1
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Chowdhury B, Mehebub Rahaman S, Ghosh A, Mahali K, Sar P, Saha B. Synergistic reinforcement of CPC/TX-100 mixed micellar microenvironment for diperiodatocuprate(III) (DPC) oxidation of 1-propanol and 1,3-propanediol. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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2
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Chowdhury B, Sar P, Kumar D, Saha B. Advancement of Cu(III) and Fe(III) directed oxidative transformations: Recent impact of aqueous micellar environment. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.117993] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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3
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Ibrahim MM, Fathy AM, Al‐Harbi SA, Ramadan AEM. Triazole based copper(
II
) complexes: Synthesis, spectroscopic characterization, Density Function Theory study, and biomimicking of copper containing oxidase proteins. J CHIN CHEM SOC-TAIP 2021. [DOI: 10.1002/jccs.202100048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mohamed M. Ibrahim
- Chemistry Department, College of Science Taif University Taif Saudi Arabia
| | - Ahmad M. Fathy
- Chemistry Department, Faculty of Science Zagazig University Zagazig Egypt
| | - Sami A. Al‐Harbi
- Chemistry Department, University College in Al‐Jamoum Umm Al‐Qura University Makkah Saudi Arabia
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4
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Lu X, Gao S, Lin H, Yu L, Han Y, Zhu P, Bao W, Yao H, Chen Y, Shi J. Bioinspired Copper Single-Atom Catalysts for Tumor Parallel Catalytic Therapy. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2002246. [PMID: 32705751 DOI: 10.1002/adma.202002246] [Citation(s) in RCA: 167] [Impact Index Per Article: 41.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 06/15/2020] [Indexed: 05/15/2023]
Abstract
The oxidation of intracellular biomolecules by reactive oxygen species (ROS) forms the basis for ROS-based tumor therapy. However, the current therapeutic modalities cannot catalyze H2 O2 and O2 concurrently for ROS generation, thereby leading to unsatisfactory therapeutic efficacy. Herein, it is reported a bioinspired hollow N-doped carbon sphere doped with a single-atom copper species (Cu-HNCS) that can directly catalyze the decomposition of both oxygen and hydrogen peroxide to ROS, namely superoxide ion (O2 •- ) and the hydroxyl radical (•OH), respectively, in an acidic tumor microenvironment for the oxidation of intracellular biomolecules without external energy input, thus resulting in an enhanced tumor growth inhibitory effect. Notably, the Fenton reaction turnover frequency of Cu species in Cu-HNCS is ≈5000 times higher than that of Fe in commercial Fe3 O4 nanoparticles. Experimental results and density functional theory calculations reveal that the high catalytic activity of Cu-HNCS originates from the single-atom copper, and the calculation predicts a next-generation Fenton catalyst. This work provides an effective paradigm of tumor parallel catalytic therapy for considerably enhanced therapeutic efficacy.
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Affiliation(s)
- Xiangyu Lu
- State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Shanshan Gao
- School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, P. R. China
| | - Han Lin
- State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China
| | - Luodan Yu
- State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China
| | - Yunhu Han
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
| | - Piao Zhu
- State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Weichao Bao
- State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China
| | - Heliang Yao
- State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China
| | - Yu Chen
- State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jianlin Shi
- State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China
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5
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Beheshti A, Mousavifard ES, Zargar B, Mayer P, Rezatofighi SE. Synthesis and dye adsorption studies of the {dibromo(1,1′-(1,2-ethanediyl)bis(3-methyl-imidazole-2-thione)dicopper( i)} n polymer and its conversion to CuO nanospheres for photocatalytic and antibacterial applications. NEW J CHEM 2020. [DOI: 10.1039/d0nj01721c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A new copper polymer was used as a dye adsorbent and CuO precursor. The CuO nanospheres showed good performances for photocatalytic and antibacterial applications.
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Affiliation(s)
- Azizolla Beheshti
- Department of Chemistry
- Faculty of Sciences
- Shahid Chamran University of Ahvaz
- Ahvaz
- Iran
| | | | - Behrooz Zargar
- Department of Chemistry
- Faculty of Sciences
- Shahid Chamran University of Ahvaz
- Ahvaz
- Iran
| | - Peter Mayer
- LMU München Department Chemie
- Butenandtstrasse
- München
- Germany
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6
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Ternary complexes containing Copper(II), -Valinate and α, ά-bipyridyl or 1,10-phenanthroline: Synthesis, characterization, ligand substitution and oxidase biomimetic catalytic activity studies. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.04.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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7
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Presti EL, Perrone ML, Santagostini L, Casella L, Monzani E. A Stereoselective Tyrosinase Model Compound Derived from an m-Xylyl-l-histidine Ligand. Inorg Chem 2019; 58:7335-7344. [PMID: 31091087 DOI: 10.1021/acs.inorgchem.9b00473] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The aim of mimicking enzyme activity represents an important motivation for the development of new catalysts. A challenging objective is the development of chiral complexes for bioinspired enantioselective oxidation reactions. Herein, we report a new chiral dinuclear copper(II) complex based on a m-xylyl-bis(histidine) ligand (mXHI) as a biomimetic catalyst for tyrosinase and catechol oxidase. The new ligand improves a previous system also containing two tridentate N3 units derived from l-histidine that were connected by a short, rigid ethanediamine bridge. In mXHI the bridge is provided by the more extended m-xylyl moiety. The dicopper(II) complex [Cu2(mXHI)]4+ was studied as a catalyst for stereoselective oxidations of enantiomeric couples of chiral catechols of biological interest (L/D-dopa, L/D-dopa methyl ester, and ( R/ S)-norepinephrine), showing excellent discrimination capability, particularly for the methyl esters of dopa enantiomers. The catechol oxidation was studied in acetate buffer as slightly acidic medium, and a role of acetate as bridging ligand between the two coppers, preorganizing the dinuclear center in a more catalytic efficient structure, could be established. The oxidation of β-naphthol and 3,5-ditertbutylphenol was studied as a model monophenolase reaction. The oxidation proceeds stoichiometrically, and the partial incorporation of 18O into β-naphthol when the reaction was performed using 18O2 suggests the existence of two competitive reaction pathways, a genuine monooxygenase mechanism and a radical pathway. However, the more challenging reaction on derivatives of l-/d-tyrosine did not lead to the desired monooxygenase product but only to products of radical oxidation. Complex [Cu2(mXHI)]4+ was also used for the catalytic sulfoxidation of thioanisole in the presence of hydroxylamine as cosubstrate, in a preliminary attempt to model the reaction of external monooxygenases. The reaction proceeds with 25 turnovers, but the enantiomeric excess of sulfoxide was modest.
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Affiliation(s)
- Eliana Lo Presti
- Dipartimento di Chimica , Università di Pavia , Via Taramelli 12 , 27100 Pavia , Italy
| | - Maria L Perrone
- Dipartimento di Chimica , Università di Pavia , Via Taramelli 12 , 27100 Pavia , Italy
| | - Laura Santagostini
- Dipartimento di Chimica , Università di Milano , Via Golgi 19 , 20133 Milano , Italy
| | - Luigi Casella
- Dipartimento di Chimica , Università di Pavia , Via Taramelli 12 , 27100 Pavia , Italy
| | - Enrico Monzani
- Dipartimento di Chimica , Università di Pavia , Via Taramelli 12 , 27100 Pavia , Italy
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8
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Beheshti A, Mousavi Fard ES, Kubicki M, Mayer P, Abrahams CT, Razatofighi SE. Design, synthesis and characterization of copper-based coordination compounds with bidentate (N,N and N,O) ligands: reversible uptake of iodine, dye adsorption and assessment of their antibacterial properties. CrystEngComm 2019. [DOI: 10.1039/c8ce01348a] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This work presents the synthesis of close-packed copper complexes with an uncommon ability for dye and iodine adsorption and antibacterial activities.
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Affiliation(s)
- Azizolla Beheshti
- Department of Chemistry
- Faculty of Sciences
- Shahid Chamran University of Ahvaz
- Ahvaz
- Iran
| | | | - Maciej Kubicki
- Faculty of Chemistry
- Adam Mickiewicz University
- 60-780 Poznań
- Poland
| | - Peter Mayer
- LMU München Department Chemie
- 5-13 (D) 81377 München
- Germany
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9
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Engelmann X, Farquhar ER, England J, Ray K. Four-electron reduction of dioxygen to water by a trinuclear copper complex. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.11.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Presti EL, Monzani E, Santagostini L, Casella L. Building biomimetic model compounds of dinuclear and trinuclear copper clusters for stereoselective oxidations. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.09.045] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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Mondal D, Kundu S, Majee MC, Rana A, Endo A, Chaudhury M. Ligand-Induced Tuning of the Oxidase Activity of μ-Hydroxidodimanganese(III) Complexes Using 3,5-Di-tert-butylcatechol as the Substrate: Isolation and Characterization of Products Involving an Oxidized Dioxolene Moiety. Inorg Chem 2017; 56:9448-9460. [DOI: 10.1021/acs.inorgchem.7b00147] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Dhrubajyoti Mondal
- Department of Inorganic
Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
| | - Sanchita Kundu
- Department of Inorganic
Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
| | - Mithun Chandra Majee
- Department of Inorganic
Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
| | - Atanu Rana
- Department of Inorganic
Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
| | - Akira Endo
- Department
of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, 7-1 Kioi-cho, Chiyoda-ku, Tokyo 102-8554, Japan
| | - Muktimoy Chaudhury
- Department of Inorganic
Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
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12
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Hamann JN, Herzigkeit B, Jurgeleit R, Tuczek F. Small-molecule models of tyrosinase: From ligand hydroxylation to catalytic monooxygenation of external substrates. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2016.07.009] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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13
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Wang VCC, Maji S, Chen PPY, Lee HK, Yu SSF, Chan SI. Alkane Oxidation: Methane Monooxygenases, Related Enzymes, and Their Biomimetics. Chem Rev 2017; 117:8574-8621. [PMID: 28206744 DOI: 10.1021/acs.chemrev.6b00624] [Citation(s) in RCA: 249] [Impact Index Per Article: 35.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Methane monooxygenases (MMOs) mediate the facile conversion of methane into methanol in methanotrophic bacteria with high efficiency under ambient conditions. Because the selective oxidation of methane is extremely challenging, there is considerable interest in understanding how these enzymes carry out this difficult chemistry. The impetus of these efforts is to learn from the microbes to develop a biomimetic catalyst to accomplish the same chemical transformation. Here, we review the progress made over the past two to three decades toward delineating the structures and functions of the catalytic sites in two MMOs: soluble methane monooxygenase (sMMO) and particulate methane monooxygenase (pMMO). sMMO is a water-soluble three-component protein complex consisting of a hydroxylase with a nonheme diiron catalytic site; pMMO is a membrane-bound metalloenzyme with a unique tricopper cluster as the site of hydroxylation. The metal cluster in each of these MMOs harnesses O2 to functionalize the C-H bond using different chemistry. We highlight some of the common basic principles that they share. Finally, the development of functional models of the catalytic sites of MMOs is described. These efforts have culminated in the first successful biomimetic catalyst capable of efficient methane oxidation without overoxidation at room temperature.
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Affiliation(s)
- Vincent C-C Wang
- Institute of Chemistry, Academia Sinica , 128, Section 2, Academia Road, Nankang, Taipei 11529, Taiwan
| | - Suman Maji
- School of Chemical Engineering and Physical Sciences, Lovely Professional University , Jalandhar-Delhi G. T. Road (NH-1), Phagwara, Punjab India 144411
| | - Peter P-Y Chen
- Department of Chemistry, National Chung Hsing University , 250 Kuo Kuang Road, Taichung 402, Taiwan
| | - Hung Kay Lee
- Department of Chemistry, The Chinese University of Hong Kong , Shatin, New Territories, Hong Kong
| | - Steve S-F Yu
- Institute of Chemistry, Academia Sinica , 128, Section 2, Academia Road, Nankang, Taipei 11529, Taiwan
| | - Sunney I Chan
- Institute of Chemistry, Academia Sinica , 128, Section 2, Academia Road, Nankang, Taipei 11529, Taiwan.,Department of Chemistry, National Taiwan University , No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan.,Noyes Laboratory, 127-72, California Institute of Technology , 1200 East California Boulevard, Pasadena, California 91125, United States
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14
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Perrone ML, Salvadeo E, Lo Presti E, Pasotti L, Monzani E, Santagostini L, Casella L. A dinuclear biomimetic Cu complex derived from l-histidine: synthesis and stereoselective oxidations. Dalton Trans 2017; 46:4018-4029. [DOI: 10.1039/c7dt00147a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new dicopper(ii) complex with a histidine-derived N6 ligand performs a biomimetic stereoselective oxidation of catechols.
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Affiliation(s)
| | - Elena Salvadeo
- Dipartimento di Chimica
- Università di Pavia
- 27100 Pavia
- Italy
| | | | - Luca Pasotti
- Dipartimento di Chimica
- Università di Pavia
- 27100 Pavia
- Italy
- Noxamet Srl
| | - Enrico Monzani
- Dipartimento di Chimica
- Università di Pavia
- 27100 Pavia
- Italy
| | | | - Luigi Casella
- Dipartimento di Chimica
- Università di Pavia
- 27100 Pavia
- Italy
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15
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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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16
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Ottenbacher RV, Talsi EP, Bryliakov KP. Direct Selective Oxidative Functionalization of C-H Bonds with H₂O₂: Mn-Aminopyridine Complexes Challenge the Dominance of Non-Heme Fe Catalysts. Molecules 2016; 21:molecules21111454. [PMID: 27809257 PMCID: PMC6273867 DOI: 10.3390/molecules21111454] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 10/20/2016] [Accepted: 10/20/2016] [Indexed: 11/28/2022] Open
Abstract
Non-heme iron(II) complexes are widespread synthetic enzyme models, capable of conducting selective C–H oxidation with H2O2 in the presence of carboxylic acid additives. In the last years, structurally similar manganese(II) complexes have been shown to catalyze C–H oxidation with similarly high selectivity, and with much higher efficiency. In this mini-review, recent catalytic and mechanistic data on the selective C–H oxygenations with H2O2 in the presence of manganese complexes are overviewed. A distinctive feature of catalyst systems of the type Mn complex/H2O2/carboxylic is the existence of two alternative reaction pathways (as found for the oxidation of cumenes), one leading to the formation of alcohol, and the other to ester. The mechanisms of formation of the alcohol and the ester are briefly discussed.
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Affiliation(s)
- Roman V Ottenbacher
- Chemistry Department, Novosibirsk State University, Pirogova 2, Novosibirsk 630090, Russia.
- Boreskov Institute of Catalysis, Pr. Lavrentieva 5, Novosibirsk 630090, Russia.
| | - Evgenii P Talsi
- Chemistry Department, Novosibirsk State University, Pirogova 2, Novosibirsk 630090, Russia.
- Boreskov Institute of Catalysis, Pr. Lavrentieva 5, Novosibirsk 630090, Russia.
| | - Konstantin P Bryliakov
- Chemistry Department, Novosibirsk State University, Pirogova 2, Novosibirsk 630090, Russia.
- Boreskov Institute of Catalysis, Pr. Lavrentieva 5, Novosibirsk 630090, Russia.
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17
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Pirota V, Dell'Acqua S, Monzani E, Nicolis S, Casella L. Copper-Aβ Peptides and Oxidation of Catecholic Substrates: Reactivity and Endogenous Peptide Damage. Chemistry 2016; 22:16964-16973. [PMID: 27735097 DOI: 10.1002/chem.201603824] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Indexed: 11/08/2022]
Abstract
The oxidative reactivity of copper complexes with Aβ peptides 1-16 and 1-28 (Aβ16 and Aβ28) against dopamine and related catechols under physiological conditions has been investigated in parallel with the competitive oxidative modification undergone by the peptides. It was found that both Aβ16 and Aβ28 markedly increase the oxidative reactivity of copper(II) towards the catechol compounds, up to a molar ratio of about 4:1 of peptide/copper(II). Copper redox cycling during the catalytic activity induces the competitive modification of the peptide at selected amino acid residues. The main modifications consist of oxidation of His13/14 to 2-oxohistidine and Phe19/20 to ortho-tyrosine, and the formation of a covalent His6-catechol adduct. Competition by the endogenous peptide is rather efficient, as approximately one peptide molecule is oxidized every 10 molecules of 4-methylcatechol.
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Affiliation(s)
- Valentina Pirota
- Dipartimento di Chimica, Università di Pavia, Via Taramelli 12, 27100, Pavia, Italy
| | - Simone Dell'Acqua
- Dipartimento di Chimica, Università di Pavia, Via Taramelli 12, 27100, Pavia, Italy
| | - Enrico Monzani
- Dipartimento di Chimica, Università di Pavia, Via Taramelli 12, 27100, Pavia, Italy
| | - Stefania Nicolis
- Dipartimento di Chimica, Università di Pavia, Via Taramelli 12, 27100, Pavia, Italy
| | - Luigi Casella
- Dipartimento di Chimica, Università di Pavia, Via Taramelli 12, 27100, Pavia, Italy
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18
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Coordination and redox properties of copper interaction with α-synuclein. J Inorg Biochem 2016; 163:292-300. [DOI: 10.1016/j.jinorgbio.2016.04.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 03/11/2016] [Accepted: 04/04/2016] [Indexed: 11/23/2022]
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19
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Dell'Acqua S, Pirota V, Anzani C, Rocco MM, Nicolis S, Valensin D, Monzani E, Casella L. Reactivity of copper-α-synuclein peptide complexes relevant to Parkinson's disease. Metallomics 2016; 7:1091-102. [PMID: 25865825 DOI: 10.1039/c4mt00345d] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Parkinson's disease (PD) is a neurodegenerative disorder characterized by the presence of abnormal α-synuclein (αSyn) deposits in the brain. Alterations in metal homeostasis and metal-induced oxidative stress may play a crucial role in the aggregation of αSyn and, consequently, in the pathogenesis of PD. We have therefore investigated the capability of copper-αSyn6 and copper-αSyn15 peptide complexes, with the 1-6 and 1-15 terminal fragments of the protein, to promote redox reactions that can be harmful to other cellular components. The pseudo-tyrosinase activity of copper-αSyn complexes against catecholic (di-tert-butylcatechol (DTBCH2), 4-methylcatechol (4-MC)) and phenolic (phenol) substrates is lower compared to that of free copper(II). In particular, the rates (kcat) of DTBCH2 catalytic oxidation are 0.030 s(-1) and 0.009 s(-1) for the reaction promoted by free copper(II) and [Cu(2+)-αSyn15], respectively. On the other hand, HPLC/ESI-MS analysis of solutions of αSyn15 incubated with copper(II) and 4-MC showed that αSyn is competitively oxidized with remarkable formation of sulfoxide at Met1 and Met5 residues. Moreover, the sulfoxidation of methionine residues, which is related to the aggregation of αSyn, also occurs on peptides not directly bound to copper, indicating that external αSyn can also be oxidized by copper. Therefore, this study strengthens the hypothesis that copper plays an important role in oxidative damage of αSyn which is proposed to be strongly related to the etiology of PD.
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Affiliation(s)
- Simone Dell'Acqua
- Dipartimento di Chimica, Università di Pavia, Via Taramelli 12, 27100 Pavia, Italy.
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20
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Beyeh NK, Puttreddy R. Methylresorcinarene: a reaction vessel to control the coordination geometry of copper(II) in pyridine N-oxide copper(II) complexes. Dalton Trans 2015; 44:9881-6. [PMID: 25939967 DOI: 10.1039/c5dt01143d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Pyridine and 2-picolinic acid N-oxides form 2 : 2 and 2 : 1 ligand : metal (L : M) discrete L2M2 and polymeric complexes with CuCl2 and Cu(NO3)2, respectively, with copper(ii) salts. The N-oxides also form 1 : 1 host-guest complexes with methylresorcinarene. In combination, the three components form a unique 2 : 2 : 1 host-ligand-metal complex. The methylresorcinarene acts as a reaction vessel/protecting group to control the coordination of copper(ii) from cis-see-saw to trans-square planar, and from octahedral to square planar coordination geometry. These processes were studied in solution and in the solid state via(1)H NMR spectroscopy and single crystal X-ray diffraction.
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Affiliation(s)
- Ngong Kodiah Beyeh
- University of Jyvaskyla, Department of Chemistry, P. O. Box 35, 40014 University of Jyvaskyla, Jyvaskyla, Finland.
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21
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Kakuda S, Rolle C, Ohkubo K, Siegler MA, Karlin KD, Fukuzumi S. Lewis acid-induced change from four- to two-electron reduction of dioxygen catalyzed by copper complexes using scandium triflate. J Am Chem Soc 2015; 137:3330-7. [PMID: 25659416 PMCID: PMC4630010 DOI: 10.1021/ja512584r] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Mononuclear copper complexes, [(tmpa)Cu(II)(CH3CN)](ClO4)2 (1, tmpa = tris(2-pyridylmethyl)amine) and [(BzQ)Cu(II)(H2O)2](ClO4)2 (2, BzQ = bis(2-quinolinylmethyl)benzylamine)], act as efficient catalysts for the selective two-electron reduction of O2 by ferrocene derivatives in the presence of scandium triflate (Sc(OTf)3) in acetone, whereas 1 catalyzes the four-electron reduction of O2 by the same reductant in the presence of Brønsted acids such as triflic acid. Following formation of the peroxo-bridged dicopper(II) complex [(tmpa)Cu(II)(O2)Cu(II)(tmpa)](2+), the two-electron reduced product of O2 with Sc(3+) is observed to be scandium peroxide ([Sc(III)(O2(2-))](+)). In the presence of 3 equiv of hexamethylphosphoric triamide (HMPA), [Sc(III)(O2(2-))](+) was oxidized by [Fe(bpy)3](3+) (bpy = 2,2-bipyridine) to the known superoxide species [(HMPA)3Sc(III)(O2(•-))](2+) as detected by EPR spectroscopy. A kinetic study revealed that the rate-determining step of the catalytic cycle for the two-electron reduction of O2 with 1 is electron transfer from Fc* to 1 to give a cuprous complex which is highly reactive toward O2, whereas the rate-determining step with 2 is changed to the reaction of the cuprous complex with O2 following electron transfer from ferrocene derivatives to 2. The explanation for the change in catalytic O2-reaction stoichiometry from four-electron with Brønsted acids to two-electron reduction in the presence of Sc(3+) and also for the change in the rate-determining step is clarified based on a kinetics interrogation of the overall catalytic cycle as well as each step of the catalytic cycle with study of the observed effects of Sc(3+) on copper-oxygen intermediates.
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Affiliation(s)
- Saya Kakuda
- Department of Material and Life Science, Division of Advanced Science and Biotechnology, Graduate School of Engineering, ALCA (JST), Osaka University, Suita, Osaka 565-0871, Japan
| | - Clarence Rolle
- Department of Chemistry, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Kei Ohkubo
- Department of Material and Life Science, Division of Advanced Science and Biotechnology, Graduate School of Engineering, ALCA (JST), Osaka University, Suita, Osaka 565-0871, Japan
| | - Maxime A. Siegler
- Department of Chemistry, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Kenneth D. Karlin
- Department of Chemistry, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Shunichi Fukuzumi
- Department of Material and Life Science, Division of Advanced Science and Biotechnology, Graduate School of Engineering, ALCA (JST), Osaka University, Suita, Osaka 565-0871, Japan
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22
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Perrone ML, Lo Presti E, Dell'Acqua S, Monzani E, Santagostini L, Casella L. Synthesis, Characterization, and Stereoselective Oxidations of the Dinuclear Copper(II) Complex Derived from a Chiral Diamino-m-xylenetetra(benzimidazole) Ligand. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500046] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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23
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Reger DL, Pascui AE, Pellechia PJ, Ozarowski A. NMR Investigations of Dinuclear, Single-Anion Bridged Copper(II) Metallacycles: Structure and Antiferromagnetic Behavior in Solution. Inorg Chem 2013; 52:12741-8. [DOI: 10.1021/ic402016m] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Daniel L. Reger
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Andrea E. Pascui
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Perry J. Pellechia
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Andrew Ozarowski
- National
High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, United States
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24
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Mishra AK, Prajapati RK, Verma S. Adenine supported hydroxyl-bridged dicopper core as a catalytically competent unit for phenol oxidation. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.05.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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25
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Liu YF, Yu JG, Siegbahn PEM, Blomberg MRA. Theoretical Study of the Oxidation of Phenolates by the [Cu2O2(N,N′-di-tert-butylethylenediamine)2]2+Complex. Chemistry 2013; 19:1942-54. [DOI: 10.1002/chem.201203052] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Indexed: 01/06/2023]
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26
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Ciregna D, Monzani E, Thiabaud G, Pizzocaro S, Casella L. Copper–β-amyloid peptides exhibit neither monooxygenase nor superoxide dismutase activities. Chem Commun (Camb) 2013; 49:4027-9. [DOI: 10.1039/c3cc41297k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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27
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Martínez A, Membrillo I, Ugalde-Saldívar VM, Gasque L. Dinuclear Copper Complexes with Imidazole Derivative Ligands: A Theoretical Study Related to Catechol Oxidase Activity. J Phys Chem B 2012; 116:8038-44. [DOI: 10.1021/jp300444m] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Ana Martínez
- Instituto de Investigaciones
en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior S. N., Ciudad Universitaria
CP 04510, México D.F. México
| | - Ingrid Membrillo
- Departamento de Química
Inorgánica, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria
04510, México DF, México
| | - Victor M. Ugalde-Saldívar
- Departamento de Química
Inorgánica, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria
04510, México DF, México
| | - Laura Gasque
- Departamento de Química
Inorgánica, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria
04510, México DF, México
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28
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Garcia-Bosch I, Ribas X, Costas M. Electrophilic arene hydroxylation and phenol O-H oxidations performed by an unsymmetric μ-η(1):η(1)-O2-peroxo dicopper(II) complex. Chemistry 2012; 18:2113-22. [PMID: 22250002 DOI: 10.1002/chem.201102372] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Indexed: 11/09/2022]
Abstract
Reactions of the unsymmetric dicopper(II) peroxide complex [Cu(II)(2)(μ-η(1):η(1)-O(2))(m-XYL(N3N4))](2+) (1 O(2), where m-XYL is a heptadentate N-based ligand), with phenolates and phenols are described. Complex 1 O(2) reacts with p-X-PhONa (X = MeO, Cl, H, or Me) at -90 °C performing tyrosinase-like ortho-hydroxylation of the aromatic ring to afford the corresponding catechol products. Mechanistic studies demonstrate that reactions occur through initial reversible formation of metastable association complexes [Cu(II)(2)(μ-η(1):η(1)-O(2))(p-X-PhO)(m-XYL(N3N4))](+) (1 O(2)⋅X-PhO) that then undergo ortho-hydroxylation of the aromatic ring by the peroxide moiety. Complex 1 O(2) also reacts with 4-X-substituted phenols p-X-PhOH (X = MeO, Me, F, H, or Cl) and with 2,4-di-tert-butylphenol at -90 °C causing rapid decay of 1 O(2) and affording biphenol coupling products, which is indicative that reactions occur through formation of phenoxyl radicals that then undergo radical C-C coupling. Spectroscopic UV/Vis monitoring and kinetic analysis show that reactions take place through reversible formation of ground-state association complexes [Cu(II)(2)(μ-η(1):η(1)-O(2))(X-PhOH)(m-XYL(N3N4))](2+) (1 O(2)⋅X-PhOH) that then evolve through an irreversible rate-determining step. Mechanistic studies indicate that 1 O(2) reacts with phenols through initial phenol binding to the Cu(2)O(2) core, followed by a proton-coupled electron transfer (PCET) at the rate-determining step. Results disclosed in this work provide experimental evidence that the unsymmetric 1 O(2) complex can mediate electrophilic arene hydroxylation and PCET reactions commonly associated with electrophilic Cu(2)O(2) cores, and strongly suggest that the ability to form substrate⋅Cu(2)O(2) association complexes may provide paths to overcome the inherent reactivity of the O(2)-binding mode. This work provides experimental evidence that the presence of a H(+) completely determines the fate of the association complex [Cu(II)(2)(μ-η(1):η(1)-O(2))(X-PhO(H))(m-XYL(N3N4))](n+) between a PCET and an arene hydroxylation reaction, and may provide clues to help understand enzymatic reactions at dicopper sites.
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Affiliation(s)
- Isaac Garcia-Bosch
- QBIS Group, Departament de Química, Universitat de Girona, Campus de Montilivi, 17071 Girona, Catalonia, Spain
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29
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Garcia‐Bosch I, Ribas X, Costas M. Well‐Defined Heterometallic and Unsymmetric M
2
O
2
Complexes Arising from Binding and Activation of O
2. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100957] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Isaac Garcia‐Bosch
- QBIS Research Group, Departament de Química, Universitat de Girona, Facultat de Ciències, Campus de Montilivi, 17071 Girona, Spain, Fax: +34‐972‐418150
| | - Xavi Ribas
- QBIS Research Group, Departament de Química, Universitat de Girona, Facultat de Ciències, Campus de Montilivi, 17071 Girona, Spain, Fax: +34‐972‐418150
| | - Miquel Costas
- QBIS Research Group, Departament de Química, Universitat de Girona, Facultat de Ciències, Campus de Montilivi, 17071 Girona, Spain, Fax: +34‐972‐418150
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30
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Synthesis, crystal structure and charge transfer spectra of dinuclear copper(I) complexes bearing 1,2-bis(arylimino)acenaphthene acceptor ligands. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.02.042] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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31
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An artificial enzyme-based assay: DNA detection using a peroxidase-like copper–creatinine complex. Biosens Bioelectron 2011; 26:4798-803. [DOI: 10.1016/j.bios.2011.06.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2011] [Revised: 05/29/2011] [Accepted: 06/10/2011] [Indexed: 11/19/2022]
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32
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Martínez-Calvo M, Vázquez López M, Pedrido R, González-Noya AM, Bermejo MR, Monzani E, Casella L, Sorace L. Endogenous arene hydroxylation promoted by copper(I) cluster helicates. Chemistry 2011; 16:14175-80. [PMID: 20967897 DOI: 10.1002/chem.201001285] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A novel neutral triple-stranded hexanuclear copper(I) cluster helicate [Cu(I)(6)L(3)]·2CH(3)CN derived from a thiosemicarbazone ligand could be synthesized and crystallographically characterized. The MALDI mass spectrum of this complex suggests that the tetranuclear copper(I) cluster helicate [Cu(I)(4)L(2)] is also present in solution. These copper(I) cluster helicates are capable, in the presence of O(2), of hydroxylating the arene linker of their supporting ligand strands. The resulting dinuclear complex [Cu(II)(2)L'(OH)] is formed by two copper(II) centers, a new ligand arising from the hydroxylation reaction, and one hydroxide group. The magnetic investigation of this compound shows a strong antiferromagnetic coupling between the two Cu(II) centers. The kinetic studies for the hydroxylation process show values of ΔH(≠)=-70 kJ mol(-1), similar to those mediated by the tyrosinase enzymes.
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Affiliation(s)
- Miguel Martínez-Calvo
- Departamento de Química Inorgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
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33
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Mutti FG, Gullotti M, Casella L, Santagostini L, Pagliarin R, Andersson KK, Iozzi MF, Zoppellaro G. A new chiral, poly-imidazole N8-ligand and the related di- and tri-copper(ii) complexes: synthesis, theoretical modelling, spectroscopic properties, and biomimetic stereoselective oxidations. Dalton Trans 2011; 40:5436-57. [DOI: 10.1039/c0dt00669f] [Citation(s) in RCA: 23] [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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34
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Rolff M, Schottenheim J, Decker H, Tuczek F. Copper–O2 reactivity of tyrosinase models towards external monophenolic substrates: molecular mechanism and comparison with the enzyme. Chem Soc Rev 2011; 40:4077-98. [DOI: 10.1039/c0cs00202j] [Citation(s) in RCA: 359] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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35
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Hong S, Gupta AK, Tolman WB. Intermediates in reactions of copper(I) complexes with N-oxides: from the formation of stable adducts to oxo transfer. Inorg Chem 2010; 48:6323-5. [PMID: 19425587 DOI: 10.1021/ic900435p] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Reactions of copper(I) complexes of bidentate N-donor supporting ligands with pyridine- and trimethylamine-N-oxides or PhIO were explored. Key results include the identification of novel copper(I) N-oxide adducts, aryl substituent hydroxylation, and bis(mu-oxo)dicopper complex formation via a route involving oxo transfer.
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Affiliation(s)
- Sungjun Hong
- Department of Chemistry and Center for Metals in Biocatalysis, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, USA
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36
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37
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Rolff M, Schottenheim J, Peters G, Tuczek F. Das erste katalytische Tyrosinasemodell basierend auf einem einkernigen Kupfer(I)-Komplex: Kinetik und Mechanismus. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201000973] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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38
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Rolff M, Schottenheim J, Peters G, Tuczek F. The First Catalytic Tyrosinase Model System Based on a Mononuclear Copper(I) Complex: Kinetics and Mechanism. Angew Chem Int Ed Engl 2010; 49:6438-42. [DOI: 10.1002/anie.201000973] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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39
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Rolff M, Schottenheim J, Tuczek F. Monooxygenation of external phenolic substrates in small-molecule dicopper complexes: implications on the reaction mechanism of tyrosinase. J COORD CHEM 2010. [DOI: 10.1080/00958972.2010.503273] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Malte Rolff
- a Institut für Anorganische Chemie, Christian Albrechts Universität Kiel , Max-Eyth-Straße 2, D-24118 Kiel, Germany
| | - Julia Schottenheim
- a Institut für Anorganische Chemie, Christian Albrechts Universität Kiel , Max-Eyth-Straße 2, D-24118 Kiel, Germany
| | - Felix Tuczek
- a Institut für Anorganische Chemie, Christian Albrechts Universität Kiel , Max-Eyth-Straße 2, D-24118 Kiel, Germany
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40
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Garcia-Bosch I, Company A, Frisch JR, Torrent-Sucarrat M, Cardellach M, Gamba I, Güell M, Casella L, Que L, Ribas X, Luis JM, Costas M. O2 activation and selective phenolate ortho hydroxylation by an unsymmetric dicopper mu-eta1:eta1-peroxido complex. Angew Chem Int Ed Engl 2010; 49:2406-9. [PMID: 20191646 DOI: 10.1002/anie.200906749] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Isaac Garcia-Bosch
- Departament de Química, Universitat de Girona, Campus de Montilivi, 17071 Girona, Catalonia, Spain
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41
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Garcia-Bosch I, Company A, Frisch J, Torrent-Sucarrat M, Cardellach M, Gamba I, Güell M, Casella L, Que L, Ribas X, Luis J, Costas M. O2 Activation and Selective Phenolate ortho Hydroxylation by an Unsymmetric Dicopper μ-η1:η1-Peroxido Complex. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200906749] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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42
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Lipton AS, Heck RW, de Jong WA, Gao AR, Wu X, Roehrich A, Harbison GS, Ellis PD. Low temperature 65Cu NMR spectroscopy of the Cu+ site in azurin. J Am Chem Soc 2009; 131:13992-9. [PMID: 19746904 DOI: 10.1021/ja901308v] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
(65)Cu central-transition NMR spectroscopy of the blue copper protein azurin in the reduced Cu(I) state, conducted at 18.8 T and 10 K, gave a strongly second order quadrupole perturbed spectrum, which yielded a (65)Cu quadrupole coupling constant of +/-71.2 +/- 1 MHz, corresponding to an electric field gradient of +/-1.49 atomic units at the copper site, and an asymmetry parameter of approximately 0.2. Quantum chemical calculations employing second order Møller-Plesset perturbation theory and large basis sets successfully reproduced these experimental results. Sensitivity and relaxation times were quite favorable, suggesting that NMR may be a useful probe of the electronic state of copper sites in proteins.
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Affiliation(s)
- Andrew S Lipton
- Biological Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington 99352, USA
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43
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Gamba I, Palavicini S, Monzani E, Casella L. Catalytic Sulfoxidation by Dinuclear Copper Complexes. Chemistry 2009; 15:12932-6. [DOI: 10.1002/chem.200902451] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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44
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Ambrosi G, Formica M, Fusi V, Giorgi L, Macedi E, Micheloni M, Paoli P, Rossi P. Polynuclear Complexes: Two Amino−Phenol Macrocycles Spaced by Several Linear Polyamines; Synthesis, Binding Properties, and Crystal Structure. Inorg Chem 2009; 48:10424-34. [DOI: 10.1021/ic901459b] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gianluca Ambrosi
- Institute of Chemical Sciences, University of Urbino, P.zza Rinascimento 6, I-61029 Urbino, Italy
| | - Mauro Formica
- Institute of Chemical Sciences, University of Urbino, P.zza Rinascimento 6, I-61029 Urbino, Italy
| | - Vieri Fusi
- Institute of Chemical Sciences, University of Urbino, P.zza Rinascimento 6, I-61029 Urbino, Italy
| | - Luca Giorgi
- Institute of Chemical Sciences, University of Urbino, P.zza Rinascimento 6, I-61029 Urbino, Italy
| | - Eleonora Macedi
- Institute of Chemical Sciences, University of Urbino, P.zza Rinascimento 6, I-61029 Urbino, Italy
| | - Mauro Micheloni
- Institute of Chemical Sciences, University of Urbino, P.zza Rinascimento 6, I-61029 Urbino, Italy
| | - Paola Paoli
- ‘Sergio Stecco’ Department of Energy Engineering, University of Florence, Via S. Marta 3, I-50139 Florence, Italy
| | - Patrizia Rossi
- ‘Sergio Stecco’ Department of Energy Engineering, University of Florence, Via S. Marta 3, I-50139 Florence, Italy
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45
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Hong S, Hill LMR, Gupta AK, Naab BD, Gilroy JB, Hicks RG, Cramer CJ, Tolman WB. Effects of electron-deficient beta-diketiminate and formazan supporting ligands on copper(I)-mediated dioxygen activation. Inorg Chem 2009; 48:4514-23. [PMID: 19425614 DOI: 10.1021/ic9002466] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Copper(I) complexes of a diketiminate featuring CF(3) groups on the backbone and dimethylphenyl substituents (4) and a nitroformazan (5) were synthesized and shown by spectroscopy, X-ray crystallography, cyclic voltammetry, and theory to contain copper(I) sites electron-deficient relative to those supported by previously studied diketiminate complexes comprising alkyl or aryl backbone substituents. Despite their electron-poor nature, oxygenation of LCu(CH(3)CN) (L = 4 or 5) at room temperature yielded bis(hydroxo)dicopper(II) compounds and at -80 degrees C yielded bis(mu-oxo)dicopper complexes that were identified on the basis of UV-vis and resonance Raman spectroscopy, spectrophotometric titration results (2:1 Cu/O(2) ratio), electron paramagnetic resonance spectroscopy (silent), and density functional theory calculations. The bis(mu-oxo)dicopper complex supported by 5 exhibited unusual spectroscopic properties and decayed via a novel intermediate proposed to be a metallaverdazyl radical complex, findings that highlight the potential for the formazan ligand to exhibit "noninnocent" behavior.
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Affiliation(s)
- Sungjun Hong
- Department of Chemistry, Center for Metals in Biocatalysis, and Supercomputing Institute, University of Minnesota, 207 Pleasant St. SE, Minneapolis, Minnesota 55455, USA
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46
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Mutti FG, Zoppellaro G, Gullotti M, Santagostini L, Pagliarin R, Andersson KK, Casella L. Biomimetic Modelling of Copper Enzymes: Synthesis, Characterization, EPR Analysis and Enantioselective Catalytic Oxidations by a New Chiral Trinuclear Copper(II) Complex. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200800899] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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47
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48
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Latifi R, Bagherzadeh M, Milne BF, Jaspars M, de Visser SP. Density functional theory studies of oxygen and carbonate binding to a dicopper patellamide complex. J Inorg Biochem 2008; 102:2171-8. [PMID: 18930320 DOI: 10.1016/j.jinorgbio.2008.08.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2008] [Revised: 08/20/2008] [Accepted: 08/22/2008] [Indexed: 11/16/2022]
Abstract
In this work we present results of density functional theory (DFT) calculations on dicopper patellamides and their affinity for molecular oxygen and carbonate. Patellamides are cyclic octapeptides that are produced by a cyanobacterium, and may show promise as therapeutics. Thus, carbonate binding to a dicopper patellamide center gives a stable cyclic octapeptide with a twist of almost 90 degrees . The system exists in close-lying open-shell singlet and triplet spin states with two unpaired electrons in orthogonal sigma* orbitals on each metal center. Subsequently, we replaced carbonate with dioxygen and found a stable Cu2(mu-O)2 diamond shaped patellamide core. In this structure the original dioxygen bond is significantly weakened to essentially a single bond, which should enable the system to transfer these oxygen atoms to substrates. We predicted the IR and Raman spectra of the Cu2(mu-O)2 diamond shaped patellamide structure using density functional theory and found a considerable isotope effect on the O-O stretch vibration for 16O2 versus 18O2 bound structures. Our studies reveal that carbonate forms an extremely stable complex with dicopper patellamide, but that additional molecular oxygen to this system does not give a potential oxidant. Therefore, it is more likely that carbonate prepares the system for dioxygen binding by folding it into the correct configuration followed in the proposed catalytic cycle by a protonation event preceding dioxygen binding to enable the system to reorganize to form a stable Cu2(mu-O)2-patellamide cluster. Alternatively, carbonate may act as an inhibitor that blocks the catalytic activity of the system. It is anticipated that the Cu2(mu-O)2-patellamide structure is a potential active oxidant of the dicopper patellamide complex.
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Affiliation(s)
- Reza Latifi
- Manchester Interdisciplinary Biocenter and School of Chemical Engineering and Analytical Science, University of Manchester, 131 Princess Street, Manchester M1 7DN, United Kingdom
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Company A, Palavicini S, Garcia-Bosch I, Mas-Ballesté R, Que L, Rybak-Akimova E, Casella L, Ribas X, Costas M. Tyrosinase-Like Reactivity in a CuIII2(μ-O)2 Species. Chemistry 2008; 14:3535-8. [DOI: 10.1002/chem.200800229] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Gullotti M, Santagostini L, Pagliarin R, Palavicini S, Casella L, Monzani E, Zoppellaro G. Ligand Binding, Conformational and Spectroscopic Properties, and Biomimetic Monooxygenase Activity by the Trinuclear Copper–PHI Complex Derived fromL-Histidine. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200701266] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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