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Chen JN, Pan ZH, Sun FL, Wu PX, Zheng ST, Zhuang GL, Long LS, Zheng LS, Kong XJ. Tuning Electrocatalytic Water Oxidation Activity: Insights from the Active-Site Distance in LnCu 6 Clusters. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2401044. [PMID: 38516941 DOI: 10.1002/smll.202401044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 03/12/2024] [Indexed: 03/23/2024]
Abstract
Atomically precise metal clusters serve as a unique model for unraveling the intricate mechanism of the catalytic reaction and exploring the complex relationship between structure and activity. Herein, three series of water-soluble heterometallic clusters LnCu6, abbreviated as LnCu6-AC (Ln = La, Nd, Gd, Er, Yb; HAC = acetic acid), LnCu6-IM (Ln = La and Nd; IM = Imidazole), and LnCu6-IDA (Ln = Nd; H2IDA = Iminodiacetic acid) are presented, each featuring a uniform metallic core stabilized by distinct protected ligands. Crystal structure analysis reveals a triangular prism topology formed by six Cu2+ ions around one Ln3+ ion in LnCu6, with variations in Cu···Cu distances attributed to different ligands. Electrocatalytic oxygen evolution reaction (OER) shows that these different LnCu6 clusters exhibit different OER activities with remarkable turnover frequency of 135 s-1 for NdCu6-AC, 79 s-1 for NdCu6-IM and 32 s-1 for NdCu6-IDA. Structural analysis and Density Functional Theory (DFT) calculations underscore the correlation between shorter Cu···Cu distances and improves OER catalytic activity, emphasizing the pivotal role of active-site distance in regulating electrocatalytic OER activities. These results provide valuable insights into the OER mechanism and contribute to the design of efficient homogeneous OER electrocatalysts.
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Affiliation(s)
- Jia-Nan Chen
- State Key Laboratory of Physical Chemistry of Solid Surface and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Zhong-Hua Pan
- State Key Laboratory of Physical Chemistry of Solid Surface and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Fu-Li Sun
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Ping-Xin Wu
- Fujian Provincial Key Laboratory of Advanced Inorganic Oxygenated Materials, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Shou-Tian Zheng
- Fujian Provincial Key Laboratory of Advanced Inorganic Oxygenated Materials, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Gui-Lin Zhuang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032, China
| | - La-Sheng Long
- State Key Laboratory of Physical Chemistry of Solid Surface and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Lan-Sun Zheng
- State Key Laboratory of Physical Chemistry of Solid Surface and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Xiang-Jian Kong
- State Key Laboratory of Physical Chemistry of Solid Surface and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
- Fujian Key Laboratory of Rare-earth Functional Materials, Fujian Shanghai Collaborative Innovation Centre of Rare-earth Functional Materials, Longyan, 366300, China
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2
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Chowdhury SN, Biswas S, Das S, Biswas AN. Kinetic and mechanistic investigations of dioxygen reduction by a molecular Cu(II) catalyst bearing a pentadentate amidate ligand. Dalton Trans 2023; 52:11581-11590. [PMID: 37548356 DOI: 10.1039/d3dt02194g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/08/2023]
Abstract
A pentadentate Cu(II) complex, [CuII(dpaq)](ClO4) (1), featuring a redox active ligand, H-dpaq (H-dpaq = 2-[bis(pyridine-2-ylmethyl)]amino-N-quinolin-8-yl-acetamidate), catalyses four-electron reduction of dioxygen by decamethylferrocene (Fc*) in the presence of trifluoroacetic acid (CF3COOH) in acetone at 298 K. No catalytic oxygen reduction was observed in the presence of stronger Brønsted acids than CF3COOH, such as perchloric acid (HClO4) or trifluoromethanesulphonic acid (HOTf). In contrast, facile catalytic reduction of O2 occurs by Fc* with 1 and HClO4 or HOTf in dimethylformamide (DMF). The use of CF3COOH as the proton source in DMF results in the suppression of O2 reduction under otherwise identical reaction conditions. While the O2 reduction reactions in DMF are linearly dependent on the pKa of Brønsted acids, the acid dependence on catalytic O2-reduction reactivity by 1 in acetone showed complete reversal. Cyclic voltammetry studies using p-chloranil as the probe substrates in the presence of acids in the solvents reveal that the strengths of the protonic acids increase significantly in acetone compared to that in DMF. The amidate-N in [CuII(dpaq)](ClO4) (1) undergoes protonation in the presence of HClO4 or HOTf in DMF to form [CuII(H-dpaq)]2+ (1-H+), but not in the presence of CF3COOH. Enhanced acid strength of CF3COOH in acetone, however, effectively protonates 1 and triggers O2 reduction. Protonation of 1 with HClO4 or HOTf in acetone results in the change of its coordination environment, and this protonated species does not trigger O2 reduction. Detailed kinetic studies indicate that 1-H+ undergoes reduction by two-electrons and the reduced species binds O2 to form a Cu(II)-superoxo intermediate. This is followed by a rate-determining proton-coupled electron-transfer (PCET) reduction to generate the Cu(II)-hydroperoxo intermediate. While catalytic O2 reduction in acetone occurs predominantly via a 4e-/4H+ pathway, product selectivity (H2O vs. H2O2) in DMF depends upon the concentration of the reductant (Fc*). While dioxygen reduction to H2O2 is favoured at low [Fc*], mechanistic studies suggest that O2 reduction with high [Fc*] proceeds via a [2e- + 2e-] mechanism, where the released H2O2 during catalysis is further reduced to water.
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Affiliation(s)
- Srijan Narayan Chowdhury
- Department of Chemistry, National Institute of Technology Sikkim, Ravangla, South Sikkim 737139, India.
| | - Sachidulal Biswas
- Department of Chemistry, National Institute of Technology Sikkim, Ravangla, South Sikkim 737139, India.
| | - Saikat Das
- Department of Chemistry, National Institute of Technology Sikkim, Ravangla, South Sikkim 737139, India.
| | - Achintesh N Biswas
- Department of Chemistry, National Institute of Technology Sikkim, Ravangla, South Sikkim 737139, India.
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Transue WJ, Snyder RA, Caranto JD, Kurtz DM, Solomon EI. Particle Swarm Fitting of Spin Hamiltonians: Magnetic Circular Dichroism of Reduced and NO-Bound Flavodiiron Protein. Inorg Chem 2022; 61:16520-16527. [PMID: 36223761 PMCID: PMC9942269 DOI: 10.1021/acs.inorgchem.2c02234] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A particle swarm optimization (PSO) algorithm is described for the fitting of ground-state spin Hamiltonian parameters from variable-temperature/variable-field (VTVH) magnetic circular dichroism (MCD) data. This PSO algorithm is employed to define the ground state of two catalytic intermediates from a flavodiiron protein (FDP), a class of enzymes with nitric oxide reductase activity. The bimetallic iron active site of this enzyme proceeds through a biferrous intermediate and a mixed ferrous-{FeNO}7 intermediate during the catalytic cycle, and the MCD spectra of these intermediates are presented and analyzed. The fits of the spin Hamiltonians are shown to provide important geometric and electronic insight into these species that is compared and contrasted with previous reports.
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Affiliation(s)
| | - Rae Ana Snyder
- Department of Chemistry, Stanford University, Stanford, CA 94305
| | - Jonathan D. Caranto
- Department of Chemistry, University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Donald M. Kurtz
- Department of Chemistry, University of Texas at San Antonio, San Antonio, Texas 78249, United States
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Santoro C, Bollella P, Erable B, Atanassov P, Pant D. Oxygen reduction reaction electrocatalysis in neutral media for bioelectrochemical systems. Nat Catal 2022. [DOI: 10.1038/s41929-022-00787-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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5
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Geer AM, Musgrave III C, Webber C, Nielsen RJ, McKeown BA, Liu C, Schleker PPM, Jakes P, Jia X, Dickie DA, Granwehr J, Zhang S, Machan CW, Goddard WA, Gunnoe TB. Electrocatalytic Water Oxidation by a Trinuclear Copper(II) Complex. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01395] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Ana M. Geer
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Charles Musgrave III
- Materials and Process Simulation Center, Department of Chemistry, California Institute of Technology, Pasadena, California 91125, United States
| | - Christopher Webber
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Robert J. Nielsen
- Materials and Process Simulation Center, Department of Chemistry, California Institute of Technology, Pasadena, California 91125, United States
| | - Bradley A. McKeown
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Chang Liu
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - P. Philipp M. Schleker
- Department of Heterogeneous Reactions, Max Planck Institute for Chemical Energy Conversion, 45470 Mülheim an der Ruhr, Germany
- Institute of Energy and Climate Research - Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Peter Jakes
- Institute of Energy and Climate Research - Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Xiaofan Jia
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Diane A. Dickie
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Josef Granwehr
- Institute of Energy and Climate Research - Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich, 52425 Jülich, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, 52074 Aachen, Germany
| | - Sen Zhang
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Charles W. Machan
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - William A. Goddard
- Materials and Process Simulation Center, Department of Chemistry, California Institute of Technology, Pasadena, California 91125, United States
| | - T. Brent Gunnoe
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
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6
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Zhang W, Moore CE, Zhang S. Encapsulation of tricopper cluster in a synthetic cryptand enables facile redox processes from Cu ICu ICu I to Cu IICu IICu II states. Chem Sci 2020; 12:2986-2992. [PMID: 34164067 PMCID: PMC8179370 DOI: 10.1039/d0sc05441k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
One-pot reaction of tris(2-aminoethyl)amine (TREN), [CuI(MeCN)4]PF6, and paraformaldehyde affords a mixed-valent [TREN4CuIICuICuI(μ3-OH)](PF6)3 complex. The macrocyclic azacryptand TREN4 contains four TREN motifs, three of which provide a bowl-shape binding pocket for the [Cu3(μ3-OH)]3+ core. The fourth TREN caps on top of the tricopper cluster to form a cryptand, imposing conformational constraints and preventing solvent interaction. Contrasting the limited redox capability of synthetic tricopper complexes reported so far, [TREN4CuIICuICuI(μ3-OH)](PF6)3 exhibits several reversible single-electron redox events. The distinct electrochemical behaviors of [TREN4CuIICuICuI(μ3-OH)](PF6)3 and its solvent-exposed analog [TREN3CuIICuIICuII(μ3-O)](PF6)4 suggest that isolation of tricopper core in a cryptand enables facile electron transfer, allowing potential application of synthetic tricopper complexes as redox catalysts. Indeed, the fully reduced [TREN4CuICuICuI(μ3-OH)](PF6)2 can reduce O2 under acidic conditions. The geometric constraints provided by the cryptand are reminiscent of Nature's multicopper oxidases (MCOs). For the first time, a synthetic tricopper cluster was isolated and fully characterized at CuICuICuI (4a), CuIICuICuI (4b), and CuIICuIICuI (4c) states, providing structural and spectroscopic models for many intermediates in MCOs. Fast electron transfer rates (105 to 106 M-1 s-1) were observed for both CuICuICuI/CuIICuICuI and CuIICuICuI/CuIICuIICuI redox couples, approaching the rapid electron transfer rates of copper sites in MCO.
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Affiliation(s)
- Weiyao Zhang
- Department of Chemistry and Biochemistry, The Ohio State University 100 W. 18th Ave Columbus OH USA
| | - Curtis E Moore
- Department of Chemistry and Biochemistry, The Ohio State University 100 W. 18th Ave Columbus OH USA
| | - Shiyu Zhang
- Department of Chemistry and Biochemistry, The Ohio State University 100 W. 18th Ave Columbus OH USA
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7
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The in-plane spin helicity of coplanar helical spin configurations of frustrated single trimer V3 and Cu3 nanomagnets, inversion (switching) of spin helicity. Chem Phys 2019. [DOI: 10.1016/j.chemphys.2019.01.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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8
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9
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Haiduc I. Inverse coordination – An emerging new chemical concept. Oxygen and other chalcogens as coordination centers. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.02.016] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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10
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Quist DA, Diaz DE, Liu JJ, Karlin KD. Activation of dioxygen by copper metalloproteins and insights from model complexes. J Biol Inorg Chem 2017; 22:253-288. [PMID: 27921179 PMCID: PMC5600896 DOI: 10.1007/s00775-016-1415-2] [Citation(s) in RCA: 163] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Accepted: 11/11/2016] [Indexed: 02/08/2023]
Abstract
Nature uses dioxygen as a key oxidant in the transformation of biomolecules. Among the enzymes that are utilized for these reactions are copper-containing metalloenzymes, which are responsible for important biological functions such as the regulation of neurotransmitters, dioxygen transport, and cellular respiration. Enzymatic and model system studies work in tandem in order to gain an understanding of the fundamental reductive activation of dioxygen by copper complexes. This review covers the most recent advancements in the structures, spectroscopy, and reaction mechanisms for dioxygen-activating copper proteins and relevant synthetic models thereof. An emphasis has also been placed on cofactor biogenesis, a fundamentally important process whereby biomolecules are post-translationally modified by the pro-enzyme active site to generate cofactors which are essential for the catalytic enzymatic reaction. Significant questions remaining in copper-ion-mediated O2-activation in copper proteins are addressed.
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Affiliation(s)
- David A Quist
- Department of Chemistry, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Daniel E Diaz
- Department of Chemistry, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Jeffrey J Liu
- Department of Chemistry, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Kenneth D Karlin
- Department of Chemistry, Johns Hopkins University, Baltimore, MD, 21218, USA.
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11
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Elwell CE, Gagnon NL, Neisen BD, Dhar D, Spaeth AD, Yee GM, Tolman WB. Copper-Oxygen Complexes Revisited: Structures, Spectroscopy, and Reactivity. Chem Rev 2017; 117:2059-2107. [PMID: 28103018 PMCID: PMC5963733 DOI: 10.1021/acs.chemrev.6b00636] [Citation(s) in RCA: 445] [Impact Index Per Article: 63.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A longstanding research goal has been to understand the nature and role of copper-oxygen intermediates within copper-containing enzymes and abiological catalysts. Synthetic chemistry has played a pivotal role in highlighting the viability of proposed intermediates and expanding the library of known copper-oxygen cores. In addition to the number of new complexes that have been synthesized since the previous reviews on this topic in this journal (Mirica, L. M.; Ottenwaelder, X.; Stack, T. D. P. Chem. Rev. 2004, 104, 1013-1046 and Lewis, E. A.; Tolman, W. B. Chem. Rev. 2004, 104, 1047-1076), the field has seen significant expansion in the (1) range of cores synthesized and characterized, (2) amount of mechanistic work performed, particularly in the area of organic substrate oxidation, and (3) use of computational methods for both the corroboration and prediction of proposed intermediates. The scope of this review has been limited to well-characterized examples of copper-oxygen species but seeks to provide a thorough picture of the spectroscopic characteristics and reactivity trends of the copper-oxygen cores discussed.
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Affiliation(s)
- Courtney E Elwell
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - Nicole L Gagnon
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - Benjamin D Neisen
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - Debanjan Dhar
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - Andrew D Spaeth
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - Gereon M Yee
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - William B Tolman
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
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12
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Chiang CH, Tzeng YW, Yang CI, Nakano M, Wan WL, Lai LL, Lee GH. The synthesis of three new Cu5, Cu8 and Cu12 clusters via the use of a semi-flexible aminotriazine-based bis-methylpyridine ligand. Dalton Trans 2017; 46:1237-1248. [DOI: 10.1039/c6dt04236h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The use of a semi-flexible aminotriazine-based bis-methylpyridine ligand afforded three new Cu5, Cu8 and Cu12 complexes.
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Affiliation(s)
| | - Yen-Wen Tzeng
- Department of Chemistry
- Tunghai University
- Taichung 407
- Taiwan
| | - Chen-I. Yang
- Department of Chemistry
- Tunghai University
- Taichung 407
- Taiwan
| | - Motohiro Nakano
- Division of Applied Chemistry
- Graduate School of Engineering
- Osaka University
- Suita
- Japan
| | - Wun-Long Wan
- Department of Applied Chemistry
- National Chi Nan University
- Nantou 545
- Taiwan
| | - Long-Li Lai
- Department of Applied Chemistry
- National Chi Nan University
- Nantou 545
- Taiwan
| | - Gene-Hsiang Lee
- Department of Chemistry
- National Taiwan University
- Taipei
- Taiwan
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13
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Abstract
Oxygen intermediates in copper enzymes exhibit unique spectroscopic features that reflect novel geometric and electronic structures that are key to reactivity. This perspective will describe: (1) the bonding origin of the unique spectroscopic features of the coupled binuclear copper enzymes and how this overcomes the spin forbiddenness of O2 binding and activates monooxygenase activity, (2) how the difference in exchange coupling in the non-coupled binuclear Cu enzymes controls the reaction mechanism, and (3) how the trinuclear Cu cluster present in the multicopper oxidases leads to a major structure/function difference in enabling the irreversible reductive cleavage of the O-O bond with little overpotential and generating a fully oxidized intermediate, different from the resting enzyme studied by crystallography, that is key in enabling fast PCET in the reductive half of the catalytic cycle.
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14
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Machczynski MC, Babicz JT. Correlating the structures and activities of the resting oxidized and native intermediate states of a small laccase by paramagnetic NMR. J Inorg Biochem 2016; 159:62-9. [PMID: 26918900 DOI: 10.1016/j.jinorgbio.2016.02.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2015] [Revised: 01/10/2016] [Accepted: 02/10/2016] [Indexed: 02/01/2023]
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15
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Belinsky MI. Spin Chirality of Cu3 and V3 Nanomagnets. 1. Rotation Behavior of Vector Chirality, Scalar Chirality, and Magnetization in the Rotating Magnetic Field, Magnetochiral Correlations. Inorg Chem 2016; 55:4078-90. [DOI: 10.1021/acs.inorgchem.5b02202] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Moisey I. Belinsky
- School of Chemistry, Tel-Aviv University, Tel Aviv, Ramat Aviv 69978, Israel
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16
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Belinsky MI. Spin Chirality of Cu3 and V3 Nanomagnets. 2. Frustration, Temperature, and Distortion Dependence of Spin Chiralities and Magnetization in the Rotating and Tilted Magnetic Fields. Inorg Chem 2016; 55:4091-109. [DOI: 10.1021/acs.inorgchem.5b02204] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Moisey I. Belinsky
- School of Chemistry, Tel-Aviv University, Tel Aviv, Ramat Aviv 69978, Israel
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17
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Liu L, Peng YF, Lv XX, Li K, Li BL, Wu B. Construction of three coordination polymers based on tetranuclear copper(ii) clusters: syntheses, structures and photocatalytic properties. CrystEngComm 2016. [DOI: 10.1039/c5ce02492g] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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18
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Tenti L, Maynau D, Angeli C, Calzado CJ. Highly efficient perturbative + variational strategy based on orthogonal valence bond theory for the evaluation of magnetic coupling constants. Application to the trinuclear Cu(ii) site of multicopper oxidases. Phys Chem Chem Phys 2016; 18:18365-80. [DOI: 10.1039/c6cp03234f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new perturbative + variational strategy: a low-cost, quantitative and rational evaluation of the magnetic coupling constant in complex systems.
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Affiliation(s)
- Lorenzo Tenti
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università degli Studi di Ferrara
- 44121 Ferrara
- Italy
| | - Daniel Maynau
- Laboratoire de Chimie et Physique Quantique
- IRSAMC
- Université de Toulouse
- 31062 Toulouse
- France
| | - Celestino Angeli
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università degli Studi di Ferrara
- 44121 Ferrara
- Italy
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19
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Li J, Farrokhnia M, Rulíšek L, Ryde U. Catalytic Cycle of Multicopper Oxidases Studied by Combined Quantum- and Molecular-Mechanical Free-Energy Perturbation Methods. J Phys Chem B 2015; 119:8268-84. [DOI: 10.1021/acs.jpcb.5b02864] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Jilai Li
- Department
of Theoretical Chemistry, Lund University, Chemical Centre, P.O. Box 124, SE-221 00 Lund, Sweden
- Institute
of Theoretical Chemistry, Jilin University, Changchun 130023, People’s Republic of China
| | - Maryam Farrokhnia
- Department
of Theoretical Chemistry, Lund University, Chemical Centre, P.O. Box 124, SE-221 00 Lund, Sweden
- The
Persian Gulf Marine Biotechnology Research Center, The Persian Gulf
Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Lubomír Rulíšek
- Institute
of Organic Chemistry and Biochemistry, Gilead Sciences and IOCB Research
Center, Academy of Sciences of the Czech Republic, Flemingovo
náměstí 2, 166
10 Prague 6, Czech Republic
| | - Ulf Ryde
- Department
of Theoretical Chemistry, Lund University, Chemical Centre, P.O. Box 124, SE-221 00 Lund, Sweden
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20
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Fillman KL, Przyojski JA, Al-Afyouni MH, Tonzetich ZJ, Neidig ML. A combined magnetic circular dichroism and density functional theory approach for the elucidation of electronic structure and bonding in three- and four-coordinate iron(II)- N-heterocyclic carbene complexes. Chem Sci 2015; 6:1178-1188. [PMID: 25621143 PMCID: PMC4302958 DOI: 10.1039/c4sc02791d] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Accepted: 11/07/2014] [Indexed: 01/30/2023] Open
Abstract
The combination of iron salts and N-heterocyclic carbene (NHC) ligands is a highly effective combination in catalysis, with observed catalytic activities being highly dependent on the nature of the NHC ligand. Detailed spectroscopic and electronic structure studies have been performed on both three- and four-coordinate iron(II)-NHC complexes using a combined magnetic circular dichroism (MCD) and density functional theory (DFT) approach that provide detailed insight into the relative ligation properties of NHCs compared to traditional phosphine and amine ligands as well as the effects of NHC backbone structural variations on iron(II)-NHC bonding. Near-infrared MCD studies indicate that 10Dq(Td) for (NHC)2FeCl2 complexes is intermediate between those for comparable amine and phosphine complexes, demonstrating that such iron(II)-NHC and iron(II)-phosphine complexes are not simply analogues of one another. Theoretical studies including charge decomposition analysis indicate that the NHC ligands are slightly stronger donor ligands than phosphines but also result in significant weakening of the Fe-Cl bonds compared to phosphine and amine ligands. The net result is significant differences in the d orbital energies in four-coordinate (NHC)2FeCl2 complexes relative to the comparable phosphine complexes, where such electronic structure differences are likely a significant contributing factor to the differing catalytic performances observed with these ligands. Furthermore, Mössbauer, MCD and DFT studies of the effects of NHC backbone structure variations (i.e. saturated, unsaturated, chlorinated) on iron-NHC bonding and electronic structure in both three- and four-coordinate iron(II)-NHC complexes indicate only small differences as a function of backbone structure, that are likely amplified at lower oxidation states of iron due to the resulting decrease in the energy separation between the occupied iron d orbitals and the unoccupied NHC π* orbitals.
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Affiliation(s)
- Kathlyn L. Fillman
- Department of Chemistry , University of Rochester , Rochester , New York 14627 , USA .
| | - Jacob A. Przyojski
- Department of Chemistry , University of Texas at San Antonio , San Antonio , Texas 78249 , USA
| | - Malik H. Al-Afyouni
- Department of Chemistry , University of Rochester , Rochester , New York 14627 , USA .
| | - Zachary J. Tonzetich
- Department of Chemistry , University of Texas at San Antonio , San Antonio , Texas 78249 , USA
| | - Michael L. Neidig
- Department of Chemistry , University of Rochester , Rochester , New York 14627 , USA .
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21
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Croitor L, Coropceanu EB, Petuhov O, Krämer KW, Baca SG, Liu SX, Decurtins S, Fonari MS. A one-dimensional coordination polymer based on Cu3-oximato metallacrowns bridged by benzene-1,4-dicarboxylato ligands: structure and magnetic properties. Dalton Trans 2015; 44:7896-902. [DOI: 10.1039/c5dt00533g] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A one-dimensional linear coordination polymer {[Cu3(μ3-OH)(2-pyao)3(bdc)]·6(H2O)}n (1) composed of trinuclear metallacrown cores has been obtained.
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Affiliation(s)
- Lilia Croitor
- Institute of Applied Physics
- Academy of Sciences of R. Moldova
- Chisinau
- Moldova
| | | | - Oleg Petuhov
- Institute of Chemistry
- Academy of Sciences of R. Moldova
- Chisinau
- Moldova
| | - Karl W. Krämer
- Department of Chemistry and Biochemistry
- University of Bern
- 3012 Bern
- Switzerland
| | - Svetlana G. Baca
- Institute of Applied Physics
- Academy of Sciences of R. Moldova
- Chisinau
- Moldova
| | - Shi-Xia Liu
- Department of Chemistry and Biochemistry
- University of Bern
- 3012 Bern
- Switzerland
| | - Silvio Decurtins
- Department of Chemistry and Biochemistry
- University of Bern
- 3012 Bern
- Switzerland
| | - Marina S. Fonari
- Institute of Applied Physics
- Academy of Sciences of R. Moldova
- Chisinau
- Moldova
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22
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Valencia I, Ávila-Torres Y, Barba-Behrens N, Garzón IL. Structural, vibrational, and electronic properties of an uncoordinated pseudoephedrine derivative and its mononuclear and trinuclear copper(II)-coordinated compounds: A combined theoretical and experimental study. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2014.08.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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23
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Solomon EI, Heppner DE, Johnston EM, Ginsbach JW, Cirera J, Qayyum M, Kieber-Emmons MT, Kjaergaard CH, Hadt RG, Tian L. Copper active sites in biology. Chem Rev 2014; 114:3659-853. [PMID: 24588098 PMCID: PMC4040215 DOI: 10.1021/cr400327t] [Citation(s) in RCA: 1138] [Impact Index Per Article: 113.8] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
| | - David E. Heppner
- Department of Chemistry, Stanford University, Stanford, CA, 94305
| | | | - Jake W. Ginsbach
- Department of Chemistry, Stanford University, Stanford, CA, 94305
| | - Jordi Cirera
- Department of Chemistry, Stanford University, Stanford, CA, 94305
| | - Munzarin Qayyum
- Department of Chemistry, Stanford University, Stanford, CA, 94305
| | | | | | - Ryan G. Hadt
- Department of Chemistry, Stanford University, Stanford, CA, 94305
| | - Li Tian
- Department of Chemistry, Stanford University, Stanford, CA, 94305
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24
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de Visser SP, Quesne MG, Martin B, Comba P, Ryde U. Computational modelling of oxygenation processes in enzymes and biomimetic model complexes. Chem Commun (Camb) 2014; 50:262-82. [DOI: 10.1039/c3cc47148a] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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25
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Zhu X, Zhao S, Peng YF, Li BL, Wu B. A (3,14)-connected three-dimensional metal–organic framework based on the unprecedented enneanuclear copper(ii) cluster [Cu9(μ3-OH)4(μ2-OH)2]. CrystEngComm 2013. [DOI: 10.1039/c3ce41086b] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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26
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Rulíšek L, Ryde U. Theoretical studies of the active-site structure, spectroscopic and thermodynamic properties, and reaction mechanism of multicopper oxidases. Coord Chem Rev 2013. [DOI: 10.1016/j.ccr.2012.04.019] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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27
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Ghiladi RA, Rheingold AL, Siegler MA, Karlin KD. Synthesis and Characterization of New Trinuclear Copper Complexes. Inorganica Chim Acta 2012; 389:131-137. [PMID: 22773847 DOI: 10.1016/j.ica.2012.02.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
This report describes our approach towards modelling the copper cluster active sites of nitrous oxide reductase and the multicopper oxidases/oxygenases. We have synthesized two mesitylene-based trinucleating ligands, MesPY1 and MesPY2, which employ bis(2-picolyl)amine (PY1) and bis(2-pyridylethyl)amine (PY2) tridentate copper chelates, respectively. Addition of cuprous salts to these ligands leads to the isolation of tricopper(I) complexes [(Mes-PY1)Cu(I) (3)(CH(3)CN)(3)](ClO(4))(3)·0.25Et(2)O (1) and [(Mes-PY2)Cu(I) (3)](PF(6))(3) (3) Each of the three copper centers in 1 is most likely four-coordinate, with ligated acetonitrile as the fourth ligand; by contrast, the copper centers in 3 are three-coordinate, as determined by X-ray crystallography The synthesis of [(Mes-PY1)Cu(II) (3)(CH(3)CN)(2)(CH(3)OH)(2)](ClO(4))(6)·(CH(3)OH) (2) was accomplished by addition of three equivalents of the copper(II) salt, Cu(ClO(4))(2)·6H(2)O, to the ligand. The structure of 2 shows that two of the copper centers are tetracoordinate (with MeCN solvent ligation), but have additional weak axial (fifth ligand) interactions with the perchlorate anions; the third copper is unique in that it is coordinated by two MeOH solvent molecules, making it overall five-coordinate. For complexes 2 and 3, one copper ion center is located on the opposite side of the mesitylene plane as the other two. These observations, although in the solid state, must be taken into account for future studies where intramolecular tricopper(I)/O(2) (or other small molecules of interest) interactions in solution are desirable.
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Affiliation(s)
- Reza A Ghiladi
- Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218, USA
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28
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Tahsini L, Kotani H, Lee YM, Cho J, Nam W, Karlin KD, Fukuzumi S. Electron-transfer reduction of dinuclear copper peroxo and bis-μ-oxo complexes leading to the catalytic four-electron reduction of dioxygen to water. Chemistry 2012; 18:1084-93. [PMID: 22237962 PMCID: PMC3316124 DOI: 10.1002/chem.201103215] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2011] [Indexed: 11/11/2022]
Abstract
The four-electron reduction of dioxygen by decamethylferrocene (Fc*) to water is efficiently catalyzed by a binuclear copper(II) complex (1) and a mononuclear copper(II) complex (2) in the presence of trifluoroacetic acid in acetone at 298 K. Fast electron transfer from Fc* to 1 and 2 affords the corresponding Cu(I) complexes, which react at low temperature (193 K) with dioxygen to afford the η(2):η(2)-peroxo dicopper(II) (3) and bis-μ-oxo dicopper(III) (4) intermediates, respectively. The rate constants for electron transfer from Fc* and octamethylferrocene (Me(8)Fc) to 1 as well as electron transfer from Fc* and Me(8)Fc to 3 were determined at various temperatures, leading to activation enthalpies and entropies. The activation entropies of electron transfer from Fc* and Me(8)Fc to 1 were determined to be close to zero, as expected for outer-sphere electron-transfer reactions without formation of any intermediates. For electron transfer from Fc* and Me(8)Fc to 3, the activation entropies were also found to be close to zero. Such agreement indicates that the η(2):η(2)-peroxo complex (3) is directly reduced by Fc* rather than via the conversion to the corresponding bis-μ-oxo complex, followed by the electron-transfer reduction by Fc* leading to the four-electron reduction of dioxygen to water. The bis-μ-oxo species (4) is reduced by Fc* with a much faster rate than the η(2):η(2)-peroxo complex (3), but this also leads to the four-electron reduction of dioxygen to water.
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Affiliation(s)
- Laleh Tahsini
- Department of Bioinspired Science, Ewha Womans University, Seoul 120-750 (Korea)
| | - Hiroaki Kotani
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, ALCA (Japan) Science and Technology Agency (JST), Suita, Osaka 565-0871 (Japan), Fax: (+81)-6-6879-7368
| | - Yong-Min Lee
- Department of Bioinspired Science, Ewha Womans University, Seoul 120-750 (Korea)
| | - Jaeheung Cho
- Department of Bioinspired Science, Ewha Womans University, Seoul 120-750 (Korea)
| | - Wonwoo Nam
- Department of Bioinspired Science, Ewha Womans University, Seoul 120-750 (Korea)
| | - Kenneth D. Karlin
- Department of Bioinspired Science, Ewha Womans University, Seoul 120-750 (Korea)
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218 (USA)
| | - Shunichi Fukuzumi
- Department of Bioinspired Science, Ewha Womans University, Seoul 120-750 (Korea)
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, ALCA (Japan) Science and Technology Agency (JST), Suita, Osaka 565-0871 (Japan), Fax: (+81)-6-6879-7368
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29
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Ferrer S, Lloret F, Pardo E, Clemente-Juan JM, Liu-González M, García-Granda S. Antisymmetric Exchange in Triangular Tricopper(II) Complexes: Correlation among Structural, Magnetic, and Electron Paramagnetic Resonance Parameters. Inorg Chem 2011; 51:985-1001. [DOI: 10.1021/ic2020034] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sacramento Ferrer
- Departament de Química Inorgànica, Universitat de València, Vicent Andrés Estellés
s/n, 46100 Burjassot, Valencia, Spain
| | - Francesc Lloret
- Institut de Ciència Molecular, Universitat de València, Catedràtic José Beltrán
n° 2, 46980 Paterna, Valencia, Spain
| | - Emilio Pardo
- Institut de Ciència Molecular, Universitat de València, Catedràtic José Beltrán
n° 2, 46980 Paterna, Valencia, Spain
| | - Juan Modesto Clemente-Juan
- Institut de Ciència Molecular, Universitat de València, Catedràtic José Beltrán
n° 2, 46980 Paterna, Valencia, Spain
| | - Malva Liu-González
- SCSIE-Rayos X, Universitat de València, Vicent Andrés Estellés s/n, 46100 Burjassot, Valencia,
Spain
| | - Santiago García-Granda
- Departamento de Química
Física y Analítica, Universidad de Oviedo, Julián Clavería 8, 33006 Oviedo, Spain
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30
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Hu L, Farrokhnia M, Heimdal J, Shleev S, Rulíšek L, Ryde U. Reorganization energy for internal electron transfer in multicopper oxidases. J Phys Chem B 2011; 115:13111-26. [PMID: 21955325 DOI: 10.1021/jp205897z] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
We have calculated the reorganization energy for the intramolecular electron transfer between the reduced type 1 copper site and the peroxy intermediate of the trinuclear cluster in the multicopper oxidase CueO. The calculations are performed at the combined quantum mechanics and molecular mechanics (QM/MM) level, based on molecular dynamics simulations with tailored potentials for the two copper sites. We obtain a reorganization energy of 91-133 kJ/mol, depending on the theoretical treatment. The two Cu sites contribute by 12 and 22 kJ/mol to this energy, whereas the solvent contribution is 34 kJ/mol. The rest comes from the protein, involving small contributions from many residues. We have also estimated the energy difference between the two electron-transfer states and show that the reduction of the peroxy intermediate is exergonic by 43-87 kJ/mol, depending on the theoretical method. Both the solvent and the protein contribute to this energy difference, especially charged residues close to the two Cu sites. We compare these estimates with energies obtained from QM/MM optimizations and QM calculations in a vacuum and discuss differences between the results obtained at various levels of theory.
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Affiliation(s)
- Lihong Hu
- Department of Theoretical Chemistry, Lund University, Lund, Sweden
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31
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Assey G, Butcher RJ, Gultneh Y. μ-Bromido-bis{μ-2,2'-[4,7-diaza-decane-1,10-diylbis(nitrilo-methanylyl-idene)]diphenolato}tricopper(II) bromide dimethyl-formamide disolvate. Acta Crystallogr Sect E Struct Rep Online 2011; 67:m1197-8. [PMID: 22058844 PMCID: PMC3200975 DOI: 10.1107/s160053681103090x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2011] [Accepted: 08/01/2011] [Indexed: 11/10/2022]
Abstract
The complex mol-ecule of the title compound, [Cu(3)Br(C(22)H(28)N(4)O(2))(2)]Br·2C(3)H(7)NO, contains three copper atoms, two of which are five-coordinate within a square-pyramidal environment and linked by a bridging Br atom occupying the apical position in each square pyramid. The remaining Cu atom is four-coordinate but with considerable tetra-hedral disortion [the dihedral angle between the two chelate planes is 69.21 (7)°]. There are two mol-ecules of dimethyl-formamide (DMF) present as solvent mol-ecules, one of which is disordered over two equivalent conformations with occupancies of 0.603 (5) and 0.397 (5). The amine H atoms are involved in both inter- and intra-molecular hydrogen-bonding inter-actions with the Br and O atoms of the cation, as well as with the O atom of the ordered DMF mol-ecule.
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Affiliation(s)
- Gervas Assey
- Department of Chemistry, Howard University, 525 College Street NW, Washington, DC 20059, USA
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32
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Zhekova HR, Seth M, Ziegler T. First Principle Simulation of the Temperature Dependent Magnetic Circular Dichroism of a Trinuclear Copper Complex in the Presence of Zero Field Splitting. J Phys Chem A 2011; 115:10323-34. [DOI: 10.1021/jp203326m] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Hristina R. Zhekova
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Michael Seth
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Tom Ziegler
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
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33
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Zhekova H, Seth M, Ziegler T. Introduction of a New Theory for the Calculation of Magnetic Coupling Based on Spin–Flip Constricted Variational Density Functional Theory. Application to Trinuclear Copper Complexes which Model the Native Intermediate in Multicopper Oxidases. J Chem Theory Comput 2011; 7:1858-66. [DOI: 10.1021/ct200141v] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hristina Zhekova
- Department of Chemistry, University of Calgary, Calgary, Alberta Canada T2N 1N4
| | - Michel Seth
- Department of Chemistry, University of Calgary, Calgary, Alberta Canada T2N 1N4
| | - Tom Ziegler
- Department of Chemistry, University of Calgary, Calgary, Alberta Canada T2N 1N4
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34
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Solomon EI, Ginsbach JW, Heppner DE, Kieber-Emmons MT, Kjaergaard CH, Smeets PJ, Tian L, Woertink JS. Copper dioxygen (bio)inorganic chemistry. Faraday Discuss 2011; 148:11-39; discussion 97-108. [PMID: 21322475 DOI: 10.1039/c005500j] [Citation(s) in RCA: 141] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cu/O2 intermediates in biological, homogeneous, and heterogeneous catalysts exhibit unique spectral features that reflect novel geometric and electronic structures that make significant contributions to reactivity. This review considers how the respective intermediate electronic structures overcome the spin-forbidden nature of O2 binding, activate O2 for electrophilic aromatic attack and H-atom abstraction, catalyze the 4 e- reduction of O2 to H2O, and discusses the role of exchange coupling between Cu ions in determining reactivity.
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Affiliation(s)
- Edward I Solomon
- Department of Chemistry, Stanford University, 333 Campus Drive, Stanford, CA 94305, USA.
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35
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A chiral copper(II) inverse-9-metallacrown-3 complex: Synthesis, crystal structure, ferroelectric and magnetic properties. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2010.12.067] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Bernini R, Crisante F, Gentili P, Morana F, Pierini M, Piras M. Chemoselective C-4 aerobic oxidation of catechin derivatives catalyzed by the Trametes villosa laccase/1-hydroxybenzotriazole system: synthetic and mechanistic aspects. J Org Chem 2011; 76:820-32. [PMID: 21204551 DOI: 10.1021/jo101886s] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Catechin derivatives were oxidized in air in the presence of the Trametes villosa laccase/1-hydroxybenzotriazole (HBT) system in buffered water/1,4-dioxane as reaction medium. The oxidation products, flavan-3,4-diols and the corresponding C-4 ketones, are bioactive compounds and useful intermediates for the hemisynthesis of proanthocyanidins, plant polyphenols which provide beneficial health properties for humans. Determinations of oxidation potentials excluded that catechin derivatives could be directly oxidized by laccase Cu(II), while it resulted in the H-abstraction from benzylic positions being promptly promoted by the enzyme in the presence of the mediator HBT, the parent species producing in situ the reactive intermediate benzotriazole-N-oxyl (BTNO) radical. A remarkable and unexpected result for the laccase/HBT oxidative system has been the chemoselective insertion of the oxygen atom into the C-4-H bond of catechin derivatives. Mechanistic aspects of the oxidation reaction have been investigated in detail for the first time in order to corroborate these results. Since the collected experimental findings could not alone provide information useful to clarify the origin of the observed chemoselectivity, these data were expressly supplemented with information derived by suitable molecular modeling investigations. The integrated evaluation of the dissociation energies of the C-H bonds calculated both by semiempirical and DFT methods and the differential activation energies of the process estimated by a molecular modeling approach suggested that the observed selective oxidation at the C-4 carbon has a kinetic origin.
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Affiliation(s)
- Roberta Bernini
- Dipartimento di Agrobiologia e Agrochimica, Università degli Studi della Tuscia, Viterbo, Italy.
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37
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Srnec M, Ryde U, Rulíšek L. Reductive cleavage of the O–O bond in multicopper oxidases: a QM/MM and QM study. Faraday Discuss 2011; 148:41-53; discussion 97-108. [DOI: 10.1039/c004476h] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Zaballa ME, Ziegler L, Kosman DJ, Vila AJ. NMR study of the exchange coupling in the trinuclear cluster of the multicopper oxidase Fet3p. J Am Chem Soc 2010; 132:11191-6. [PMID: 20698686 DOI: 10.1021/ja1037148] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Fet3p from Saccharomyces cerevisiae is a multicopper oxidase (MCO) which oxidizes Fe(2+) to Fe(3+). The electronic structure of the different copper centers in this family of enzymes has been extensively studied and discussed for years with a particular focus on the exchange coupling regime in the trinuclear cluster (TNC). Using NMR spectroscopy we have quantified the exchange coupling constant in the type 3 center in a fully metalated oxidase; this value in Fet3p is significantly higher than that reported for proteins containing isolated type 3 centers as tyrosinase. We also provide evidence of exchange coupling between the type 2 and the type 3 Cu(2+) ions, which supports the crystallographic evidence of dioxygen binding to the TNC. This work provides the foundation for the application of NMR to these complex systems.
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Affiliation(s)
- María-Eugenia Zaballa
- IBR (Instituto de Biología Molecular y Celular de Rosario), CONICET, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, (S2002LRK), Rosario, Argentina
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39
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Vancoillie S, Chalupský J, Ryde U, Solomon EI, Pierloot K, Neese F, Rulísek L. Multireference ab initio calculations of g tensors for trinuclear copper clusters in multicopper oxidases. J Phys Chem B 2010; 114:7692-702. [PMID: 20469875 DOI: 10.1021/jp103098r] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
EPR spectroscopy has proven to be an indispensable tool in elucidating the structure of metal sites in proteins. In recent years, experimental EPR data have been complemented by theoretical calculations, which have become a standard tool of many quantum chemical packages. However, there have only been a few attempts to calculate EPR g tensors for exchange-coupled systems with more than two spins. In this work, we present a quantum chemical study of structural, electronic, and magnetic properties of intermediates in the reaction cycle of multicopper oxidases and of their inorganic models. All these systems contain three copper(II) ions bridged by hydroxide or O(2-) anions and their ground states are antiferromagnetically coupled doublets. We demonstrate that only multireference methods, such as CASSCF/CASPT2 or MRCI can yield qualitatively correct results (compared to the experimental values) and consider the accuracy of the calculated EPR g tensors as the current benchmark of quantum chemical methods. By decomposing the calculated g tensors into terms arising from interactions of the ground state with the various excited states, the origin of the zero-field splitting is explained. The results of the study demonstrate that a truly quantitative prediction of the g tensors of exchange-coupled systems is a great challenge to contemporary theory. The predictions strongly depend on small energy differences that are difficult to predict with sufficient accuracy by any quantum chemical method that is applicable to systems of the size of our target systems.
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Affiliation(s)
- Steven Vancoillie
- Department of Chemistry, University of Leuven, Celestijnenlaan 200F, B-3001 Heverlee-Leuven, Belgium
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40
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Augustine AJ, Kjaergaard C, Qayyum M, Ziegler L, Kosman DJ, Hodgson KO, Hedman B, Solomon EI. Systematic perturbation of the trinuclear copper cluster in the multicopper oxidases: the role of active site asymmetry in its reduction of O2 to H2O. J Am Chem Soc 2010; 132:6057-67. [PMID: 20377263 DOI: 10.1021/ja909143d] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The multicopper oxidase Fet3p catalyzes the four-electron reduction of dioxygen to water, coupled to the one-electron oxidation of four equivalents of substrate. To carry out this process, the enzyme utilizes four Cu atoms: a type 1, a type 2, and a coupled binuclear, type 3 site. Substrates are oxidized at the T1 Cu, which rapidly transfers electrons, 13 A away, to a trinuclear copper cluster composed of the T2 and T3 sites, where dioxygen is reduced to water in two sequential 2e(-) steps. This study focuses on two variants of Fet3p, H126Q and H483Q, that perturb the two T3 Cu's, T3alpha and T3beta, respectively. The variants have been isolated in both holo and type 1 depleted (T1D) forms, T1DT3alphaQ and T1DT3betaQ, and their trinuclear copper clusters have been characterized in their oxidized and reduced states. While the variants are only mildly perturbed relative to T1D in the resting oxidized state, in contrast to T1D they are both found to have lost a ligand in their reduced states. Importantly, T1DT3alphaQ reacts with O(2), but T1DT3betaQ does not. Thus loss of a ligand at T3beta, but not at T3alpha, turns off O(2) reactivity, indicating that T3beta and T2 are required for the 2e(-) reduction of O(2) to form the peroxide intermediate (PI), whereas T3alpha remains reduced. This is supported by the spectroscopic features of PI in T1DT3alphaQ, which are identical to T1D PI. This selective redox activity of one edge of the trinuclear cluster demonstrates its asymmetry in O(2) reactivity. The structural origin of this asymmetry between the T3alpha and T3beta is discussed, as is its contribution to reactivity.
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Affiliation(s)
- Anthony J Augustine
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
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Afrati T, Pantazaki AA, Dendrinou-Samara C, Raptopoulou C, Terzis A, Kessissoglou DP. Copper inverse-9-metallacrown-3 compounds interacting with DNA. Dalton Trans 2010; 39:765-75. [DOI: 10.1039/b914112j] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Zhu X, Zhao JW, Li BL, Song Y, Zhang YM, Zhang Y. A Two-Dimensional Metal-Organic Framework Based on a Ferromagnetic Pentanuclear Copper(II). Inorg Chem 2009; 49:1266-70. [PMID: 20039702 DOI: 10.1021/ic902404b] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xia Zhu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry and Chemical Engineering and Material Science, Soochow University, Suzhou 215123, People's Republic of China
| | - Jun-Wei Zhao
- School of Chemistry and Chemical Engineering, Henan University, Kaifeng 475001, People's Republic of China
| | - Bao-Long Li
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry and Chemical Engineering and Material Science, Soochow University, Suzhou 215123, People's Republic of China
- State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China
| | - You Song
- State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China
| | - Yu-Mei Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry and Chemical Engineering and Material Science, Soochow University, Suzhou 215123, People's Republic of China
| | - Yong Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry and Chemical Engineering and Material Science, Soochow University, Suzhou 215123, People's Republic of China
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Vancoillie S, Rulíšek L, Neese F, Pierloot K. Theoretical Description of the Structure and Magnetic Properties of Nitroxide−Cu(II)−Nitroxide Spin Triads by Means of Multiconfigurational Ab Initio Calculations. J Phys Chem A 2009; 113:6149-57. [DOI: 10.1021/jp900822v] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Steven Vancoillie
- Department of Chemistry, University of Leuven, Celestijnenlaan 200F, B-3001 Heverlee-Leuven, Belgium, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, and Gilead Sciences Research Center at IOCB, Flemingovo nam. 2, 166 10 Praha 6, Czech Republic, and Institut für Pysikalische and Theoretische Chemie, Universität Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany
| | - Lubomír Rulíšek
- Department of Chemistry, University of Leuven, Celestijnenlaan 200F, B-3001 Heverlee-Leuven, Belgium, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, and Gilead Sciences Research Center at IOCB, Flemingovo nam. 2, 166 10 Praha 6, Czech Republic, and Institut für Pysikalische and Theoretische Chemie, Universität Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany
| | - Frank Neese
- Department of Chemistry, University of Leuven, Celestijnenlaan 200F, B-3001 Heverlee-Leuven, Belgium, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, and Gilead Sciences Research Center at IOCB, Flemingovo nam. 2, 166 10 Praha 6, Czech Republic, and Institut für Pysikalische and Theoretische Chemie, Universität Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany
| | - Kristine Pierloot
- Department of Chemistry, University of Leuven, Celestijnenlaan 200F, B-3001 Heverlee-Leuven, Belgium, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, and Gilead Sciences Research Center at IOCB, Flemingovo nam. 2, 166 10 Praha 6, Czech Republic, and Institut für Pysikalische and Theoretische Chemie, Universität Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany
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Unique Spectroscopic Features and Electronic Structures of Copper Proteins: Relation to Reactivity. HIGH RESOLUTION EPR 2009. [DOI: 10.1007/978-0-387-84856-3_11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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Khanra S, Weyhermüller T, Chaudhuri P. A nonanuclear copper(II) cluster incorporating endogenous alkoxo- and exogenous hydroxo bridges containing [Cu3(μ3-OH)] cores. Dalton Trans 2009:3847-53. [PMID: 19417952 DOI: 10.1039/b900711c] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Sumit Khanra
- Max-Planck Institute for Bioinorganic Chemistry, Stiftstrasse 34-36, D-45470, Mülheim an der Ruhr, Germany
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Afrati T, Dendrinou-Samara C, Raptopoulou C, Terzis A, Tangoulis V, Tsipis A, Kessissoglou DP. Experimental and Theoretical Study of the Antisymmetric Magnetic Behavior of Copper inverse-9-Metallacrown-3 Compounds. Inorg Chem 2008; 47:7545-55. [PMID: 18681422 DOI: 10.1021/ic8003257] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tereza Afrati
- Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece, NCSR “Demokritos”, Institute of Materials Science, 15310 Aghia Paraskevi Attikis, Greece, and Laboratory of Inorganic and General Chemistry, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece
| | - Catherine Dendrinou-Samara
- Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece, NCSR “Demokritos”, Institute of Materials Science, 15310 Aghia Paraskevi Attikis, Greece, and Laboratory of Inorganic and General Chemistry, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece
| | - Catherine Raptopoulou
- Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece, NCSR “Demokritos”, Institute of Materials Science, 15310 Aghia Paraskevi Attikis, Greece, and Laboratory of Inorganic and General Chemistry, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece
| | - Aris Terzis
- Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece, NCSR “Demokritos”, Institute of Materials Science, 15310 Aghia Paraskevi Attikis, Greece, and Laboratory of Inorganic and General Chemistry, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece
| | - Vassilis Tangoulis
- Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece, NCSR “Demokritos”, Institute of Materials Science, 15310 Aghia Paraskevi Attikis, Greece, and Laboratory of Inorganic and General Chemistry, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece
| | - Athanassios Tsipis
- Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece, NCSR “Demokritos”, Institute of Materials Science, 15310 Aghia Paraskevi Attikis, Greece, and Laboratory of Inorganic and General Chemistry, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece
| | - Dimitris P. Kessissoglou
- Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece, NCSR “Demokritos”, Institute of Materials Science, 15310 Aghia Paraskevi Attikis, Greece, and Laboratory of Inorganic and General Chemistry, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece
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Abstract
In nature the four electron reduction of O2 to H2O is carried out by Cytochrome c oxidase (CcO) and the multicopper oxidases (MCOs). In the former, Cytochrome c provides electrons for pumping protons to produce a gradient for ATP synthesis, while in the MCOs the function is the oxidation of substrates, either organic or metal ions. In the MCOs the reduction of O2 is carried out at a trinuclear Cu cluster (TNC). Oxygen intermediates have been trapped which exhibit unique spectroscopic features that reflect novel geometric and electronic structures. These intermediates have both intact and cleaved O-O bonds, allowing the reductive cleavage of the O-O bond to be studied in detail both experimentally and computationally. These studies show that the topology of the TNC provides a unique geometric and electronic structure particularly suited to carry out this key reaction in nature.
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Affiliation(s)
- Edward I Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, USA.
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Sarangi R, Gorelsky SI, Basumallick L, Hwang HJ, Pratt RC, Stack TDP, Lu Y, Hodgson KO, Hedman B, Solomon EI. Spectroscopic and density functional theory studies of the blue-copper site in M121SeM and C112SeC azurin: Cu-Se versus Cu-S bonding. J Am Chem Soc 2008; 130:3866-77. [PMID: 18314977 PMCID: PMC2713798 DOI: 10.1021/ja076495a] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
S K-edge X-ray absorption, UV-vis absorption, magnetic circular dichroism (MCD), and resonance Raman spectroscopies are used to investigate the electronic structure differences among WT, M121SeM, and C112SeC Pseudomonas aeruginosa (P.a) azurin. A comparison of S K-edge XAS of WT and M121SeM azurin and a CuII-thioether model complex shows that the 38% S character in the ground state wave function of the blue-copper (BC) sites solely reflects the Cu-SCys bond. Resonance Raman (rR) data on WT and C112SeC azurin give direct evidence for the kinematic coupling between the Cu-SCys stretch and the cysteine deformation modes in WT azurin, which leads to multiple features in the rR spectrum of the BC site. The UV-vis absorption and MCD data on WT, M121SeM, and C112SeC give very similar C0/D0 ratios, indicating that the C-term MCD intensity mechanism involves Cu-centered spin-orbit coupling (SOC). The spectroscopic data combined with density functional theory (DFT) calculations indicate that SCys and SeCys have similar covalent interactions with Cu at their respective bond lengths of 2.1 and 2.3 A. This reflects the similar electronegativites of S and Se in the thiolate/selenolate ligand fragment and explains the strong spectroscopic similarities between WT and C112SeC azurin.
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Ganyushin D, Neese F. First-principles calculations of magnetic circular dichroism spectra. J Chem Phys 2008; 128:114117. [DOI: 10.1063/1.2894297] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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