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Orzeł Ł, Drzewiecka-Matuszek A, Rutkowska-Zbik D, Krasowska A, Fiedor L, van Eldik R, Stochel G. Copper(II)-Assisted Degradation of Pheophytin a by Reactive Oxygen Species. Int J Mol Sci 2024; 25:1831. [PMID: 38339109 PMCID: PMC10855625 DOI: 10.3390/ijms25031831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 01/29/2024] [Accepted: 02/01/2024] [Indexed: 02/12/2024] Open
Abstract
The central ion Mg2+ is responsible for the differences between chlorophyll a and its free base in their reactivity toward metal ions and thus their resistance to oxidation. We present here the results of spectroscopic (electronic absorption and emission, circular dichroism, and electron paramagnetic resonance), spectroelectrochemical, and computational (based on density functional theory) investigations into the mechanism of pheophytin, a degradation that occurs in the presence of Cu ions and O2. The processes leading to the formation of the linear form of tetrapyrrole are very complex and involve the weakening of the methine bridge due to an electron withdrawal by Cu(II) and the activation of O2, which provides protection to the free ends of the opening macrocycle. These mechanistic insights are related to the naturally occurring damage to the photosynthetic apparatus of plants growing on metal-contaminated soils.
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Affiliation(s)
- Łukasz Orzeł
- Faculty of Chemistry, Jagiellonian University, 30-387 Cracow, Poland; (A.K.); (R.v.E.); (G.S.)
| | - Agnieszka Drzewiecka-Matuszek
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, 30-239 Cracow, Poland; (A.D.-M.); (D.R.-Z.)
| | - Dorota Rutkowska-Zbik
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, 30-239 Cracow, Poland; (A.D.-M.); (D.R.-Z.)
| | - Aneta Krasowska
- Faculty of Chemistry, Jagiellonian University, 30-387 Cracow, Poland; (A.K.); (R.v.E.); (G.S.)
| | - Leszek Fiedor
- Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 30-387 Cracow, Poland;
| | - Rudi van Eldik
- Faculty of Chemistry, Jagiellonian University, 30-387 Cracow, Poland; (A.K.); (R.v.E.); (G.S.)
- Department of Inorganic and Coordination Chemistry, Nicolaus Copernicus University, 87-100 Torun, Poland
- Department of Chemistry add Pharmacy, University of Erlangen-Nuremberg, 91054 Erlangen, Germany
| | - Grażyna Stochel
- Faculty of Chemistry, Jagiellonian University, 30-387 Cracow, Poland; (A.K.); (R.v.E.); (G.S.)
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2
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Tang H, Xu S, Li M, Wu L, Duan C, Luo H, Zhou B, Rao M, Qiu Y, Chen G, Yan K. Photodehydration of Ethanol Mediated by CuCl 2-Ethanol Complex. J Phys Chem Lett 2023; 14:2750-2757. [PMID: 36897319 DOI: 10.1021/acs.jpclett.2c03836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Biomass ethanol is regarded as a renewable resource but it is not economically viable to transform it to high-value industrial chemicals at present. Herein, a simple, green, and low-cost CuCl2-ethanol complex is reported for ethanol dehydration to produce ethylene and acetal simultaneously with high selectivity under sunlight irradiation. Under N2 atmosphere, the generation rates of ethylene and acetal were 165 and 3672 μmol g-1 h-1, accounting for 100% in gas products and 97% in liquid products, respectively. An outstanding apparent quantum yield of 13.2% (365 nm) and the maximum conversion rate of 32% were achieved. The dehydration reactions start from the photoexcited CuCl2-ethanol complex, and then go through the energy transfer (EnT) and ligand to metal charge transfer (LMCT) mechanisms to produce ethylene and acetal, respectively. The formation energies of the CuCl2-ethanol complex and the key intermediate radicals (e.g., ·OH, CH3CH2·, and CH3CH2O·) were validated to clarify the mechanisms. Different from previous CuCl2-based oxidation and addition reactions, this work is anticipated to supply new insights into the dehydration reaction of ethanol to produce useful chemical feedstocks.
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Affiliation(s)
- Huiling Tang
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510000, China
| | - Shuang Xu
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510000, China
| | - Mingjie Li
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510000, China
| | - Liqin Wu
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510000, China
| | - Chenghao Duan
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510000, China
| | - Huiming Luo
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510000, China
| | - Biao Zhou
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510000, China
| | - Mumin Rao
- Guangdong Energy Group Science and Technology Research Institute of Co., Ltd., Guangzhou, 510630, China
| | - Yongcai Qiu
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510000, China
| | - Guangxu Chen
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510000, China
| | - Keyou Yan
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510000, China
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3
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Peroxidative Oxidation of Cyclohexane Using 3d Metal Complexes with Hydrazone-Derived Ligands as Catalysts: Exploring (Un)Conventional Conditions. INORGANICS 2023. [DOI: 10.3390/inorganics11020062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Two tetranuclear and two mononuclear Cu(II) complexes with arylhydrazones of malononitrile derived ligands (compounds 1–2 and 3–4, respectively), one trinuclear Co(II/III) complex with an arylhydrazone of acetoacetanilide (5) and one tetranuclear Zn(II) complex of 3-(2-carboxyphenyl-hydrazone)pentane-2,4-dione (6) were screened as potential catalysts in the peroxidative oxidation of cyclohexane by aqueous H2O2 in acetonitrile. The best results were attained in the presence of pyrazine-2-carboxylic acid (PCA) with 1 (26% yield, TON = 52.0) and with 2 (24%, TON = 48.0) after 4 h at 40 °C. In the presence of complexes 5 and 6, no oxygenated products were detected in the studied conditions. The employment of non-conventional conditions like supercritical carbon dioxide (scCO2) as reaction medium or microwave (MW) irradiation was assessed for complexes 1 and 2. After 6 h in acetonitrile–scCO2, at 50 °C and with HNO3 as promoter, only 17% yield was achieved using 1 as catalyst, and 21% using 2. Total yields of oxygenates up to 14 (with 1) and 13% (2) and TOFs of 56.0 and 52.0 h−1, respectively, were obtained working under MW irradiation at 70 °C and for the much shorter time of 0.5 h.
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4
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Li S, Tian D, Zhao X, Yin Y, Lee R, Jiang Z. Visible light-driven copper( ii) catalyzed aerobic oxidative cleavage of carbon–carbon bonds: a combined experimental and theoretical study. Org Chem Front 2022. [DOI: 10.1039/d2qo01264b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
By switching on visible blue light, aerobic oxidation of various substrates, such as α-substituted, β-substituted and α-halo styrenes, was first realized with a copper(ii) catalyst.
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Affiliation(s)
- Sanliang Li
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province, Henan University, Kaifeng, Henan, 475004, P. R. China
| | - Dong Tian
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province, Henan University, Kaifeng, Henan, 475004, P. R. China
| | - Xiaowei Zhao
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province, Henan University, Kaifeng, Henan, 475004, P. R. China
| | - Yanli Yin
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, 453007, P. R. China
| | - Richmond Lee
- School of Chemistry and Molecular Bioscience and Molecular Horizons, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia
| | - Zhiyong Jiang
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province, Henan University, Kaifeng, Henan, 475004, P. R. China
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, 453007, P. R. China
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5
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Chebout O, Trifa C, Bouacida S, Boudraa M, Imane H, Merzougui M, Mazouz W, Ouari K, Boudaren C, Merazig H. Two new copper (II) complexes with sulfanilamide as ligand: Synthesis, structural, thermal analysis, electrochemical studies and antibacterial activity. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131446] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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6
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Camats M, Favier I, Mallet-Ladeira S, Pla D, Gómez M. Understanding Cu(II)-based systems for C(sp 3)-H bond functionalization: insights into the synthesis of aza-heterocycles. Org Biomol Chem 2021; 20:219-227. [PMID: 34878447 DOI: 10.1039/d1ob02118d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein we report the synthesis of imidazo[1,5-a]pyridine heterocycles via a Cu(II)-mediated functionalization of α'-C(sp3)-H bonds of pyridinylaldimines and subsequent cyclization. This strategy exploits the inherent directing ability of heteroleptic aldimine and pyridine groups in the substrate yielding the C-H functionalization of α'-methylene groups in a regioselective fashion over distant methyl or methylene groups in β or γ positions. The observed correlation between the nature of the anionic ligands (halide vs. carboxylate) bonded to copper and the chemoselectivity of the C(sp3)-H activation process points to a concerted metalation-deprotonation pathway prior to cyclization to furnish the corresponding imidazo[1,5-a]pyridine derivative. This copper-mediated C(sp3)-H bond functionalization reaction works for a variety of substrates incorporating linear alkyl chains (from 3 to 12 carbon atoms), and good functional group tolerance (aryl, ether and ester groups). Cu-Catalyzed C(sp2)-H cyanation on the imidazole ring can then take place selectively under oxidative conditions.
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Affiliation(s)
- Marc Camats
- Laboratoire Hétérochimie Fondamentale et Appliquée, CNRS UMR 5069, Université Toulouse 3 - Paul Sabatier, 118 route de Narbonne, 31062 Toulouse Cedex 09, France.
| | - Isabelle Favier
- Laboratoire Hétérochimie Fondamentale et Appliquée, CNRS UMR 5069, Université Toulouse 3 - Paul Sabatier, 118 route de Narbonne, 31062 Toulouse Cedex 09, France.
| | - Sonia Mallet-Ladeira
- Institut de Chimie de Toulouse, CNRS UAR 2599, 118 Route de Narbonne, Toulouse 31062 Cedex 09, France
| | - Daniel Pla
- Laboratoire Hétérochimie Fondamentale et Appliquée, CNRS UMR 5069, Université Toulouse 3 - Paul Sabatier, 118 route de Narbonne, 31062 Toulouse Cedex 09, France.
| | - Montserrat Gómez
- Laboratoire Hétérochimie Fondamentale et Appliquée, CNRS UMR 5069, Université Toulouse 3 - Paul Sabatier, 118 route de Narbonne, 31062 Toulouse Cedex 09, France.
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7
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Orzeł Ł, Rutkowska-Zbik D, van Eldik R, Fiedor L, Stochel G. Chlorophyll a π-Cation Radical as Redox Mediator in Superoxide Dismutase (SOD) Mimetics. Chemphyschem 2021; 22:344-348. [PMID: 33351996 DOI: 10.1002/cphc.202000777] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 12/20/2020] [Indexed: 11/11/2022]
Abstract
The extensive speciation of copper(II) chloride in organic solvents varies with concentration, temperature, pressure and oxygen content, providing the ability to switch between different chlorophyll transmetalation pathways. We found that one of them is exceptionally suitable for the formation and stabilisation of the chlorophyll π-cation radical. This is due to unique redox cycling, which is coupled to the generation and transformation of various reactive oxygen species. In the presence of a proton donor, our system shows behavior which resembles that of superoxide dismutase (SOD). Regardless of light, chlorophyll acts as an electron transfer mediator.
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Affiliation(s)
- Łukasz Orzeł
- Faculty of Chemistry, Jagiellonian University, Kraków, Poland
| | - Dorota Rutkowska-Zbik
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Kraków, Poland
| | - Rudi van Eldik
- Faculty of Chemistry, Jagiellonian University, Kraków, Poland.,Department of Chemistry add Pharmacy, University of Erlangen-Nuremberg, Erlangen, Germany.,Faculty of Chemistry, Nicolaus Copernicus University, Toruń, Poland
| | - Leszek Fiedor
- Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Grażyna Stochel
- Faculty of Chemistry, Jagiellonian University, Kraków, Poland
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8
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Ondrejovič G, Moncol J, Koman M. The crystal structure of tetrameric copper(II) complexes, Hirshfeld surface analysis, and vector analyses of Cu4OCl6L4 complexes with N-donor ligands. CHEMICAL PAPERS 2020. [DOI: 10.1007/s11696-020-01257-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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Dehnhardt N, Berthold C, Dollberg K, Tambornino F, Heine J. Synthesis and crystal structures of two layered Cu(I) and Ag(I) iodidometalates. Z KRIST-CRYST MATER 2020. [DOI: 10.1515/zkri-2020-0021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Cu(I) and Ag(I) iodidometalates have been investigated for both their rich structural chemistry, as well as for useful properties like luminescence. Here, we present the synthesis and crystal structure of (BzA)[MI2] · 0.5 H2O (BzA = benzylammonium; M=Cu (1), Ag (2)). The two compounds are isostructural and show a previously unknown layered anion motif that can be described as a 44 net constructed via corner-sharing of M2I6 subunits, built from two edge-sharing MI4 tetrahedra.
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Affiliation(s)
- Natalie Dehnhardt
- Department of Chemistry and Material Sciences Center , Philipps-Universität Marburg, Hans-Meerwein-Straße , 35043 Marburg , Germany
| | - Chantsalmaa Berthold
- Department of Chemistry and Material Sciences Center , Philipps-Universität Marburg, Hans-Meerwein-Straße , 35043 Marburg , Germany
| | - Kevin Dollberg
- Department of Chemistry and Material Sciences Center , Philipps-Universität Marburg, Hans-Meerwein-Straße , 35043 Marburg , Germany
| | - Frank Tambornino
- Department of Chemistry and Material Sciences Center , Philipps-Universität Marburg, Hans-Meerwein-Straße , 35043 Marburg , Germany
| | - Johanna Heine
- Department of Chemistry and Material Sciences Center , Philipps-Universität Marburg, Hans-Meerwein-Straße , 35043 Marburg , Germany
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10
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Nesterova OV, Bondarenko OE, Pombeiro AJL, Nesterov DS. Phenoxazinone synthase-like catalytic activity of novel mono- and tetranuclear copper(ii) complexes with 2-benzylaminoethanol. Dalton Trans 2020; 49:4710-4724. [PMID: 32207490 DOI: 10.1039/d0dt00222d] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Three novel coordination compounds, [Cu(ca)2(Hbae)2] (1), [Cu(va)2(Hbae)2] (2) and [Cu4(va)4(bae)4]·H2O (3), have been prepared by self-assembly reactions of copper(ii) chloride (1 and 2) or tetrafluoroborate (3) and CH3OH (1 and 3) or CH3CN (2) solution of 2-benzylaminoethanol (Hbae) and cinnamic (Hca, 1) or valeric (Hva, 2 and 3) acid. Crystallographic analysis revealed that both 1 and 2 have mononuclear crystal structures, wherein the complex molecules are H-bonded forming extended supramolecular chains. The tetranuclear structure of 3 is based on the {Cu4(μ3-O)4} core, wherein the metal atoms are bound together by μ3 oxygen bridges from 2-benzylaminoethanol forming an overall cubane-like configuration. The strong hydrogen bonding in 1-3 leads to the joining of the neighbouring molecules into 1D chains. Concentration-dependent ESI-MS studies disclosed the equilibria between di-, tri- and tetranuclear species in solutions of 1-3. All three compounds act as catalysts for the aerobic oxidation of o-aminophenol to the phenoxazinone chromophore (phenoxazinone synthase-like activity), with the maximum reaction rates of 4.0 × 10-7, 2.5 × 10-7 and 2.1 × 10-7 M s-1 for 1, 2 and 3, respectively, supported by the quantitative yield of the product after 24 h. The dependence of the reaction rates on catalyst concentrations is evidence of reaction orders higher than one relative to the catalyst. Kinetic and ESI-MS data allowed us to assume that the tetranuclear species, originating from 1, 2 and 3 in solution, possess considerably higher activity than the species of lower nuclearity. Mechanistic and isotopic 18O-labelling experiments suggested that o-aminophenol coordinates to CuII species with the formation of reactive intermediates, while the oxygen from 18O2 is not incorporated into the phenoxazinone chromophore.
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Affiliation(s)
- Oksana V Nesterova
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - Olena E Bondarenko
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - Armando J L Pombeiro
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - Dmytro S Nesterov
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal. and Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya st., Moscow 117198, Russia
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11
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Dutta T, Mirdya S, Giri P, Chattopadhyay S. Synthesis and characterization of a double oximato bridged dimeric copper(II) complex and its use in oxidative dimerisation of o-aminophenol. Polyhedron 2020. [DOI: 10.1016/j.poly.2019.114164] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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12
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Gawlig C, Schindler S, Becker S. One‐Pot Conversion of Cyclohexane to Adipic Acid Using a µ
4
‐Oxido‐Copper Cluster as Catalyst Together with Hydrogen Peroxide. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201901052] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Christopher Gawlig
- Institut für Anorganische und Analytische Chemie Justus‐Liebig‐Universität Gießen Heinrich‐Buff‐Ring 17 35392 Gießen Germany
| | - Siegfried Schindler
- Institut für Anorganische und Analytische Chemie Justus‐Liebig‐Universität Gießen Heinrich‐Buff‐Ring 17 35392 Gießen Germany
| | - Sabine Becker
- Fachbereich Chemie Technische Universität Kaiserslautern Erwin‐Schrödinger‐Straße 54/684 67663 Kaiserslautern Germany
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13
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Chellali JE, Keely C, Bell G, Dimanno KL, Tran T, Landee CP, Dickie DA, Rademeyer M, Turnbull MM, Xiao F. Cobalt and zinc halide complexes of 4-chloro and 4-methylaniline: Syntheses, structures and magnetic behavior. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.04.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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A Comparative Study of the Catalytic Behaviour of Alkoxy-1,3,5-Triazapentadiene Copper(II) Complexes in Cyclohexane Oxidation. INORGANICS 2019. [DOI: 10.3390/inorganics7070082] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The mononuclear copper complexes [Cu{NH=C(OR)NC(OR)=NH}2] with alkoxy-1,3,5-triazapentadiene ligands that have different substituents (R = Me (1), Et (2), nPr (3), iPr (4), CH2CH2OCH3 (5)) were prepared, characterized (including the single crystal X-ray analysis of 3) and studied as catalysts in the mild oxidation of alkanes with H2O2 as an oxidant, pyridine as a promoting agent and cyclohexane as a main model substrate. The complex 4 showed the highest activity with a yield of products up to 18.5% and turnover frequency (TOF) up to 41 h−1. Cyclohexyl hydroperoxide was the main reaction product in all cases. Selectivity parameters in the oxidation of substituted cyclohexanes and adamantane disclosed a dominant free radical reaction mechanism with hydroxyl radicals as C–H-attacking species. The main overoxidation product was 6-hydroxyhexanoic acid, suggesting the presence of a secondary reaction mechanism of a different type. All complexes undergo gradual alteration of their structures in acetonitrile solutions to produce catalytically-active intermediates, as evidenced by UV/Vis spectroscopy and kinetic studies. Complex 4, having tertiary C–H bonds in its iPr substituents, showed the fastest alteration rate, which can be significantly suppressed by using the CD3CN solvent instead of CH3CN one. The observed process was associated to an autocatalytic oxidation of the alkoxy-1,3,5-triazapentadiene ligand. The deuterated complex 4-d32 was prepared and showed higher stability under the same conditions. The complexes 1 and 4 showed different reactivity in the formation of H218O from 18O2 in acetonitrile solutions.
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15
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Li T, Xing Z. Crystal structure of hexa-μ2-chlorido-μ4-oxido-tetrakis(1-vinyl-1H-imidazole-κN)tetracopper(II), C20H24Cu4Cl6N8O. Z KRIST-NEW CRYST ST 2019. [DOI: 10.1515/ncrs-2018-0421] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractC20H24Cu4Cl6N8O, orthorhombic, P212121 (no. 19), a = 12.159(7) Å, b = 14.299(8) Å, c = 19.186(11) Å, V = 3336(3) Å3, Z = 4, Rgt(F) = 0.0382, wRref(F2) = 0.0615, T = 296(2) K.
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Affiliation(s)
- Ting Li
- Zhenjiang Key Laboratory of Functional Chemistry and Institute of Medicine and Chemical Engineering, Zhenjiang College, Zhenjiang Jiangsu 212028, P.R. China
| | - Zheng Xing
- Zhenjiang Key Laboratory of Functional Chemistry and Institute of Medicine and Chemical Engineering, Zhenjiang College, Zhenjiang Jiangsu 212028, P.R. China
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16
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Structure and magnetic characterization of tetranuclear closed/double-open cubane core, and 1D polynuclear copper(II) complexes. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2019.01.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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17
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Bogachev NA, Lyubichev DA, Starova GL, Nikolskii AB, Skripkin MY. Solubility of Copper(II) Chloride in Mixed Organic Oxygen-Containing Solvents. RUSS J GEN CHEM+ 2018. [DOI: 10.1134/s1070363218040011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Lommens P, Tack P, Vander Elst L, Van Driessche I, Vincze L, Sinnaeve D. Spectroscopy as a tool to detect multinuclear Cu(ii)–triethanolamine complexes in aqueous solution. Dalton Trans 2018; 47:3755-3763. [DOI: 10.1039/c7dt04146b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Evans method, Extended X-ray Absorption Fine Structure (EXAFS) and NMR relaxation dispersion (NMRD) spectroscopy were used to prove the existence of multimeric Cu(ii)–triethanolamine species in aqueous solutions.
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Affiliation(s)
- Petra Lommens
- SCRiPTs
- Department of Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - Pieter Tack
- XMI research group
- Department of Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - Luce Vander Elst
- NMR and Molecular Imaging Laboratory
- Department of General
- Organic and Biomedical Chemistry
- Université de Mons
- 7000 Mons
| | | | - Laszlo Vincze
- XMI research group
- Department of Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - Davy Sinnaeve
- NMR and Structure Analysis Unit
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Ghent
- Belgium
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19
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Stumpf TDJ, Steinbach M, Würtele C, Becker J, Becker S, Fröhlich R, Göttlich R, Schindler S. Reactivity of Copper Complexes with Bis(piperidinyl)methane and Bis(quinolinyl)methane Ligands. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700755] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Tim-Daniel J. Stumpf
- Institute for Inorganic and Analytical Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
- Institute for Organic Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Manfred Steinbach
- Institute for Inorganic and Analytical Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
- Institute for Organic Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Christian Würtele
- Institute for Inorganic and Analytical Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Jonathan Becker
- Institute for Inorganic and Analytical Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Sabine Becker
- Institute for Inorganic and Analytical Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Roland Fröhlich
- Institute for Organic Chemistry; WWU Münster; Corrensstraße 40 48149 Münster Germany
| | - Richard Göttlich
- Institute for Organic Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Siegfried Schindler
- Institute for Inorganic and Analytical Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
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Nesterov DS, Alegria EC, Jezierska J. A new member of Cu II 8 family: Synthesis, structure and magnetic properties of an octanuclear copper complex with N -tert -butyldiethanolamine. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2016.09.036] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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21
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Abe T, Tanaka S, Ogawa A, Tamura M, Sato K, Itoh S. Copper-catalyzed Selective Oxygenation of Methyl and Benzyl Substituents in Pyridine with O2. CHEM LETT 2017. [DOI: 10.1246/cl.161074] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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22
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Sagar S, Sengupta S, Mota AJ, Chattopadhyay SK, Espinosa Ferao A, Riviere E, Lewis W, Naskar S. Cubane-like tetranuclear Cu(ii) complexes bearing a Cu4O4 core: crystal structure, magnetic properties, DFT calculations and phenoxazinone synthase like activity. Dalton Trans 2017; 46:1249-1259. [DOI: 10.1039/c6dt03754b] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two tetranuclear copper complexes with a Cu4O4 cubane core exhibiting phenoxazinone synthase like activity are reported.
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Affiliation(s)
- Shipra Sagar
- Department of Chemistry
- Birla Institute of Technology
- Ranchi-835215
- India
| | - Swaraj Sengupta
- Department of Chemistry
- Birla Institute of Technology
- Ranchi-835215
- India
- Department of Chemistry
| | - Antonio J. Mota
- Department of Inorganic Chemistry
- Faculty of Sciences
- University of Granada
- 18002 Granada
- Spain
| | - Shyamal K. Chattopadhyay
- Department of Chemistry
- Indian Institute of Engineering Science and Technology-Shibpur
- Howrah-711103
- India
| | | | - Eric Riviere
- Equipe Chimie Inorganique
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- Université Paris Sud
- 91400 Orsay
- France
| | - William Lewis
- School of Chemistry
- University of Nottingham
- Nottingham NG7 2RD
- UK
| | - Subhendu Naskar
- Department of Chemistry
- Birla Institute of Technology
- Ranchi-835215
- India
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23
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Becker S, Dürr M, Miska A, Becker J, Gawlig C, Behrens U, Ivanović-Burmazović I, Schindler S. Copper Chloride Catalysis: Do μ4-Oxido Copper Clusters Play a Significant Role? Inorg Chem 2016; 55:3759-66. [DOI: 10.1021/acs.inorgchem.5b02576] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sabine Becker
- Institut
für Anorganische und Analytische Chemie, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Maximilian Dürr
- Lehrstuhl
für Bioanorganische Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Andreas Miska
- Institut
für Anorganische und Analytische Chemie, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Jonathan Becker
- Institut
für Anorganische und Analytische Chemie, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Christopher Gawlig
- Institut
für Anorganische und Analytische Chemie, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Ulrich Behrens
- Institut
für Anorganische und Angewandte Chemie, Universität Hamburg, Martin-Luther-King-Platz 6, 20146 Hamburg, Germany
| | - Ivana Ivanović-Burmazović
- Lehrstuhl
für Bioanorganische Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Siegfried Schindler
- Institut
für Anorganische und Analytische Chemie, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
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25
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A versatile ethanolamine-derived trifluoromethyl enaminone ligand for the elaboration of nickel(II) and copper(II)–dysprosium(III) multinuclear complexes with magnetic properties. J Fluor Chem 2015. [DOI: 10.1016/j.jfluchem.2015.06.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Becker S, Behrens U, Schindler S. Investigations Concerning [Cu4OX6L4] Cluster Formation of Copper(II) Chloride with Amine Ligands Related to Benzylamine. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500115] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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27
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Becker S, Behrens U, Schindler S. Synthesis, Structure and Reactivity of the Compound [Cu(C 7H 7NH 2)Cl] 4derived from CuCl and Benzylamine (C 7H 7NH 2). Z Anorg Allg Chem 2015. [DOI: 10.1002/zaac.201400395] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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28
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You X, Wei Z, Wang H, Li D, Liu J, Xu B, Liu X. Synthesis of two copper clusters and their catalysis towards the oxidation of benzene into phenol. RSC Adv 2014. [DOI: 10.1039/c4ra12832j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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29
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Halvagar M, Solntsev PV, Lim H, Hedman B, Hodgson KO, Solomon E, Cramer CJ, Tolman WB. Hydroxo-bridged dicopper(II,III) and -(III,III) complexes: models for putative intermediates in oxidation catalysis. J Am Chem Soc 2014; 136:7269-72. [PMID: 24821432 PMCID: PMC4046753 DOI: 10.1021/ja503629r] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Indexed: 12/21/2022]
Abstract
A macrocyclic ligand (L(4-)) comprising two pyridine(dicarboxamide) donors was used to target reactive copper species relevant to proposed intermediates in catalytic hydrocarbon oxidations by particulate methane monooxygenase and heterogeneous zeolite systems. Treatment of LH4 with base and Cu(OAc)2·H2O yielded (Me4N)2[L2Cu4(μ4-O)] (1) or (Me4N)[LCu2(μ-OH)] (2), depending on conditions. Complex 2 was found to undergo two reversible 1-electron oxidations via cyclic voltammetry and low-temperature chemical reactions. On the basis of spectroscopy and theory, the oxidation products were identified as novel hydroxo-bridged mixed-valent Cu(II)Cu(III) and symmetric Cu(III)2 species, respectively, that provide the first precedence for such moieties as oxidation catalysis intermediates.
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Affiliation(s)
- Mohammad
Reza Halvagar
- Department
of Chemistry, Center for Metals in Biocatalysis, Chemical Theory Center,
and Minnesota Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Pavlo V. Solntsev
- Department
of Chemistry, Center for Metals in Biocatalysis, Chemical Theory Center,
and Minnesota Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Hyeongtaek Lim
- Department
of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Britt Hedman
- Stanford
Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Keith O. Hodgson
- Department
of Chemistry, Stanford University, Stanford, California 94305, United States
- Stanford
Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Edward
I. Solomon
- Department
of Chemistry, Stanford University, Stanford, California 94305, United States
- Stanford
Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Christopher J. Cramer
- Department
of Chemistry, Center for Metals in Biocatalysis, Chemical Theory Center,
and Minnesota Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - William B. Tolman
- Department
of Chemistry, Center for Metals in Biocatalysis, Chemical Theory Center,
and Minnesota Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
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30
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Jin Y, Yu CH, Zhang W. Structural diversity of a series of chlorocadmate(II) and chlorocuprate(II) complexes based on benzylamine and its N-methylated derivatives. J COORD CHEM 2014. [DOI: 10.1080/00958972.2014.909589] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Yu Jin
- Ordered Matter Science Research Center, Southeast University, Nanjing, China
| | - Chun-Hua Yu
- Ordered Matter Science Research Center, Southeast University, Nanjing, China
| | - Wen Zhang
- Ordered Matter Science Research Center, Southeast University, Nanjing, China
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31
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Gungor E, Kara H, Colacio E, Mota AJ. Two Tetranuclear Copper(II) Complexes with Open Cubane-Like Cu4O4Core Framework and Ferromagnetic Exchange Interactions between Copper(II) Ions: Structure, Magnetic Properties, and Density Functional Study. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201301515] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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32
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Hazra S, Mukherjee S, Guedes da Silva MFC, Pombeiro AJL. A cyclic tetranuclear cuboid type copper(ii) complex doubly supported by cyclohexane-1,4-dicarboxylate: molecular and supramolecular structure and cyclohexane oxidation activity. RSC Adv 2014. [DOI: 10.1039/c4ra06986b] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A rare isolated tetranuclear 3d complex with a single metal CDC cuboid cage. It catalyzes cyclohexane peroxidative oxidation without any promoter.
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Affiliation(s)
- Susanta Hazra
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- Lisboa, Portugal
| | - Sanghamitra Mukherjee
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- Lisboa, Portugal
| | | | - Armando J. L. Pombeiro
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- Lisboa, Portugal
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