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Jindal A, Kapoor S, Verma I, Raju A, Arora H, Tyagi P. Synthesis, Characterization and Antibacterial Investigation of Mononuclear Copper (II) Complexes of Amine-phenolate Based Ligands. Polycycl Aromat Compd 2023. [DOI: 10.1080/10406638.2023.2169720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Affiliation(s)
- Ambika Jindal
- Department of Basic and Applied Sciences, School of Engineering and Sciences, G D Goenka University, Gurugram, Haryana, India
| | - Sumeet Kapoor
- Department of Biochemical Engineering and Biotechnology, Hauz Khas, Indian Institute of Technology Delhi, New Delhi, Delhi, India
| | - Indresh Verma
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
| | - Anish Raju
- Department of Biochemical Engineering and Biotechnology, Hauz Khas, Indian Institute of Technology Delhi, New Delhi, Delhi, India
| | - Himanshu Arora
- Department of Chemistry, Faculty of Science, University of Allahabad, Prayagraj, Uttar Pradesh, India
| | - Priyanka Tyagi
- Department of Basic and Applied Sciences, School of Engineering and Sciences, G D Goenka University, Gurugram, Haryana, India
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Agarwal P, Kumar A, Verma I, Khanum G, Siddiqui N, Choquesillo-Lazarte D, Mota AJ, Javed S, Arora H. Dinuclear Phenoxo-Bridged Nickel(II) and Copper(II) Complexes of Phenolate-Based Tripodal Ligand: Theoretical and Experimental Insights. Polycycl Aromat Compd 2023. [DOI: 10.1080/10406638.2023.2173619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Affiliation(s)
- Pratibha Agarwal
- School of Engineering and Sciences, G. D. Goenka University, Gurugram, Haryana, India
| | - Akhilesh Kumar
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
| | - Indresh Verma
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
| | - Ghazala Khanum
- S.O. S in Chemistry, Jiwaji University, Gwalior, Madhya Pradesh, India
| | - Nazia Siddiqui
- Department of Chemistry, Dayalbagh Educational Institute, Agra, Uttar Pradesh, India
| | | | - Antonio J. Mota
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, Granada, Spain
| | - Saleem Javed
- Department of Chemistry, University of Allahabad, Prayagraj, Uttar Pradesh, India
| | - Himanshu Arora
- School of Engineering and Sciences, G. D. Goenka University, Gurugram, Haryana, India
- Department of Chemistry, University of Allahabad, Prayagraj, Uttar Pradesh, India
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Gu D, Liang N, Li Q, Li G, Yu D, Liu Y. Selective Photocatalyst for styrene epoxidation with atmospheric O 2 using covalent organic frameworks. Catal Sci Technol 2022. [DOI: 10.1039/d1cy02299g] [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
Fe@POG-OH was synthetized and used to photo-catalyze styrene epoxidation with high selectivity and high conversion at room temperature. O2˙− plays crucial roles in the effective and selective oxidation of styrene to styrene oxide.
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Affiliation(s)
- Defa Gu
- School of Chemistry, Beihang University, 37 Xueyuan Rd, Beijing, 100191, China
| | - Nianjie Liang
- School of Chemistry, Beihang University, 37 Xueyuan Rd, Beijing, 100191, China
| | - Qiaosheng Li
- School of Chemistry, Beihang University, 37 Xueyuan Rd, Beijing, 100191, China
| | - Guangwen Li
- Research Institute of Petroleum Processing, SINOPEC, Beijing 100083, China
| | - Dongdong Yu
- School of Chemistry, Beihang University, 37 Xueyuan Rd, Beijing, 100191, China
| | - Yuzhou Liu
- School of Chemistry, Beihang University, 37 Xueyuan Rd, Beijing, 100191, China
- Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, 37 Xueyuan Rd, Beijing, 100191, China
- Beijing Shenyun Zhihe Technology Co., Ltd., 2 Yongcheng North Rd, Beijing, 100094, China
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Biological Inspirations: Iron Complexes Mimicking the Catechol Dioxygenases. MATERIALS 2021; 14:ma14123250. [PMID: 34204660 PMCID: PMC8231159 DOI: 10.3390/ma14123250] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 06/07/2021] [Accepted: 06/09/2021] [Indexed: 11/18/2022]
Abstract
Within the broad group of Fe non-heme oxidases, our attention was focused on the catechol 1,2- and 2,3-dioxygenases, which catalyze the oxidative cleavage of aromatic rings. A large group of Fe complexes with N/O ligands, ranging from N3 to N2O2S, was developed to mimic the activity of these enzymes. The Fe complexes discussed in this work can mimic the intradiol/extradiol catechol dioxygenase reaction mechanism. Electronic effects of the substituents in the ligand affect the Lewis acidity of the Fe center, increasing the ability to activate dioxygen and enhancing the catalytic activity of the discussed biomimetic complexes. The ligand architecture, the geometric isomers of the complexes, and the substituent steric effects significantly affect the ability to bind the substrate in a monodentate and bidentate manner. The substrate binding mode determines the preferred mechanism and, consequently, the main conversion products. The preferred mechanism of action can also be affected by the solvents and their ability to form the stable complexes with the Fe center. The electrostatic interactions of micellar media, similar to SDS, also control the intradiol/extradiol mechanisms of the catechol conversion by discussed biomimetics.
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Agarwal P, Kumar A, Richa, Verma I, Erande RD, Kłak J, Mota AJ, Arora H, Rajput A. The reversible inter-conversion of copper( ii) dimers bearing phenolate-based ligands in their monomers: theoretical and experimental viewpoints. NEW J CHEM 2021. [DOI: 10.1039/d0nj00484g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The conversion of the studied dimers into their monomers by an acid and the regeneration of the dimeric core from the monomer by a base is rationalized.
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Affiliation(s)
- Pratibha Agarwal
- School of Engineering and Sciences
- G. D. Goenka University
- Gurugram
- India
| | - Akhilesh Kumar
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
- Department of Chemistry
| | - Richa
- School of Engineering and Sciences
- G. D. Goenka University
- Gurugram
- India
| | - Indresh Verma
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Rohan D. Erande
- Department of Chemistry
- Indian Institute of Technology Jodhpur
- Jodhpur 342037
- India
| | - Julia Kłak
- Faculty of Chemistry
- University of Wroclaw
- Wroclaw 50-383
- Poland
| | - Antonio J. Mota
- Department of Inorganic Chemistry
- Faculty of Science
- University of Granada
- Granada
- Spain
| | - Himanshu Arora
- School of Engineering and Sciences
- G. D. Goenka University
- Gurugram
- India
| | - Amit Rajput
- School of Engineering and Sciences
- G. D. Goenka University
- Gurugram
- India
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Christian GJ, Neese F, Ye S. Unravelling the Molecular Origin of the Regiospecificity in Extradiol Catechol Dioxygenases. Inorg Chem 2016; 55:3853-64. [PMID: 27050565 DOI: 10.1021/acs.inorgchem.5b02978] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Many factors have been suggested to control the selectivity for extradiol or intradiol cleavage in catechol dioxygenases. The varied selectivity of model complexes and the ability to force an extradiol enzyme to do intradiol cleavage indicate that the problem may be complex. In this paper we focus on the regiospecificity of the proximal extradiol dioxygenase, homoprotocatechuate 2,3-dioxygenase (HPCD), for which considerable advances have been made in our understanding of the mechanism from an experimental and computational standpoint. Two key steps in the reaction mechanism were investigated: (1) attack of the substrate by the superoxide moiety and (2) attack of the substrate by the oxyl radical generated by O-O bond cleavage. The selectivity at both steps was investigated through a systematic study of the role of the substrate and the first and second coordination spheres. For the isolated native substrate, intradiol cleavage is calculated to be both kinetically and thermodynamically favored, therefore nature must use the enzyme environment to reverse this preference. Two second sphere residues were found to play key roles in controlling the regiospecificity of the reaction: Tyr257 and His200. Tyr257 controls the selectivity by modulating the electronic structure of the substrate, while His200 controls selectivity through steric effects and by preventing alternative pathways to intradiol cleavage.
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Affiliation(s)
- Gemma J Christian
- Max-Planck Institute for Chemical Energy Conversion , Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany.,Avondale College of Higher Education , Cooranbong, New South Wales 2265, Australia
| | - Frank Neese
- Max-Planck Institute for Chemical Energy Conversion , Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Shengfa Ye
- Max-Planck Institute for Chemical Energy Conversion , Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
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Safaei E, Heidari S, Wojtczak A, Cotič P, Kozakiewicz A. 4-Nitrocatecholato iron(III) complexes of 2-aminomethyl pyridine-based bis(phenol) amine as structural models for catechol-bound 3,4-PCD. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2015.10.038] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Lakk-Bogáth D, Csonka R, Lorencz N, Giorgi M, Speier G, Kaizer J. Oxidant dependent oxidation of copper bound catecholate: Catecholase versus catechol dioxygenase activity. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.09.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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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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Heidari S, Safaei E, Wojtczak A, Cotič P, Kozakiewicz A. Iron(III) complexes of pyridine-based tetradentate aminophenol ligands as structural model complexes for the catechol-bound intermediate of catechol dioxygenases. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.02.067] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Váradi T, Pap JS, Giorgi M, Párkányi L, Csay T, Speier G, Kaizer J. Iron(III) complexes with meridional ligands as functional models of intradiol-cleaving catechol dioxygenases. Inorg Chem 2013; 52:1559-69. [PMID: 23320898 DOI: 10.1021/ic302378r] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Six dichloroiron(III) complexes of 1,3-bis(2'-arylimino)isoindoline (BAIH) with various N-donor aryl groups have been characterized by spectroscopy (infrared, UV-vis), electrochemistry (cyclic voltammetry), microanalysis, and in two cases X-ray crystallography. The structurally characterized Fe(III)Cl(2)(L(n)) complexes (n = 3, L(3) = 1,3-bis(2'-thiazolylimino)isoindoline and n = 5, L(5) = 1,3-bis(4-methyl-2'-piridylimino)isoindoline) are five-coordinate, trigonal bipyramidal with the isoindoline ligands occupying the two axial and one equatorial positions meridionally. These compounds served as precursors for catechol dioxygenase models that were formed in solution upon addition of 3,5-di-tert-butylcatechol (H(2)DBC) and excess triethylamine. These adducts react with dioxygen in N,N-dimethylformamide, and the analysis of the products by chromatography and mass spectrometry showed high intradiol over extradiol selectivity (the intradiol/extradiol product ratios varied between 46.5 and 6.5). Kinetic measurements were performed by following the change in the intensity of the catecholate to iron ligand-to-metal charge transfer (LMCT) band, the energy of which is influenced by the isoindolinate-ligand (827-960 nm). In combination with electrochemical investigations the kinetic studies revealed an inverse trend between reaction rates and oxidation potentials associated with the coordinated DBC(2-). On the basis of these results, a substrate activation mechanism is suggested for this system in which the geometry of the peroxide-bridged intermediate may be of key importance in regioselectivity.
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Affiliation(s)
- Tünde Váradi
- Department of Chemistry, University of Pannonia, 8201 Veszprém, Hungary
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