of Chemistry, The University of Sydney, New South
Wales 2006, Australia
| | - Peter A. Lay
- School of Chemistry, The University of Sydney, New South
Wales 2006, Australia
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14
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Bartholomäus R, Harms K, Levina A, Lay PA. Synthesis and Characterization of a Chromium(V) cis-1,2-Cyclohexanediolato Complex: A Model of Reactive Intermediates in Chromium-Induced Cancers. Inorg Chem 2012; 51:11238-40. [DOI: 10.1021/ic301900q] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Ruben Bartholomäus
- Fachbereich Chemie, Philipps-Universität Marburg,
Hans-Meerwein Strasse, D-35032 Marburg, Germany
- School of Chemistry, The University of Sydney, Sydney NSW
2006, Australia
| | - Klaus Harms
- Fachbereich Chemie, Philipps-Universität Marburg,
Hans-Meerwein Strasse, D-35032 Marburg, Germany
| | - Aviva Levina
- School of Chemistry, The University of Sydney, Sydney NSW
2006, Australia
| | - Peter A. Lay
- School of Chemistry, The University of Sydney, Sydney NSW
2006, Australia
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15
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Levina A, Zhang L, Lay PA. Formation and reactivity of chromium(V)-thiolato complexes: a model for the intracellular reactions of carcinogenic chromium(VI) with biological thiols. J Am Chem Soc 2010; 132:8720-31. [PMID: 20527748 DOI: 10.1021/ja101675w] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The nature of the long-lived EPR-active Cr(V) species observed in cells and biological fluids exposed to carcinogenic Cr(VI) has been definitively assigned from detailed kinetic and spectroscopic analyses of a model reaction of Cr(VI) with p-bromobenzenethiol (RSH) in the presence or absence of cyclic 1,2-diols (LH(2)) in aprotic or mixed solvents. The first definitive structures for Cr(V) complexes with a monodentate thiolato ligand, [Cr(V)O(SR)(4)](-) (g(iso) = 1.9960, A(iso) = 14.7 x 10(-4) cm(-1)), [Cr(V)OL(SR)(2)](-) (g(iso) = 1.9854, A(iso) = (15.8-16.2) x 10(-4) cm(-1)) and [Cr(V)(O)(2)(SR)(2)](-) (g(iso) = 1.9828, A(iso) = 6.8 x 10(-4) cm(-1)) were assigned by EPR spectroscopy and electrospray mass spectrometry. The unusually low A(iso) ((53)Cr) value for the latter species is consistent with its rare four-coordinate, bis-oxido structure. The [Cr(V)OL(SR)(2)](-) species are responsible for the transient g(iso) approximately 1.986 EPR signals observed in living cells and animals treated with Cr(VI) (where RSH and LH(2) are biological thiols and 1,2-diols, respectively). For the first time, concentrations of Cr(V) intermediates formed during the reduction of Cr(VI) were determined by quantitative EPR spectroscopy, and a detailed reaction mechanism was proposed on the basis of stochastic simulations of the kinetic curves for Cr(V) species. A key feature of the proposed mechanism is the regeneration of Cr(V) species in the presence of Cr(VI) through the formation of organic free radicals, followed by the rapid reactions of the formed radicals with Cr(VI). The concentration of Cr(V) grows rapidly at the beginning of the reaction, reaches a steady-state level, and then drops sharply once Cr(VI) is spent. Similar mechanisms are likely to operate during the reduction of Cr(VI) in biological environment rich in reactive C-H bonds, including the oxidative DNA damage by Cr(V) intermediates.
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Affiliation(s)
- Aviva Levina
- School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
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16
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Synchrotron Infrared Spectromicroscopy for Studying Chemistry of Microbial Activity in Geologic Materials. SYNCHROTRON-BASED TECHNIQUES IN SOILS AND SEDIMENTS 2010. [DOI: 10.1016/s0166-2481(10)34004-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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17
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Nguyen A, Mulyani I, Levina A, Lay PA. Reactivity of Chromium(III) Nutritional Supplements in Biological Media: An X-Ray Absorption Spectroscopic Study. Inorg Chem 2008; 47:4299-309. [DOI: 10.1021/ic7024389] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Annie Nguyen
- School of Chemistry, The University of Sydney, NSW, 2006, Australia
| | - Irma Mulyani
- School of Chemistry, The University of Sydney, NSW, 2006, Australia
| | - Aviva Levina
- School of Chemistry, The University of Sydney, NSW, 2006, Australia
| | - Peter A. Lay
- School of Chemistry, The University of Sydney, NSW, 2006, Australia
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18
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Evidence for the involvement of CrII and free radicals as intermediates in the reduction of by saccharides, alcohols and hydroxyacids. INORG CHEM COMMUN 2006. [DOI: 10.1016/j.inoche.2006.02.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Kapre R, Ray K, Sylvestre I, Weyhermüller T, DeBeer George S, Neese F, Wieghardt K. Molecular and Electronic Structures of Oxo-bis(benzene-1,2-dithiolato)chromate(V) Monoanions. A Combined Experimental and Density Functional Study. Inorg Chem 2006; 45:3499-509. [PMID: 16634580 DOI: 10.1021/ic051844s] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Two oxo-bis(benzene-1,2-dithiolato)chromate(V) complexes, namely, [CrO(L(Bu))2]1- and [CrO(L(Me))2]1-, have been synthesized and studied by UV-vis, EPR, magnetic circular dichroism (MCD), and X-ray absorption spectroscopy and by X-ray crystallography; their electro- and magnetochemistries are reported. H2L(Bu) represents the pro-ligand 3,5-di-tert-butylbenzene-1,2-dithiol, and H2L(Me) is the corresponding 4-methyl-benzene-1,2-dithiol. A structural feature of interest for both the complexes is the folding of the dithiolate ligands about the S-S vector providing Cs symmetry to the complexes. Geometry optimizations using all-electron density functional theory with scalar relativistic corrections at the second-order Douglas-Kroll-Hess (DKH2) and zeroth-order regular approximation (ZORA) levels result in excellent agreement with the experimentally determined structures and electronic and S K-edge X-ray absorption spectra. From DFT calculations, the Cs instead of C2v symmetry for the complexes is attributed to the strong S(3p) --> Cr(3d(x2-y2)) pi-donation in Cs geometry providing additional stability to the complexes.
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Affiliation(s)
- Ruta Kapre
- Max-Planck Institut für Bioanorganische Chemie, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
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20
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Ruggles JL, Foran GJ, Tanida H, Nagatani H, Jimura Y, Watanabe I, Gentle IR. Interfacial behavior of tetrapyridylporphyrin monolayer arrays. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:681-6. [PMID: 16401117 DOI: 10.1021/la051474k] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The behavior of monolayer films of free base 5,10,15,20-tetrapyridylporphinato (TPyP) and 5,10,15,20-tetrapyridylporphinato zinc(II) (ZnTPyP) on pure water, 0.1 M CdCl2, and 0.1 M CuCl2 subphases was investigated by surface pressure-area isotherms, specular X-ray reflectometry, and polarized total reflection X-ray absorption spectroscopy (PTRXAS). Surface pressure-area isotherms showed significant differences in the area per molecule on pure water compared to that on salt subphases, with a marked increase in the area observed on the salt solutions. This behavior was noted for both forms of the porphyrin and both salts investigated. Modeling of specular X-ray reflectometry data indicated that thinner and more electron dense layers on salt subphases best fit the observed profiles. These data suggest that the porphyrin macrocycle is oriented parallel to the interface on salt subphases and takes on a tilted conformation on pure water. In the case of ZnTPyP, PTRXAS was used to determine the orientation of the porphyrin moiety relative to the surface and to probe the coordination of the central Zn ion. In agreement with the pressure-area isotherms and reflectometry, the PTRXAS data indicate a change in orientation on the salt subphases.
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Affiliation(s)
- Jeremy L Ruggles
- School of Molecular and Microbial Sciences, The University of Queensland, Brisbane, Australia 4072
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21
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Levina A, Harris HH, Lay PA. Binding of chromium(VI) to histones: implications for chromium(VI)-induced genotoxicity. J Biol Inorg Chem 2005; 11:225-34. [PMID: 16362419 DOI: 10.1007/s00775-005-0068-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2005] [Accepted: 11/23/2005] [Indexed: 10/25/2022]
Abstract
The first evidence has been obtained for Cr(VI) (chromate) binding to isolated calf thymus (CT) histones under physiological conditions (pH 7.4, Cl(-) concentration 152 mM, 310 K). No significant Cr(VI) binding under the same conditions was observed for other extracellular and intracellular proteins, including albumin, apo-transferrin and G-actin, as well as for CT DNA. The mode of Cr(VI) binding to histones was studied by vibrational, electronic and X-ray absorption (X-ray absorption near-edge structure and X-ray absorption fine structure) spectroscopies and molecular mechanics calculations. A proposed binding mechanism includes electrostatic interactions of CrO(4) (2-) with protonated Lys and Arg residues of histones, as well as the formation of hydrogen bonds with the protein backbone. Similarly, Cr(VI) can bind to nuclear localization signals (typically, Lys- and Arg-rich fragments) of other nuclear proteins. Selective binding of Cr(VI) to newly synthesized nuclear proteins (including histones) in the cytoplasm is likely to be responsible for the active transport of Cr(VI) into the nuclei of living cells.
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Affiliation(s)
- Aviva Levina
- Centre for Heavy Metals Research, and Centre for Structural Biology and Structural Chemistry, School of Chemistry, The University of Sydney, 2006 Sydney, NSW, Australia
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Harris HH, Levina A, Dillon CT, Mulyani I, Lai B, Cai Z, Lay PA. Time-dependent uptake, distribution and biotransformation of chromium(VI) in individual and bulk human lung cells: application of synchrotron radiation techniques. J Biol Inorg Chem 2005; 10:105-18. [PMID: 15714299 DOI: 10.1007/s00775-004-0617-1] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2004] [Accepted: 11/22/2004] [Indexed: 10/25/2022]
Abstract
Chromium(VI) is a human carcinogen, primarily affecting the respiratory tract probably via active transport into cells, followed by the reduction to Cr(III) with the formation of DNA-damaging intermediates. Distribution of Cr and endogenous elements within A549 human lung adenocarcinoma epithelial cells, following treatment with Cr(VI) (100 microM, 20 min or 4 h) were studied by synchrotron-radiation-induced X-ray emission (SRIXE) of single freeze-dried cells. After the 20-min treatment, Cr was confined to a small area of the cytoplasm and strongly co-localized with S, Cl, K, and Ca. After the 4-h treatment, Cr was distributed throughout the cell, with higher concentrations in the nucleus and the cytoplasmic membrane. This time-dependence corresponded to approximately 100% or 0% clonogenic survival of the cells following the 20-min or 4-h treatments, respectively, and could potentially be explained by a new cellular protective mechanism. Such processes may also be important in reducing the potential hazards of Cr(III) dietary supplements, for which there is emerging evidence that they exert their anti-diabetic effects via biological oxidation to Cr(VI). The predominance of Cr(III) was confirmed by micro-XANES spectroscopy of intracellular Cr hotspots. X-ray absorption spectroscopy (XANES and EXAFS, using freeze-dried cells after the 0-4-h treatments) was used to gain insight into the chemical structures of Cr(III) complexes formed during the intracellular reduction of Cr(VI). The polynuclear nature of such complexes (probably with a combination of carboxylato and hydroxo bridging groups and O-donor atoms of small peptides or proteins) was established by XAFS data analyses.
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Affiliation(s)
- Hugh H Harris
- Centre for Heavy Metals Research, and Centre for Structural Biology and Structural Chemistry, School of Chemistry, University of Sydney, NSW, Australia
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Levina A, Lay PA. Mechanistic studies of relevance to the biological activities of chromium. Coord Chem Rev 2005. [DOI: 10.1016/j.ccr.2004.02.017] [Citation(s) in RCA: 156] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Levina A, Armstrong RS, Lay PA. Three-dimensional structure determination using multiple-scattering analysis of XAFS: applications to metalloproteins and coordination chemistry. Coord Chem Rev 2005. [DOI: 10.1016/j.ccr.2004.10.008] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Kinetics and mechanism of a trans-tetraazamacrocyclic chromium(III) complex oxidation by hexacyanoferrate(III) in strongly alkaline media. TRANSIT METAL CHEM 2004. [DOI: 10.1007/s11243-004-1568-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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