1
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Wu H, Xu S, Du P, Liu Y, Li H, Yang H, Wang T, Wang ZG. A nucleotide-copper(II) complex possessing a monooxygenase-like catalytic function. J Mater Chem B 2023. [PMID: 37409588 DOI: 10.1039/d3tb00780d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/07/2023]
Abstract
The de novo design of artificial biocatalysts with enzyme-like active sites and catalytic functions has long been an attractive yet challenging goal. In this study, we present a nucleotide-Cu2+ complex, synthesized through a one-pot approach, capable of catalyzing ortho-hydroxylation reactions resembling those of minimalist monooxygenases. Both experimental and theoretical findings demonstrate that the catalyst, in which Cu2+ coordinates with both the nucleobase and phosphate moieties, forms a ternary-complex intermediate with H2O2 and tyramine substrates through multiple weak interactions. The subsequent electron transfer and hydrogen (or proton) transfer steps lead to the ortho-hydroxylation of tyramine, where the single copper center exhibits a similar function to natural dicopper sites. Moreover, Cu2+ bound to nucleotides or oligonucleotides exhibits thermophilic catalytic properties within the temperature range of 25 °C to 75 °C, while native enzymes are fully deactivated above 35 °C. This study may provide insights for the future design of oxidase-mimetic catalysts and serve as a guide for the design of primitive metallocentre-dependent enzymes.
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Affiliation(s)
- Haifeng Wu
- State Key Laboratory of Organic-Inorganic Composites, Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology, Ministry of Education), Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
| | - Shichao Xu
- State Key Laboratory of Organic-Inorganic Composites, Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology, Ministry of Education), Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
| | - Peidong Du
- State Key Laboratory of Organic-Inorganic Composites, Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology, Ministry of Education), Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
| | - Yuanxi Liu
- State Key Laboratory of Organic-Inorganic Composites, Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology, Ministry of Education), Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
| | - Hui Li
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
| | - Haijun Yang
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Ting Wang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Zhen-Gang Wang
- State Key Laboratory of Organic-Inorganic Composites, Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology, Ministry of Education), Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
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2
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Suktanarak P, Leeladee P, Tuntulani T. Oxidative ligand cleavage in a copper(
II
) complex containing aniline moiety induced by copper(
II
) perchlorate in acetonitrile. B KOREAN CHEM SOC 2022. [DOI: 10.1002/bkcs.12522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Pattira Suktanarak
- Faculty of Sport and Health Sciences Thailand National Sports University Lampang Campus Lampang Thailand
| | - Pannee Leeladee
- Department of Chemistry Faculty of Science, Chulalongkorn University Bangkok Thailand
| | - Thawatchai Tuntulani
- Department of Chemistry Faculty of Science, Chulalongkorn University Bangkok Thailand
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3
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Theoretical perspective on mononuclear copper-oxygen mediated C–H and O–H activations: A comparison between biological and synthetic systems. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(21)63974-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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4
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Ghosh I, Chakraborty B, Bera A, Paul S, Paine TK. Selective oxygenation of C-H and CC bonds with H 2O 2 by high-spin cobalt(II)-carboxylate complexes. Dalton Trans 2022; 51:2480-2492. [PMID: 35050271 DOI: 10.1039/d1dt02235k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Four cobalt(II)-carboxylate complexes [(6-Me3-TPA)CoII(benzoate)](BPh4) (1), [(6-Me3-TPA)CoII(benzilate)](ClO4) (2), [(6-Me3-TPA)CoII(mandelate)](BPh4) (3), and [(6-Me3-TPA)CoII(MPA)](BPh4) (4) (HMPA = 2-methoxy-2-phenylacetic acid) of the 6-Me3-TPA (tris((6-methylpyridin-2-yl)methyl)amine) ligand were isolated to investigate their ability in H2O2-dependent selective oxygenation of C-H and CC bonds. All six-coordinate complexes contain a high-spin cobalt(II) center. While the cobalt(II) complexes are inert toward dioxygen, each of these complexes reacts readily with hydrogen peroxide to form a diamagnetic cobalt(III) species, which decays with time leading to the oxidation of the methyl groups on the pyridine rings of the supporting ligand. Intramolecular ligand oxidation by the cobalt-based oxidant is partially inhibited in the presence of external substrates, and the substrates are converted to their corresponding oxidized products. Kinetic studies and labelling experiments indicate the involvement of a metal-based oxidant in affecting the chemo- and stereo-selective catalytic oxygenation of aliphatic C-H bonds and epoxidation of alkenes. An electrophilic cobalt-oxygen species that exhibits a kinetic isotope effect (KIE) value of 5.3 in toluene oxidation by 1 is proposed as the active oxidant. Among the complexes, the cobalt(II)-benzoate (1) and cobalt(II)-MPA (4) complexes display better catalytic activity compared to their α-hydroxy analogues (2 and 3). Catalytic studies with the cobalt(II)-acetonitrile complex [(6-Me3-TPA)CoII(CH3CN)2](ClO4)2 (5) in the presence and absence of externally added benzoate support the role of the carboxylate co-ligand in oxidation reactions. The proposed catalytic reaction involves a carboxylate-bridged dicobalt complex in the activation of H2O2 followed by the oxidation of substrates by a metal-based oxidant.
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Affiliation(s)
- Ivy Ghosh
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
| | - Biswarup Chakraborty
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
| | - Abhijit Bera
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
| | - Satadal Paul
- Department of Chemistry, Bangabasi Morning College, 19, Rajkumar Chakraborty Sarani, Kolkata - 700 009, India
| | - Tapan Kanti Paine
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
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5
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Richezzi M, Ferreyra J, Puzzolo J, Milesi L, Palopoli CM, Moreno DM, Hureau C, Signorella SR. Versatile Activity of a Copper(II) Complex Bearing a N4‐Tetradentate Schiff Base Ligand with Reduced Oxygen Species. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202101042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Micaela Richezzi
- Universidad Nacional de Rosario Facultad de Ciencias Bioquimicas y Farmaceuticas Química Física ARGENTINA
| | - Joaquín Ferreyra
- Universidad Nacional de Rosario Facultad de Ciencias Bioquimicas y Farmaceuticas Química Física ARGENTINA
| | - Juan Puzzolo
- Universidad Nacional de Rosario Facultad de Ciencias Bioquimicas y Farmaceuticas Química Física ARGENTINA
| | - Lisandro Milesi
- Universidad Nacional de Rosario Facultad de Ciencias Bioquimicas y Farmaceuticas Química Física ARGENTINA
| | - Claudia M. Palopoli
- Universidad Nacional de Rosario Facultad de Ciencias Bioquimicas y Farmaceuticas Química Física ARGENTINA
| | - Diego M. Moreno
- Universidad Nacional de Rosario Facultad de Ciencias Bioquimicas y Farmaceuticas Química Física ARGENTINA
| | - Christelle Hureau
- CNRS: Centre National de la Recherche Scientifique LCC - Laboratoire de Chimie de Coordination FRANCE
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6
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Bleher K, Comba P, Gross JH, Josephy T. ESI and tandem MS for mechanistic studies with high-valent transition metal species. Dalton Trans 2022; 51:8625-8639. [DOI: 10.1039/d2dt00809b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The analysis of high-valent metal species has been in the focus of research for over 20 years. Mass spectrometry (MS) represents a technique routinely used for their characterization, in particular...
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7
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Van Trieste GP, Reibenspies JH, Chen YS, Sengupta D, Thompson RR, Powers DC. Oxygen-atom transfer photochemistry of a molecular copper bromate complex. Chem Commun (Camb) 2022; 58:12608-12611. [DOI: 10.1039/d2cc04403j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the synthesis and oxygen-atom transfer (OAT) photochemistry of [Cu(tpa)BrO3]ClO4.
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Affiliation(s)
| | | | - Yu-Sheng Chen
- ChemMatCARS, University of Chicago, Argonne, IL 60439, USA
| | - Debabrata Sengupta
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA
| | - Richard R. Thompson
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA
| | - David C. Powers
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA
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8
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Shi YS, Liu JF, Wu XL, Ke DH, Xu S. Synthesis of (E)-α-hydroxyethyl-α,β-unsaturated aldehydes by the reaction of tetrahydrofuran and aromatic aldehydes. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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9
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Cu-promoted intramolecular hydroxylation of CH bonds using directing groups with varying denticity. J Inorg Biochem 2021; 223:111557. [PMID: 34352714 DOI: 10.1016/j.jinorgbio.2021.111557] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 07/11/2021] [Accepted: 07/16/2021] [Indexed: 12/31/2022]
Abstract
In this research article, we describe the Cu-promoted intramolecular hydroxylation of sp2 and sp3 CH bonds using directing groups with varying denticity (bi-, tri- and tetradentate) and natural oxidants (O2 and H2O2). We found that bidentate directing groups, in combination with Cu and H2O2, led to high hydroxylation yields. On the other hand, tetradentate directing groups did not form the hydroxylation products. Our mechanistic investigations suggest that bidentate directing groups allow for generating reactive mononuclear copper(II) hydroperoxide intermediates while tetradentate systems form dinuclear Cu2O2 species that do not oxidize CH bonds. Our findings might shed light on the reaction mechanism(s) by which Cu-dependent metalloenzymes such as particulate methane monooxygenase or lytic polysaccharide monooxygenase oxidize strong CH bonds.
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10
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Zn and Cu complexes of o-van-gly Schiff base: Syntheses, crystal structures, fluorescence sensing and anticancer properties. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2021.120384] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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11
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Morimoto Y, Kawai M, Nakanishi A, Sugimoto H, Itoh S. Controlling the Reactivity of Copper(II) Acylperoxide Complexes. Inorg Chem 2021; 60:8554-8565. [PMID: 33848148 DOI: 10.1021/acs.inorgchem.1c00475] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The redox state of the metallomonooxygenases is finely tuned by imposing specific coordination environments on the metal center to reduce the activation energy for the generation of active-oxygen species and subsequent substrate oxygenation reactions. In this study, copper(II) complexes supported by a series of linear tetradentate ligands consisting of a rigid 6-, 7-, or 8-membered cyclic diamine with two pyridylmethyl (-CH2Py) side arms (L6Pym2, L7Pym2, and L8Pym2) are employed to examine the effects of the coordination environment on the reactivity of their acylperoxide adduct complexes. The UV-vis and electron paramagnetic resonance spectroscopic data indicate that the ligand-field splitting between the dx2-y2 and dz2 orbitals of the starting copper(II) complexes increase with an increase of the ring size of the diamine moiety (L6Pym2 → L7Pym2 → L8Pym2). In the reaction of these copper(II) complexes with m-chloroperbenzoic acid (m-CPBA), the L6Pym2 complex gives a stable m-CPBA adduct complex, whereas the L7Pym2 and L8Pym2 complexes are immediately converted to the corresponding m-chlorobenzoic acid (m-CBA) adducts, indicating that the reactivity of the copper(II) acylperoxide complexes largely depends on the coordination environment induced by the supporting ligands. Density functional theory (DFT) calculations on the m-CPBA adduct complexes show that the ligand-field-splitting energy increases with an increase of the ring size of the diamine moiety, as in the case of the starting copper(II) complexes, which enhances the reactivity of the m-CPBA adduct complexes. The reasons for such different reactivities of the m-CPBA adduct complexes are evaluated by using DFT calculations.
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Affiliation(s)
- Yuma Morimoto
- Department of Molecular Chemistry, Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Makito Kawai
- Department of Molecular Chemistry, Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Aya Nakanishi
- Department of Molecular Chemistry, Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Hideki Sugimoto
- Department of Molecular Chemistry, Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Shinobu Itoh
- Department of Molecular Chemistry, Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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12
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Role of zeolite encapsulated Cu(II) complexes in electron transfer as well as peroxy radical intermediates formation during oxidation of thioanisole. J Catal 2020. [DOI: 10.1016/j.jcat.2020.06.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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13
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Chakraborty T, Mondal R, Ghanta R, Chakraborty A, Chattopadhyay T. Triton X‐100 functionalized Cu(II) dihydrazone based complex immobilized on Fe
3
O
4
@dopa: A highly efficient catalyst for oxidation of alcohols, alkanes, and sulfides and epoxidation of alkenes. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5695] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Tonmoy Chakraborty
- Department of Chemistry University of Calcutta 92, A.P.C.Road Kolkata 700009 India
| | - Rimpa Mondal
- Department of Chemistry Diamond Harbour Women's University Diamond Harbour Road, Sarisha, South 24 Parganas (S) West Bengal 743368 India
| | - Rinku Ghanta
- Department of Chemistry Diamond Harbour Women's University Diamond Harbour Road, Sarisha, South 24 Parganas (S) West Bengal 743368 India
| | - Aratrika Chakraborty
- Department of Chemistry University of Calcutta 92, A.P.C.Road Kolkata 700009 India
| | - Tanmay Chattopadhyay
- Department of Chemistry Diamond Harbour Women's University Diamond Harbour Road, Sarisha, South 24 Parganas (S) West Bengal 743368 India
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14
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Chakraborty B, Ghosh I, Jana RD, Paine TK. Oxidative C-N bond cleavage of (2-pyridylmethyl)amine-based tetradentate supporting ligands in ternary cobalt(ii)-carboxylate complexes. Dalton Trans 2020; 49:3463-3472. [PMID: 32103212 DOI: 10.1039/c9dt04438h] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three mononuclear cobalt(ii)-carboxylate complexes, [(TPA)CoII(benzilate)]+ (1), [(TPA)CoII(benzoate)]+ (2) and [(iso-BPMEN)CoII(benzoate)]+ (3), of N4 ligands (TPA = tris(2-pyridylmethyl)amine and iso-BPMEN = N1,N1-dimethyl-N2,N2-bis((pyridin-2-yl)methyl)ethane-1,2-diamine) were isolated to investigate their reactivity toward dioxygen. Monodentate (η1) binding of the carboxylates to the metal centre favours the five-coordinate cobalt(ii) complexes (1-3) for dioxygen activation. Complex 1 slowly reacts with dioxygen to enable the oxidative decarboxylation of the coordinated α-hydroxy acid (benzilate). Prolonged exposure of the reaction solution of 2 to dioxygen results in the formation of [(DPA)CoIII(picolinate)(benzoate)]+ (4) and [CoIII(BPCA)2]+ (5) (DPA = di(2-picolyl)amine and HBPCA = bis(2-pyridylcarbonyl)amide), whereas only [(DPEA)CoIII(picolinate)(benzoate)]+ (6) (DPEA = N1,N1-dimethyl-N2-(pyridine-2-ylmethyl)-ethane-1,2-diamine) is isolated from the final oxidised solution of 3. The modified ligand DPA (or DPEA) is formed via the oxidative C-N bond cleavage of the supporting ligands. Further oxidation of the -CH2- moiety to -C([double bond, length as m-dash]O)- takes place in the transformation of DPA to HBPCA on the cobalt(ii) centre. Labelling experiments with 18O2 confirm the incorporation of oxygen atoms from molecular oxygen into the oxidised products. Mixed labelling studies with 16O2 and H2O18 strongly support the involvement of water in the C-N bond cleavage pathway. A comparison of the dioxygen reactivity of the cobalt complexes (1-3) with those of several other five-coordinate mononuclear complexes [(TPA)CoII(X)]+/2+ (X = Cl, CH3CN, acetate, benzoylformate, salicylate and phenylpyruvate) establishes the role of the carboxylate co-ligands in the activation of dioxygen and subsequent oxidative cleavage of the supporting ligands by a metal-oxygen oxidant.
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Affiliation(s)
- Biswarup Chakraborty
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India.
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15
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Harsha KG, Appalanaidu E, Rao BA, Baggi TR, Rao VJ. ON–OFF Fluorescent Imidazole Derivative for Sensitive and Selective Detection of Copper(II) Ions. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2020. [DOI: 10.1134/s1070428020010248] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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16
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Hossain SM, Dam GK, Mishra S, Singh AK. A nano-molar level fluorogenic and oxidation state-selective chromogenic dual reversible chemosensor for multiple targets, Cu 2+/S 2− and Fe 3+/F − ions. NEW J CHEM 2020. [DOI: 10.1039/d0nj02777d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A pyridine–pyrazole–pyrene-based multipurpose chemosensor has been introduced which has been found to exhibit excellent luminescent and optical properties.
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Affiliation(s)
- Sayed Muktar Hossain
- School of Basic Sciences
- Indian Institute of Technology Bhubaneswar
- Bhubaneswar
- India
| | - Gourab Kumar Dam
- School of Basic Sciences
- Indian Institute of Technology Bhubaneswar
- Bhubaneswar
- India
| | - Sagarika Mishra
- School of Basic Sciences
- Indian Institute of Technology Bhubaneswar
- Bhubaneswar
- India
| | - Akhilesh Kumar Singh
- School of Basic Sciences
- Indian Institute of Technology Bhubaneswar
- Bhubaneswar
- India
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17
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Mala R, Nandhagopal M, Narayanasamy M, Thennarasu S. An Imidazo[1,2‐a]pyridine Derivative That Enables Selective and Sequential Sensing of Cu
2+
and CN
−
Ions in Aqueous and Biological Samples. ChemistrySelect 2019. [DOI: 10.1002/slct.201903064] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ramanjaneyulu Mala
- Organic and Bioorgnic Chemistry LaboratoryAcademy of Scientific and Innovative Research (AcSIR)CSIR-Central LeatherResearch Institute, Adyar Chennai 600020 India
| | - Manivannan Nandhagopal
- Biocontrol and Micrrobial Metaboiltes LaboratoryCenter for AdvancedStudies in BotanyUnversity of MadrasGuindy Campus Chennai 600025 India
| | - Mathivanan Narayanasamy
- Biocontrol and Micrrobial Metaboiltes LaboratoryCenter for AdvancedStudies in BotanyUnversity of MadrasGuindy Campus Chennai 600025 India
| | - Sathiah Thennarasu
- Organic and Bioorgnic Chemistry LaboratoryAcademy of Scientific and Innovative Research (AcSIR)CSIR-Central LeatherResearch Institute, Adyar Chennai 600020 India
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18
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Mononuclear copper(II) complexes containing a macrocyclic ditopic ligand: Synthesis, structures and properties. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.119081] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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19
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Singh N, Botcha NK, Jones TM, Ertem MZ, Niklas J, Farquhar ER, Poluektov OG, Mukherjee A. Reactivity of bio-inspired Cu(II) (N2/Py2) complexes with peroxide at room temperature. J Inorg Biochem 2019; 197:110674. [DOI: 10.1016/j.jinorgbio.2019.03.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 03/05/2019] [Accepted: 03/18/2019] [Indexed: 12/01/2022]
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20
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Kim B, Jeong D, Ohta T, Cho J. Nucleophilic reactivity of a copper(II)-hydroperoxo complex. Commun Chem 2019. [DOI: 10.1038/s42004-019-0187-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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21
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Abstract
Metal-oxyl (Mn+-O•) complexes having an oxyl radical ligand, which are electronically equivalent to well-known metal-oxo (M(n+1)+═O) complexes, are surveyed as a new category of metal-based oxidants. Detection and characterization of Mn+-O• species have been made in some cases, although proposals and characterization of the species are mostly done on the basis of density functional theory (DFT) calculations. The reactivity of Mn+-O• complexes will provide a way to achieve potentially difficult oxidative conversion of substrates. This Viewpoint will provide state-of-the-art knowledge on the Mn+-O• species in terms of the formation, characterization, and DFT-based proposals to shed light on the characteristics of the intriguing oxidatively active species.
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Affiliation(s)
- Yoshihiro Shimoyama
- Department of Chemistry, Faculty of Pure and Applied Sciences , University of Tsukuba , Tsukuba , Ibaraki 305-8571 , Japan.,Interdisciplinary Research Center for Catalytic Chemistry , National Institute of Advanced Industrial Science and Technology (AIST) , Tsukuba , Ibaraki 305-8565 , Japan
| | - Takahiko Kojima
- Department of Chemistry, Faculty of Pure and Applied Sciences , University of Tsukuba , Tsukuba , Ibaraki 305-8571 , Japan
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22
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Neira A, Martínez-Alanis PR, Aullón G, Flores-Alamo M, Zerón P, Company A, Chen J, Kasper JB, Browne WR, Nordlander E, Castillo I. Oxidative Cleavage of Cellobiose by Lytic Polysaccharide Monooxygenase (LPMO)-Inspired Copper Complexes. ACS OMEGA 2019; 4:10729-10740. [PMID: 31460171 PMCID: PMC6648734 DOI: 10.1021/acsomega.9b00785] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 06/06/2019] [Indexed: 06/10/2023]
Abstract
The potentially tridentate ligand bis[(1-methyl-2-benzimidazolyl)ethyl]amine (2BB) was employed to prepare copper complexes [(2BB)CuI]OTf and [(2BB)CuII(H2O)2](OTf)2 as bioinspired models of lytic polysaccharide copper-dependent monooxygenase (LPMO) enzymes. Solid-state characterization of [(2BB)CuI]OTf revealed a Cu(I) center with a T-shaped coordination environment and metric parameters in the range of those observed in reduced LPMOs. Solution characterization of [(2BB)CuII(H2O)2](OTf)2 indicates that [(2BB)CuII(H2O)2]2+ is the main species from pH 4 to 7.5; above pH 7.5, the hydroxo-bridged species [{(2BB)CuII(H2O) x }2(μ-OH)2]2+ is also present, on the basis of cyclic voltammetry and mass spectrometry. These observations imply that deprotonation of the central amine of Cu(II)-coordinated 2BB is precluded, and by extension, amine deprotonation in the histidine brace of LPMOs appears unlikely at neutral pH. The complexes [(2BB)CuI]OTf and [(2BB)CuII(H2O)2](OTf)2 act as precursors for the oxidative degradation of cellobiose as a cellulose model substrate. Spectroscopic and reactivity studies indicate that a dicopper(II) side-on peroxide complex generated from [(2BB)CuI]OTf/O2 or [(2BB)CuII(H2O)2](OTf)2/H2O2/NEt3 oxidizes cellobiose both in acetonitrile and aqueous phosphate buffer solutions, as evidenced from product analysis by high-performance liquid chromatography-mass spectrometry. The mixture of [(2BB)CuII(H2O)2](OTf)2/H2O2/NEt3 results in more extensive cellobiose degradation. Likewise, the use of both [(2BB)CuI]OTf and [(2BB)CuII(H2O)2](OTf)2 with KO2 afforded cellobiose oxidation products. In all cases, a common Cu(II) complex formulated as [(2BB)CuII(OH)(H2O)]+ was detected by mass spectrometry as the final form of the complex.
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Affiliation(s)
- Andrea.
C. Neira
- Instituto
de Química and Facultad de Química, División
de Estudios de Posgrado, Universidad Nacional
Autónoma de México, Circuito Exterior, CU, 04510 Ciudad de
México, México
| | - Paulina R. Martínez-Alanis
- Departament
de Química Inorgànica i Orgànica and Institut
de Química Teòrica i Computacional, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Gabriel Aullón
- Departament
de Química Inorgànica i Orgànica and Institut
de Química Teòrica i Computacional, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Marcos Flores-Alamo
- Instituto
de Química and Facultad de Química, División
de Estudios de Posgrado, Universidad Nacional
Autónoma de México, Circuito Exterior, CU, 04510 Ciudad de
México, México
| | - Paulino Zerón
- Instituto
de Química and Facultad de Química, División
de Estudios de Posgrado, Universidad Nacional
Autónoma de México, Circuito Exterior, CU, 04510 Ciudad de
México, México
| | - Anna Company
- Institut
de Química Computacional i Catàlisi (IQCC), Departament
de Química, Universitat de Girona, C/ M. Aurèlia Capmany 69, 17003 Girona, Catalonia, Spain
| | - Juan Chen
- Molecular
Inorganic Chemistry, Stratingh Institute for Chemistry, Faculty of
Science and Health, University of Groningen, Nijenborgh 4, 9747AG Groningen, The Netherlands
| | - Johann B. Kasper
- Molecular
Inorganic Chemistry, Stratingh Institute for Chemistry, Faculty of
Science and Health, University of Groningen, Nijenborgh 4, 9747AG Groningen, The Netherlands
| | - Wesley R. Browne
- Molecular
Inorganic Chemistry, Stratingh Institute for Chemistry, Faculty of
Science and Health, University of Groningen, Nijenborgh 4, 9747AG Groningen, The Netherlands
| | - Ebbe Nordlander
- Chemical
Physics, Department of Chemistry, Lund University, Box 124, SE-221 00 Lund, Sweden
| | - Ivan Castillo
- Instituto
de Química and Facultad de Química, División
de Estudios de Posgrado, Universidad Nacional
Autónoma de México, Circuito Exterior, CU, 04510 Ciudad de
México, México
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23
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Trammell R, D'Amore L, Cordova A, Polunin P, Xie N, Siegler MA, Belanzoni P, Swart M, Garcia-Bosch I. Directed Hydroxylation of sp 2 and sp 3 C-H Bonds Using Stoichiometric Amounts of Cu and H 2O 2. Inorg Chem 2019; 58:7584-7592. [PMID: 31084018 DOI: 10.1021/acs.inorgchem.9b00901] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The use of copper for C-H bond functionalization, compared to other metals, is relatively unexplored. Herein, we report a synthetic protocol for the regioselective hydroxylation of sp2 and sp3 C-H bonds using a directing group, stoichiometric amounts of Cu and H2O2. A wide array of aromatic ketones and aldehydes are oxidized in the carbonyl γ-position with remarkable yields. We also expanded this methodology to hydroxylate the β-position of alkylic ketones. Spectroscopic characterization, kinetics, and density functional theory calculations point toward the involvement of a mononuclear LCuII(OOH) species, which oxidizes the aromatic sp2 C-H bonds via a concerted heterolytic O-O bond cleavage with concomitant electrophilic attack on the arene system.
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Affiliation(s)
- Rachel Trammell
- Department of Chemistry , Southern Methodist University , Dallas , Texas 75275 , United States
| | - Lorenzo D'Amore
- University of Girona , Campus Montilivi (Ciències), IQCC , 17004 Girona , Spain
| | - Alexandra Cordova
- Department of Chemistry , Southern Methodist University , Dallas , Texas 75275 , United States
| | - Pavel Polunin
- Department of Chemistry , Southern Methodist University , Dallas , Texas 75275 , United States
| | - Nan Xie
- Department of Chemistry , Southern Methodist University , Dallas , Texas 75275 , United States
| | - Maxime A Siegler
- Johns Hopkins University , Baltimore , Maryland 21218 , United States
| | - Paola Belanzoni
- Dipartimento di Chimica, Biologia e Biotecnologie , Università degli Studi di Perugia , Via Elce di Sotto 8 , 06123 Perugia , Italy.,Consortium for Computational Molecular and Materials Sciences (CMS)2 , Via Elce di Sotto 8 , 06123 Perugia , Italy
| | - Marcel Swart
- University of Girona , Campus Montilivi (Ciències), IQCC , 17004 Girona , Spain.,ICREA , Pg. Lluís Companys 23 , 08010 Barcelona , Spain
| | - Isaac Garcia-Bosch
- Department of Chemistry , Southern Methodist University , Dallas , Texas 75275 , United States
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24
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Phapale D, Kushwaha A, Das D. A simple benzimidazole styryl-based colorimetric chemosensor for dual sensing application. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 214:111-118. [PMID: 30771591 DOI: 10.1016/j.saa.2019.02.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 01/25/2019] [Accepted: 02/04/2019] [Indexed: 06/09/2023]
Abstract
A new colorimetric styryl-benzimidazole based receptor to recognize more than one analyte trans-2-[4'-(dimethylamino)styryl]benzimidazole) (L1) has been synthesized and fully characterized by 13C and 1H NMR, elemental analysis, UV-vis spectroscopy, and HRMS. Investigation of sensing ability of receptor L1 was carried out in presence of multiple anions (Br-, CN-, Cl-, ClO4-, F-, HSO4-, PF6-, NO3-, S2-, OH-, AcO- and H2PO4-) and cations (Cu2+, Cr3+, Al3+, Mg2+, Cd2+, Ni2+, Fe3+, K+, Fe2+, Mn2+, Ag+, Hg2+, Ca2+, Co2+, Pb2+, Na+, and Zn2+) by using UV-vis spectroscopy. Receptor L1 showed colorimetric response towards only for HSO4- ion. Receptor L1-HSO4- interaction confirmed with the help of 1H NMR titration. Among various cations, L1 selectively sense the Cu2+ and Al3+ with the drastic colour change from yellow to green and dark yellow respectively. The stoichiometric binding ratio of L1 with HSO4-, Cu2+, and Al3+ found to be 1:1 by jobs method and HRMS data proved the complex formation between L1 and Cu2+/Al3+ with very low detection limit. In addition to explore practical applicability of L1, paper strips have been made and used to detect HSO4- and Cu2+ ions, respectively, up to 10 ppm level.
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Affiliation(s)
- Daulat Phapale
- Department of Chemistry, Institute of Chemical Technology, Matunga, Mumbai 400019, India
| | - Archana Kushwaha
- Department of Chemistry, Institute of Chemical Technology, Matunga, Mumbai 400019, India
| | - Dipanwita Das
- Department of Chemistry, Institute of Chemical Technology, Matunga, Mumbai 400019, India.
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25
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Trammell R, Rajabimoghadam K, Garcia-Bosch I. Copper-Promoted Functionalization of Organic Molecules: from Biologically Relevant Cu/O 2 Model Systems to Organometallic Transformations. Chem Rev 2019; 119:2954-3031. [PMID: 30698952 DOI: 10.1021/acs.chemrev.8b00368] [Citation(s) in RCA: 157] [Impact Index Per Article: 31.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Copper is one of the most abundant and less toxic transition metals. Nature takes advantage of the bioavailability and rich redox chemistry of Cu to carry out oxygenase and oxidase organic transformations using O2 (or H2O2) as oxidant. Inspired by the reactivity of these Cu-dependent metalloenzymes, chemists have developed synthetic protocols to functionalize organic molecules under enviormentally benign conditions. Copper also promotes other transformations usually catalyzed by 4d and 5d transition metals (Pd, Pt, Rh, etc.) such as nitrene insertions or C-C and C-heteroatom coupling reactions. In this review, we summarized the most relevant research in which copper promotes or catalyzes the functionalization of organic molecules, including biological catalysis, bioinspired model systems, and organometallic reactivity. The reaction mechanisms by which these processes take place are discussed in detail.
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Affiliation(s)
- Rachel Trammell
- Department of Chemistry , Southern Methodist University , Dallas , Texas 75275 , United States
| | | | - Isaac Garcia-Bosch
- Department of Chemistry , Southern Methodist University , Dallas , Texas 75275 , United States
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26
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Quist DA, Ehudin MA, Karlin KD. Unprecedented direct cupric-superoxo conversion to a bis- μ-oxo dicopper(III) complex and resulting oxidative activity. Inorganica Chim Acta 2019; 485:155-161. [PMID: 30988551 PMCID: PMC6461407 DOI: 10.1016/j.ica.2018.10.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Investigations of small molecule copper-dioxygen chemistry can and have provided fundamental insights into enzymatic processes (e.g., copper metalloenzyme dioxygen binding geometries and their associated spectroscopy and substrate reactivity). Strategically designing copper-binding ligands has allowed for insight into properties that favor specific (di)copper-dioxygen species. Herein, the tetradentate tripodal TMPA-based ligand (TMPA = tris((2-pyridyl)methyl)amine) possessing a methoxy moiety in the 6-pyridyl position on one arm (OCH3TMPA) was investigated. This system allows for a trigonal bipyramidal copper(II) geometry as shown by the UV-vis and EPR spectra of the cupric complex [(OCH3TMPA)CuII(OH2)](ClO4)2. Cyclic voltammetry experiments determined the reduction potential of this copper(II) species to be -0.35 V vs. Fc+/0 in acetonitrile, similar to other TMPA-derivatives bearing sterically bulky 6-pyridyl substituents. The copper-dioxygen reactivity is also analogous to these TMPA-derivatives, affording a bis-μ-oxo dicopper(III) complex, [{(OCH3TMPA)CuIII}2(O2-)2]2+, upon oxygenation of the copper(I) complex [(OCH3TMPA)CuI](B(C6F5)4) at cryogenic temperatures in 2-methyltetrahydrofuran. This highly reactive intermediate is capable of oxidizing phenolic substrates through a net hydrogen atom abstraction. However, after bubbling of the precursor copper(I) complex with dioxygen at very low temperatures (-135 °C), a cupric superoxide species, [(OCH3TMPA)CuII(O2 •-)]+, is initially formed before slowly converting to [{(OCH3TMPA)CuIII}2(O2-)2]2+. This appears to be the first instance of the direct conversion of a cupric superoxide to a bis-μ-oxo dicopper(III) species in copper(I)-dioxygen chemistry.
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Affiliation(s)
- David A. Quist
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Melanie A. Ehudin
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Kenneth D. Karlin
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
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27
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Adam SM, Wijeratne GB, Rogler PJ, Diaz DE, Quist DA, Liu JJ, Karlin KD. Synthetic Fe/Cu Complexes: Toward Understanding Heme-Copper Oxidase Structure and Function. Chem Rev 2018; 118:10840-11022. [PMID: 30372042 PMCID: PMC6360144 DOI: 10.1021/acs.chemrev.8b00074] [Citation(s) in RCA: 132] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Heme-copper oxidases (HCOs) are terminal enzymes on the mitochondrial or bacterial respiratory electron transport chain, which utilize a unique heterobinuclear active site to catalyze the 4H+/4e- reduction of dioxygen to water. This process involves a proton-coupled electron transfer (PCET) from a tyrosine (phenolic) residue and additional redox events coupled to transmembrane proton pumping and ATP synthesis. Given that HCOs are large, complex, membrane-bound enzymes, bioinspired synthetic model chemistry is a promising approach to better understand heme-Cu-mediated dioxygen reduction, including the details of proton and electron movements. This review encompasses important aspects of heme-O2 and copper-O2 (bio)chemistries as they relate to the design and interpretation of small molecule model systems and provides perspectives from fundamental coordination chemistry, which can be applied to the understanding of HCO activity. We focus on recent advancements from studies of heme-Cu models, evaluating experimental and computational results, which highlight important fundamental structure-function relationships. Finally, we provide an outlook for future potential contributions from synthetic inorganic chemistry and discuss their implications with relevance to biological O2-reduction.
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Affiliation(s)
- Suzanne M. Adam
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Gayan B. Wijeratne
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Patrick J. Rogler
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Daniel E. Diaz
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - David A. Quist
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Jeffrey J. Liu
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Kenneth D. Karlin
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
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28
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Snider VG, Pella BJ, Mukherjee A. Synthesis, characterization, and reactivity of copper complexes supported by the TPMEN ligand framework. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.09.041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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29
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Zhang J, Wei WJ, Lu X, Yang H, Chen Z, Liao RZ, Yin G. Nonredox Metal Ions Promoted Olefin Epoxidation by Iron(II) Complexes with H2O2: DFT Calculations Reveal Multiple Channels for Oxygen Transfer. Inorg Chem 2017; 56:15138-15149. [DOI: 10.1021/acs.inorgchem.7b02463] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Jisheng Zhang
- School of Chemistry and Chemical Engineering, Key laboratory
of Material Chemistry for Energy Conversion and Storage, Ministry
of Education, Hubei Key Laboratory of Material Chemistry and Service
Failure, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Wen-Jie Wei
- School of Chemistry and Chemical Engineering, Key laboratory
of Material Chemistry for Energy Conversion and Storage, Ministry
of Education, Hubei Key Laboratory of Material Chemistry and Service
Failure, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Xiaoyan Lu
- School of Chemistry and Chemical Engineering, Key laboratory
of Material Chemistry for Energy Conversion and Storage, Ministry
of Education, Hubei Key Laboratory of Material Chemistry and Service
Failure, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Hang Yang
- School of Chemistry and Chemical Engineering, Key laboratory
of Material Chemistry for Energy Conversion and Storage, Ministry
of Education, Hubei Key Laboratory of Material Chemistry and Service
Failure, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Zhuqi Chen
- School of Chemistry and Chemical Engineering, Key laboratory
of Material Chemistry for Energy Conversion and Storage, Ministry
of Education, Hubei Key Laboratory of Material Chemistry and Service
Failure, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Rong-Zhen Liao
- School of Chemistry and Chemical Engineering, Key laboratory
of Material Chemistry for Energy Conversion and Storage, Ministry
of Education, Hubei Key Laboratory of Material Chemistry and Service
Failure, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Guochuan Yin
- School of Chemistry and Chemical Engineering, Key laboratory
of Material Chemistry for Energy Conversion and Storage, Ministry
of Education, Hubei Key Laboratory of Material Chemistry and Service
Failure, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
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30
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Tsuji T, Zaoputra AA, Hitomi Y, Mieda K, Ogura T, Shiota Y, Yoshizawa K, Sato H, Kodera M. Specific Enhancement of Catalytic Activity by a Dicopper Core: Selective Hydroxylation of Benzene to Phenol with Hydrogen Peroxide. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702291] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Tomokazu Tsuji
- Department of Molecular Chemistry and Biochemistry Doshisha University, Kyotanabe Kyoto 610-0321 Japan
| | - Antonius Andre Zaoputra
- Department of Molecular Chemistry and Biochemistry Doshisha University, Kyotanabe Kyoto 610-0321 Japan
| | - Yutaka Hitomi
- Department of Molecular Chemistry and Biochemistry Doshisha University, Kyotanabe Kyoto 610-0321 Japan
| | - Kaoru Mieda
- Department of Life Science University of Hyogo Kouto, 2-1, Ako-gun Kamigori-cho Hyogo 678-1297 Japan
| | - Takashi Ogura
- Department of Life Science University of Hyogo Kouto, 2-1, Ako-gun Kamigori-cho Hyogo 678-1297 Japan
| | - Yoshihito Shiota
- Institute for Materials Chemistry and Engineering Kyushu University Fukuoka 819-0395 Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering Kyushu University Fukuoka 819-0395 Japan
| | - Hiroyasu Sato
- Application Laboratory Rigaku Corporation, Akishima Tokyo 196-8666 Japan
| | - Masahito Kodera
- Department of Molecular Chemistry and Biochemistry Doshisha University, Kyotanabe Kyoto 610-0321 Japan
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31
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Tsuji T, Zaoputra AA, Hitomi Y, Mieda K, Ogura T, Shiota Y, Yoshizawa K, Sato H, Kodera M. Specific Enhancement of Catalytic Activity by a Dicopper Core: Selective Hydroxylation of Benzene to Phenol with Hydrogen Peroxide. Angew Chem Int Ed Engl 2017; 56:7779-7782. [PMID: 28561921 DOI: 10.1002/anie.201702291] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 03/30/2017] [Indexed: 11/11/2022]
Abstract
A dicopper(II) complex, stabilized by the bis(tpa) ligand 1,2-bis[2-[bis(2-pyridylmethyl)aminomethyl]-6-pyridyl]ethane (6-hpa), [Cu2 (μ-OH)(6-hpa)]3+ , was synthesized and structurally characterized. This complex catalyzed selective hydroxylation of benzene to phenol using H2 O2 , thus attaining large turnover numbers (TONs) and high H2 O2 efficiency. The TON after 40 hours for the phenol production exceeded 12000 in MeCN at 50 °C under N2 , the highest value reported for benzene hydroxylation with H2 O2 catalyzed by homogeneous complexes. At 22 % benzene conversion, phenol (95.2 %) and p-benzoquinone (4.8 %) were produced. The mechanism of H2 O2 activation and benzene hydroxylation is proposed.
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Affiliation(s)
- Tomokazu Tsuji
- Department of Molecular Chemistry and Biochemistry, Doshisha University, Kyotanabe, Kyoto, 610-0321, Japan
| | - Antonius Andre Zaoputra
- Department of Molecular Chemistry and Biochemistry, Doshisha University, Kyotanabe, Kyoto, 610-0321, Japan
| | - Yutaka Hitomi
- Department of Molecular Chemistry and Biochemistry, Doshisha University, Kyotanabe, Kyoto, 610-0321, Japan
| | - Kaoru Mieda
- Department of Life Science, University of Hyogo, Kouto, 2-1, Ako-gun, Kamigori-cho, Hyogo, 678-1297, Japan
| | - Takashi Ogura
- Department of Life Science, University of Hyogo, Kouto, 2-1, Ako-gun, Kamigori-cho, Hyogo, 678-1297, Japan
| | - Yoshihito Shiota
- Institute for Materials Chemistry and Engineering, Kyushu University, Fukuoka, 819-0395, Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering, Kyushu University, Fukuoka, 819-0395, Japan
| | - Hiroyasu Sato
- Application Laboratory, Rigaku Corporation, Akishima, Tokyo, 196-8666, Japan
| | - Masahito Kodera
- Department of Molecular Chemistry and Biochemistry, Doshisha University, Kyotanabe, Kyoto, 610-0321, Japan
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32
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Phapale D, Gaikwad A, Das D. Selective recognition of Cu (II) and Fe (III) using a pyrene based chemosensor. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 178:160-165. [PMID: 28182986 DOI: 10.1016/j.saa.2017.01.064] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 01/24/2017] [Accepted: 01/27/2017] [Indexed: 06/06/2023]
Abstract
A pyrene-based colorimetric chemosensor 1-(pyren-1-yl)-N,N-bis-(pyridine-2-ylmethyl)methanamine (1) was synthesised for selective detection of Cu (II) and Fe (III) over the other metal cations Ni2+, Mg2+, Cd2+, Hg2+, Na+, K+, Ca2+, Co2+, Cr3+, Pb2+ and Zn2+. The significant changes in UV-vis absorption band of receptor 1 and the emergence of 660nm band in presence of Cu2+ ion indicates the selective binding of Cu2+ ion as compared to other metal cations which could easily be identified from the naked eye strong colour change. Job plots suggest a 1:1 and 2:1 stoichiometric binding of Cu2+ and Fe3+, respectively, which was evidenced by ESI-MS analysis. Chemosensor 1 explores a cost-effective and selective colorimetric sensor for naked eye detection of trace amount of Cu2+ and Fe3+ ions in presence of other metal cations.
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Affiliation(s)
- Daulat Phapale
- Department of Chemistry, Institute of Chemical Technology, Matunga, Mumbai 400019, India
| | - Akshay Gaikwad
- Department of Chemistry, Institute of Chemical Technology, Matunga, Mumbai 400019, India
| | - Dipanwita Das
- Department of Chemistry, Institute of Chemical Technology, Matunga, Mumbai 400019, India.
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33
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Yoon JW, Jeong H, Lee MH. A Turn-On Fluorescent Rhodamine-acyl Hydrazide for Selective Detection of Cu2+Ions. B KOREAN CHEM SOC 2017. [DOI: 10.1002/bkcs.11087] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jung Won Yoon
- Department of Chemistry; Sookmyung Women's University; Seoul 140-742 Korea
| | - Hyuk Jeong
- Department of Chemistry; Sookmyung Women's University; Seoul 140-742 Korea
| | - Min Hee Lee
- Department of Chemistry; Sookmyung Women's University; Seoul 140-742 Korea
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34
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Lu W, Xu H, Shen Z. Copper-catalyzed aromatic C-H alkoxylation with alcohols under aerobic conditions. Org Biomol Chem 2017; 15:1261-1267. [PMID: 28098319 DOI: 10.1039/c6ob02582j] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
An efficient protocol for copper-catalyzed aromatic C-H alkoxylation with alcohols has been developed under aerobic conditions. The protocol provides a complementary method to couple arenes and alcohols to furnish aromatic ethers. The advantages of this method are the employment of a cheap Cu(OAc)2 catalyst, oxygen as the terminal oxidant and alcohol as both an alkoxy reagent and a solvent. Notably, the catalytic amount of benzoic acid plays a significant role in this transformation.
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Affiliation(s)
- Wenkui Lu
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 DongchuanRoad, Shanghai 200240, China.
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35
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Gupta P, Diefenbach M, Holthausen MC, Förster M. Copper-Mediated Selective Hydroxylation of a Non-activated C−H Bond in Steroids: A DFT Study of Schönecker's Reaction. Chemistry 2016; 23:1427-1435. [DOI: 10.1002/chem.201604829] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Puneet Gupta
- Institut für Anorganische und Analytische Chemie; Johann Wolfgang Goethe-Universität Frankfurt; Max-von-Laue-Straße 7 60438 Frankfurt am Main Germany
- Present address: Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Martin Diefenbach
- Institut für Anorganische und Analytische Chemie; Johann Wolfgang Goethe-Universität Frankfurt; Max-von-Laue-Straße 7 60438 Frankfurt am Main Germany
| | - Max C. Holthausen
- Institut für Anorganische und Analytische Chemie; Johann Wolfgang Goethe-Universität Frankfurt; Max-von-Laue-Straße 7 60438 Frankfurt am Main Germany
| | - Moritz Förster
- Institut für Anorganische und Analytische Chemie; Johann Wolfgang Goethe-Universität Frankfurt; Max-von-Laue-Straße 7 60438 Frankfurt am Main Germany
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36
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Alreja P, Saini D, Gautam SS, Navneet, Kaur N. Novel 1,10-phenanthroline - di-2-picolylamine scaffold as a selective chemosensor for copper and cyanide ions. INORG CHEM COMMUN 2016. [DOI: 10.1016/j.inoche.2016.06.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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37
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Abstract
Primary copper(I)-dioxygen (O2) adducts, cupric-superoxide complexes, have been proposed intermediates in copper-containing dioxygen-activating monooxygenase and oxidase enzymes. Here, mechanisms of C-H activation by reactive copper-(di)oxygen intermediates are discussed, with an emphasis on cupric-superoxide species. Over the past 25 years, many synthetically derived cupric-superoxide model complexes have been reported. Due to the thermal instability of these intermediates, early studies focused on increasing their stability and obtaining physical characterization. More recently, in an effort to gain insight into the possible substrate oxidation step in some copper monooxygenases, several cupric-superoxide complexes have been used as surrogates to probe substrate scope and reaction mechanisms. These cupric superoxides are capable of oxidizing substrates containing weak O-H and C-H bonds. Mechanistic studies for some enzymes and model systems have supported an initial hydrogen-atom abstraction via the cupric-superoxide complex as the first step of substrate oxidation.
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Affiliation(s)
- Jeffrey J Liu
- Department of Chemistry, Johns Hopkins University, Baltimore MD 21218 (USA)
| | - Daniel E Diaz
- Department of Chemistry, Johns Hopkins University, Baltimore MD 21218 (USA)
| | - David A Quist
- 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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38
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Zhiquan L, Polen S, Hadad CM, RajanBabu TV, Badjić JD. Russian Nesting Doll Complexes of Molecular Baskets and Zinc Containing TPA Ligands. J Am Chem Soc 2016; 138:8253-8. [PMID: 27305044 DOI: 10.1021/jacs.6b04436] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Lei Zhiquan
- Department of Chemistry and
Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Shane Polen
- Department of Chemistry and
Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Christopher M. Hadad
- Department of Chemistry and
Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - T. V. RajanBabu
- Department of Chemistry and
Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Jovica D. Badjić
- Department of Chemistry and
Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
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39
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Karahalis GJ, Thangavel A, Chica B, Bacsa J, Dyer RB, Scarborough CC. Synthesis and Catalytic Reactivity of a Dicopper(II) μ-η2:η2-Peroxo Species Supported by 1,4,7-Tri-tert-butyl-1,4,7-triazacyclononane. Inorg Chem 2016; 55:1102-7. [DOI: 10.1021/acs.inorgchem.5b02205] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gregory J. Karahalis
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Arumugam Thangavel
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Bryant Chica
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - John Bacsa
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - R. Brian Dyer
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
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40
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Dhar D, Yee GM, Spaeth AD, Boyce DW, Zhang H, Dereli B, Cramer CJ, Tolman WB. Perturbing the Copper(III)-Hydroxide Unit through Ligand Structural Variation. J Am Chem Soc 2016; 138:356-68. [PMID: 26693733 PMCID: PMC4857600 DOI: 10.1021/jacs.5b10985] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Two new ligand sets, (pipMe)LH2 and (NO2)LH2 ((pipMe)L = N,N'-bis(2,6-diisopropylphenyl)-1-methylpiperidine-2,6-dicarboxamide, (NO2)L = N,N'-bis(2,6-diisopropyl-4-nitrophenyl)pyridine-2,6-dicarboxamide), are reported which are designed to perturb the overall electronics of the copper(III)-hydroxide core and the resulting effects on the thermodynamics and kinetics of its hydrogen-atom abstraction (HAT) reactions. Bond dissociation energies (BDEs) for the O-H bonds of the corresponding Cu(II)-OH2 complexes were measured that reveal that changes in the redox potential for the Cu(III)/Cu(II) couple are only partially offset by opposite changes in the pKa, leading to modest differences in BDE among the three compounds. The effects of these changes were further probed by evaluating the rates of HAT by the corresponding Cu(III)-hydroxide complexes from substrates with C-H bonds of variable strength. These studies revealed an overarching linear trend in the relationship between the log k (where k is the second-order rate constant) and the ΔH of reaction. Additional subtleties in measured rates arise, however, that are associated with variations in hydrogen-atom abstraction barrier heights and tunneling efficiencies over the temperature range from -80 to -20 °C, as inferred from measured kinetic isotope effects and corresponding electronic-structure-based transition-state theory calculations.
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Affiliation(s)
| | | | - Andrew D. Spaeth
- Department of Chemistry, Center for Metals in Biocatalysis, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455, United States
| | - David W. Boyce
- Department of Chemistry, Center for Metals in Biocatalysis, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455, United States
| | - Hongtu Zhang
- Department of Chemistry, Center for Metals in Biocatalysis, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455, United States
| | - Büsra Dereli
- Department of Chemistry, Center for Metals in Biocatalysis, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455, United States
| | - Christopher J. Cramer
- Department of Chemistry, Center for Metals in Biocatalysis, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455, United States
| | - William B. Tolman
- Department of Chemistry, Center for Metals in Biocatalysis, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455, United States
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41
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Chaloner L, Khomutovskaya A, Thomas F, Ottenwaelder X. Supramolecular control of monooxygenase reactivity in a copper(ii) cryptate. Dalton Trans 2016; 45:11109-19. [DOI: 10.1039/c6dt00490c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
We report on the formation and self-decomposition of Cu(ii)–hydroperoxo intermediates with a cryptand ligand. The second coordination sphere of the cryptand steers the oxidative reactivity of the intermediates towards the formation of an unprecedented N-oxide.
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Affiliation(s)
- L. Chaloner
- Department of Chemistry and Biochemistry
- Concordia University
- Montreal
- Canada
| | - A. Khomutovskaya
- Department of Chemistry and Biochemistry
- Concordia University
- Montreal
- Canada
| | - F. Thomas
- Équipe de Chimie Inorganique Redox
- Département de Chimie Moléculaire
- Université Joseph Fourier
- Cedex 9
- France
| | - X. Ottenwaelder
- Department of Chemistry and Biochemistry
- Concordia University
- Montreal
- Canada
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42
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Kim S, Ginsbach JW, Lee JY, Peterson RL, Liu JJ, Siegler MA, Sarjeant AA, Solomon EI, Karlin KD. Amine oxidative N-dealkylation via cupric hydroperoxide Cu-OOH homolytic cleavage followed by site-specific fenton chemistry. J Am Chem Soc 2015; 137:2867-74. [PMID: 25706825 PMCID: PMC4482616 DOI: 10.1021/ja508371q] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Copper(II) hydroperoxide species are significant intermediates in processes such as fuel cells and (bio)chemical oxidations, all involving stepwise reduction of molecular oxygen. We previously reported a Cu(II)-OOH species that performs oxidative N-dealkylation on a dibenzylamino group that is appended to the 6-position of a pyridyl donor of a tripodal tetradentate ligand. To obtain insights into the mechanism of this process, reaction kinetics and products were determined employing ligand substrates with various para-substituent dibenzyl pairs (-H,-H; -H,-Cl; -H,-OMe, and -Cl,-OMe), or with partially or fully deuterated dibenzyl N-(CH2Ph)2 moieties. A series of ligand-copper(II) bis-perchlorate complexes were synthesized, characterized, and the X-ray structures of the -H,-OMe analogue were determined. The corresponding metastable Cu(II)-OOH species were generated by addition of H2O2/base in acetone at -90 °C. These convert (t1/2 ≈ 53 s) to oxidatively N-dealkylated products, producing para-substituted benzaldehydes. Based on the experimental observations and supporting DFT calculations, a reaction mechanism involving dibenzylamine H-atom abstraction or electron-transfer oxidation by the Cu(II)-OOH entity could be ruled out. It is concluded that the chemistry proceeds by rate limiting Cu-O homolytic cleavage of the Cu(II)-(OOH) species, followed by site-specific copper Fenton chemistry. As a process of broad interest in copper as well as iron oxidative (bio)chemistries, a detailed computational analysis was performed, indicating that a Cu(I)OOH species undergoes O-O homolytic cleavage to yield a hydroxyl radical and Cu(II)OH rather than heterolytic cleavage to yield water and a Cu(II)-O(•-) species.
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Affiliation(s)
- Sunghee Kim
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
| | - Jake W. Ginsbach
- Department of Chemistry, Stanford University, Stanford, California 94305
| | - Jung Yoon Lee
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
| | - Ryan L. Peterson
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
| | - Jeffrey J. Liu
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
| | - Maxime A. Siegler
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
| | - Amy A. Sarjeant
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
| | - Edward I. Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305
| | - Kenneth D. Karlin
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218
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43
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Synthesis, characterization, cis-ligand substitution and catalytic alkane hydroxylation by mononuclear nickel(II) complexes stabilized with tetradentate tripodal ligands. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.01.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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44
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Rettenmeier CA, Wadepohl H, Gade LH. Structural Characterization of a Hydroperoxo Nickel Complex and Its Autoxidation: Mechanism of Interconversion between Peroxo, Superoxo, and Hydroperoxo Species. Angew Chem Int Ed Engl 2015; 54:4880-4. [DOI: 10.1002/anie.201500141] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Indexed: 11/06/2022]
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45
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Rettenmeier CA, Wadepohl H, Gade LH. Structural Characterization of a Hydroperoxo Nickel Complex and Its Autoxidation: Mechanism of Interconversion between Peroxo, Superoxo, and Hydroperoxo Species. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201500141] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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46
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Su XJ, Gao M, Jiao L, Liao RZ, Siegbahn PEM, Cheng JP, Zhang MT. Electrocatalytic Water Oxidation by a Dinuclear Copper Complex in a Neutral Aqueous Solution. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201411625] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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47
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Su XJ, Gao M, Jiao L, Liao RZ, Siegbahn PEM, Cheng JP, Zhang MT. Electrocatalytic Water Oxidation by a Dinuclear Copper Complex in a Neutral Aqueous Solution. Angew Chem Int Ed Engl 2015; 54:4909-14. [DOI: 10.1002/anie.201411625] [Citation(s) in RCA: 187] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Indexed: 11/11/2022]
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48
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Liu CC, Lin TS, Chan SI, Mou CY. A room temperature catalyst for toluene aliphatic C–H bond oxidation: Tripodal tridentate copper complex immobilized in mesoporous silica. J Catal 2015. [DOI: 10.1016/j.jcat.2014.12.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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49
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Huang L, Gu B, Su W, yin P, Li H. Proton donor modulating ESIPT-based fluorescent probes for highly sensitive and selective detection of Cu2+. RSC Adv 2015. [DOI: 10.1039/c5ra14443d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Two novel ESIPT-based fluorescent probes for Cu2+ detection were developed. Altering the linker in probe molecules reversed their sensing behavior. Both probes exhibited high selectivity and sensitivity to Cu2+, and can be used for cell imaging.
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Affiliation(s)
- Liyan Huang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- P. R. China
| | - Biao Gu
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- P. R. China
| | - Wei Su
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- P. R. China
| | - Peng yin
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- P. R. China
| | - Haitao Li
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- P. R. China
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50
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Abstract
In order to address how diverse metalloprotein active sites, in particular those containing iron and copper, guide O₂binding and activation processes to perform diverse functions, studies of synthetic models of the active sites have been performed. These studies have led to deep, fundamental chemical insights into how O₂coordinates to mono- and multinuclear Fe and Cu centers and is reduced to superoxo, peroxo, hydroperoxo, and, after O-O bond scission, oxo species relevant to proposed intermediates in catalysis. Recent advances in understanding the various factors that influence the course of O₂activation by Fe and Cu complexes are surveyed, with an emphasis on evaluating the structure, bonding, and reactivity of intermediates involved. The discussion is guided by an overarching mechanistic paradigm, with differences in detail due to the involvement of disparate metal ions, nuclearities, geometries, and supporting ligands providing a rich tapestry of reaction pathways by which O₂is activated at Fe and Cu sites.
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