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Zardi P, Piękoś J, Bravin C, Wurst K, Droghetti F, Natali M, Licini G, Zambon A, Zonta C. Novel ligands from direct benzylic functionalisation of tris(2-pyridylmethyl)amine. Dalton Trans 2024; 53:13831-13836. [PMID: 39113567 DOI: 10.1039/d4dt02022g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/21/2024]
Abstract
Tris-(2-pyridylmethyl)amines (TPA or TPMA) are polipyrydine-based ligands extensively used in catalysis and supramolecular chemistry due their capability to form stable tetradentate complexes with a large variety of metals. The unsubstituted ligand, which is also commercially available, can be synthesised by consecutive alkylation of a picoline or by reductive amination of a pyridine aldehyde. In this article, we report a novel synthetic method which opens to the post-functionalisation of these ligands in the benzylic position. This novel derivatization strategy, beside providing synthetic access to novel structures and functions, has been used to prepare a series of metal complexes which have been tested in photochemical hydrogen evolution.
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Affiliation(s)
- Paolo Zardi
- Dipartimento di Scienze Chimiche e Geologiche, Università di Modena e Reggio Emilia, via Campi 103, 41125, Modena, Italy.
| | - Justyna Piękoś
- Dipartimento di Scienze Chimiche, Università di Padova, via Marzolo 1, 35131 Padova, Italy.
| | - Carlo Bravin
- Dipartimento di Scienze Chimiche, Università di Padova, via Marzolo 1, 35131 Padova, Italy.
| | - Klaus Wurst
- Department of General, Inorganic and Theoretical Chemistry University of Innsbruck, A-6020 Innsbruck, Austria
| | - Federico Droghetti
- Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie, Università di Ferrara, via L. Borsari 46, 44121 Ferrara, Italy
| | - Mirco Natali
- Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie, Università di Ferrara, via L. Borsari 46, 44121 Ferrara, Italy
| | - Giulia Licini
- Dipartimento di Scienze Chimiche, Università di Padova, via Marzolo 1, 35131 Padova, Italy.
- CIRCC Interuniversity Consortium Chemical Reactivity and Catalysis, Via Celso Ulpiani 27, 70126 Bari, Italy
| | - Alfonso Zambon
- Dipartimento di Scienze Chimiche e Geologiche, Università di Modena e Reggio Emilia, via Campi 103, 41125, Modena, Italy.
| | - Cristiano Zonta
- Dipartimento di Scienze Chimiche, Università di Padova, via Marzolo 1, 35131 Padova, Italy.
- CIRCC Interuniversity Consortium Chemical Reactivity and Catalysis, Via Celso Ulpiani 27, 70126 Bari, Italy
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2
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Celestine MJ, Lawrence MA, Schott O, Picard V, Hanan GS, Marquez EM, Harold CG, Kuester CT, Frenzel BA, Hamaker CG, Hightower SE, McMillen CD, Holder AA. Synthesis, structure, and hydrogen evolution studies of a heteroleptic Co(III) complex. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2020.120195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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3
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Guo X, Li C, Wang W, Hou Y, Zhang B, Wang X, Zhou Q. Polypyridyl Co complex-based water reduction catalysts: why replace a pyridine group with isoquinoline rather than quinoline? Dalton Trans 2021; 50:2042-2049. [PMID: 33475631 DOI: 10.1039/c9dt04767k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The electronic effect of the substituent has been fully leveraged to improve the activity of molecular water reduction catalysts (WRCs). However, the steric effect of the substituents has received less attention. In this work, a steric hindrance effect was observed in a quinoline-involved polypyridyl Co complex-based water reduction catalyst (WRC), which impedes the formation of Co(iii)-H from Co(i), two pivotal intermediates for H2 evolution, leading to significantly impaired electrocatalytic and photocatalytic activity with respect to its parent complex, [Co(TPA)Cl]Cl (TPA = tris(2-pyridinylmethyl)-amine). In sharp contrast, two isoquinoline-involved polypyridyl Co complexes exhibited significantly improved H2 evolution efficiencies compared to [Co(TPA)Cl]Cl, benefitting mainly from the more basic and conjugated features of isoquinoline over pyridine. The dramatically different influences caused by the replacement of a pyridine group in the TPA ligand by quinoline and isoquinoline fully demonstrates the important roles of both the electronic and steric effects of a substituent. Our results may provide novel insights for designing more efficient WRCs.
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Affiliation(s)
- Xusheng Guo
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry Chinese Academy of Science, Beijing 100190, P. R. China.
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4
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Guo X, Li C, Wang W, Zhang B, Hou Y, Wang X, Zhou Q. Electronic effects on polypyridyl Co complex-based water reduction catalysts. RSC Adv 2021; 11:24359-24365. [PMID: 35479006 PMCID: PMC9036631 DOI: 10.1039/d1ra02435c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Accepted: 07/06/2021] [Indexed: 12/19/2022] Open
Abstract
Three new isomeric cobalt complexes of TPA (tris(2-pyridylmethyl)amine) based on methoxy substitution at the ortho, meta and para positions, respectively, were constructed and their photocatalytic proton reduction efficiencies were compared. It was found that there are good linear correlations with the Hammett constants of the substituents for the computed Co–N bond lengths, redox potentials of CoII/I and CoI/0 events, and the photocatalytic activities of the complexes. The ortho-substituted Co complex distinguished itself from the others remarkably in all these comparisons, demonstrating the presence of a steric effect besides the electronic effect. For other examined complexes, a stronger electron-donating substituent may lead to a higher hydrogen evolution efficiency, suggesting that the formation of a Co(iii) hydride intermediate is the rate-limiting step. Three isomeric Co complexes showed a significant substituent electronic effect in photocatalytic hydrogen production.![]()
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Affiliation(s)
- Xusheng Guo
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Science
- Beijing 100190
- P. R. China
| | - Chao Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Science
- Beijing 100190
- P. R. China
| | - Weibo Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Science
- Beijing 100190
- P. R. China
| | - Baowen Zhang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Science
- Beijing 100190
- P. R. China
| | - Yuanjun Hou
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Science
- Beijing 100190
- P. R. China
| | - Xuesong Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Science
- Beijing 100190
- P. R. China
| | - Qianxiong Zhou
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Science
- Beijing 100190
- P. R. China
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5
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Tuning the reactivity of cobalt-based H2 production electrocatalysts via the incorporation of the peripheral basic functionalities. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213335] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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6
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Kumar NT, Bhoi U, Naulakha P, Das SK. A polyoxometalate supported copper dimeric complex: Synthesis, structure and electrocatalysis. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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7
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Papanikolaou MG, Elliott A, McAllister J, Gallos JK, Keramidas AD, Kabanos TA, Sproules S, Miras HN. Electrocatalytic hydrogen production by dinuclear cobalt(ii) compounds containing redox-active diamidate ligands: a combined experimental and theoretical study. Dalton Trans 2020; 49:15718-15730. [PMID: 33146215 DOI: 10.1039/d0dt02617d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The chiral dicobalt(ii) complex [CoII2(μ2-L)2] (1) (H2L = N2,N6-di(quinolin-8-yl)pyridine-2,6-dicarboxamide) and its tert-butyl analogue [CoII2(μ2-LBu)2] (2) were structurally characterized and their catalytic evolution of H2 was investigated.
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Affiliation(s)
| | | | - James McAllister
- West CHEM
- School of Chemistry
- University of Glasgow
- Glasgow G12 8QQ
- UK
| | - John K. Gallos
- Department of Chemistry
- Aristotle University of Thessaloniki
- Thessaloniki GR 541 24
- Greece
| | | | | | - Stephen Sproules
- West CHEM
- School of Chemistry
- University of Glasgow
- Glasgow G12 8QQ
- UK
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8
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Anderson polyoxometalate supported Cu(H2O)(phen) complex as an electrocatalyst for hydrogen evolution reaction in neutral medium. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.03.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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9
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Connell TU, Fraser CL, Czyz ML, Smith ZM, Hayne DJ, Doeven EH, Agugiaro J, Wilson DJD, Adcock JL, Scully AD, Gómez DE, Barnett NW, Polyzos A, Francis PS. The Tandem Photoredox Catalysis Mechanism of [Ir(ppy)2(dtb-bpy)]+ Enabling Access to Energy Demanding Organic Substrates. J Am Chem Soc 2019; 141:17646-17658. [DOI: 10.1021/jacs.9b07370] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
| | - Catherine L. Fraser
- School of Life and Environmental Sciences, Deakin University, Geelong, VIC 3220, Australia
| | - Milena L. Czyz
- School of Chemistry, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Zoe M. Smith
- School of Life and Environmental Sciences, Deakin University, Geelong, VIC 3220, Australia
| | - David J. Hayne
- School of Life and Environmental Sciences, Deakin University, Geelong, VIC 3220, Australia
| | - Egan H. Doeven
- Centre for Regional and Rural Futures, Deakin University, Geelong, VIC 3220, Australia
| | - Johnny Agugiaro
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC 3086, Australia
| | - David J. D. Wilson
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC 3086, Australia
| | - Jacqui L. Adcock
- School of Life and Environmental Sciences, Deakin University, Geelong, VIC 3220, Australia
| | | | - Daniel E. Gómez
- School of Science, RMIT University, Melbourne, VIC 3000, Australia
| | - Neil W. Barnett
- School of Life and Environmental Sciences, Deakin University, Geelong, VIC 3220, Australia
| | - Anastasios Polyzos
- School of Chemistry, The University of Melbourne, Parkville, VIC 3010, Australia
- CSIRO Manufacturing, Clayton, VIC 3168, Australia
| | - Paul S. Francis
- School of Life and Environmental Sciences, Deakin University, Geelong, VIC 3220, Australia
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10
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Kohler L, Niklas J, Johnson RC, Zeller M, Poluektov OG, Mulfort KL. Molecular Cobalt Catalysts for H2 Generation with Redox Activity and Proton Relays in the Second Coordination Sphere. Inorg Chem 2018; 58:1697-1709. [DOI: 10.1021/acs.inorgchem.8b03297] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Lars Kohler
- Division of Chemical Sciences and Engineering, Argonne National Laboratory, 9700 S. Cass Avenue, Lemont, Illinois 60439, United States
| | - Jens Niklas
- Division of Chemical Sciences and Engineering, Argonne National Laboratory, 9700 S. Cass Avenue, Lemont, Illinois 60439, United States
| | - Ryan C. Johnson
- Division of Chemical Sciences and Engineering, Argonne National Laboratory, 9700 S. Cass Avenue, Lemont, Illinois 60439, United States
| | - Matthias Zeller
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Oleg G. Poluektov
- Division of Chemical Sciences and Engineering, Argonne National Laboratory, 9700 S. Cass Avenue, Lemont, Illinois 60439, United States
| | - Karen L. Mulfort
- Division of Chemical Sciences and Engineering, Argonne National Laboratory, 9700 S. Cass Avenue, Lemont, Illinois 60439, United States
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11
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Panneerselvam M, Jaccob M. Role of Anation on the Mechanism of Proton Reduction Involving a Pentapyridine Cobalt Complex: A Theoretical Study. Inorg Chem 2018; 57:8116-8127. [PMID: 29969023 DOI: 10.1021/acs.inorgchem.8b00286] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Kinetic and thermodynamic aspects of proton reduction involving pentapyridine cobalt(II) complex were investigated with the help of quantum chemical calculations. Free energy profile of all possible mechanistic routes for proton reduction was constructed with the consideration of both anation and solvent bound pathways. The computed free energy profile shows that acetate ion plays a significant role in modulating the kinetic aspects of Co(III)-hydride formation which is found to be the key intermediate for proton reduction. Upon replacing solvent by acetate ion, one electron reduction and protonation of CoI species become more rapid along with slow displacement reaction. Most favorable pathways for hydrogen evolution from Co(III)-hydride species is also investigated. Among the four possible pathways, reduction followed by protonation of Co(III)-hydride (RPP) is found to be the most feasible pathway. On the basis of QTAIM and NBO analyses, the electronic origin of most favorable pathway is explained. The basicity of cobalt center along with thermodynamic stability of putative CoIII/II-H species is essentially a prime factor in deciding the most favorable pathway for hydrogen evolution. Our computed results are in good agreement with experimental observations and also provided adequate information to design cobalt-based molecular electrocatalysts for proton reduction in future.
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Affiliation(s)
- Murugesan Panneerselvam
- Department of Chemistry , Loyola College , Chennai 600 034 , Tamil Nadu , India.,Computational Chemistry Laboratory, Loyola Institute of Frontier Energy (LIFE) , Loyola College , Chennai 600 034 , Tamil Nadu , India
| | - Madhavan Jaccob
- Department of Chemistry , Loyola College , Chennai 600 034 , Tamil Nadu , India.,Computational Chemistry Laboratory, Loyola Institute of Frontier Energy (LIFE) , Loyola College , Chennai 600 034 , Tamil Nadu , India
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12
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Luo S, Bruggeman DF, Siegler MA, Bouwman E. Can pendant pyridyl arm assist the proton delivery in electrocatalysis? Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.02.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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Praveen PA, Ramesh Babu R, Balaji P, Murugadas A, Akbarsha MA. Laser assisted anticancer activity of benzimidazole based metal organic nanoparticles. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2018; 180:218-224. [PMID: 29459313 DOI: 10.1016/j.jphotobiol.2018.02.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 01/17/2018] [Accepted: 02/07/2018] [Indexed: 10/18/2022]
Abstract
Recent studies showed that the photothermal therapy can be effectively used for the targeted cancerous cells destruction. Hence, in the present study, benzimidazole based metal organic complex nanoparticles, dichloro cobalt(II) bis-benzimidazole (Co-BMZ) and dichloro copper(II) bis-benzimidazole (Cu-BMZ), were synthesized by reprecipitation method and their anti-cancer activity by means of photothermal effect has been studied. Transmission electron microscopy analysis shows that the particle size of Cu-BMZ is ∼100 nm and Co-BMZ is in the range between 100 and 400 nm. Zeta potential analysis ensures the stability of the synthesized nanoparticles. It is found that the nonlinear absorption of the nanoparticles increases with increase in laser power intensity. Phototoxicity of human lung cancer (A549) and the normal mouse embryonic fibroblast (NIH-3T3) cells was studied using a 650 nm laser. Even though both the cell lines were affected by laser irradiation, A549 cells show higher cell destruction and lower IC50 values than the normal cells. Docking studies were used to analyse the interaction site and the results showed that the Cu-BMZ molecules have higher dock score than the Co-BMZ molecules. The obtained results indicate that Cu-BMZ samples have lesser particle size, higher nonlinear absorption and higher interaction energy than the Co-BMZ samples.
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Affiliation(s)
- P A Praveen
- Crystal Growth and Thin Film Laboratory, Department of Physics, Bharathidasan University, Tiruchirappalli 620 024, Tamilnadu, India
| | - R Ramesh Babu
- Crystal Growth and Thin Film Laboratory, Department of Physics, Bharathidasan University, Tiruchirappalli 620 024, Tamilnadu, India.
| | - P Balaji
- National Centre for Alternatives to Animal Experiments, Bharathidasan University, Tiruchirappalli 620 024, Tamilnadu, India
| | - A Murugadas
- National Centre for Alternatives to Animal Experiments, Bharathidasan University, Tiruchirappalli 620 024, Tamilnadu, India
| | - M A Akbarsha
- National Centre for Alternatives to Animal Experiments, Bharathidasan University, Tiruchirappalli 620 024, Tamilnadu, India
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14
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Fukuzumi S, Lee YM, Nam W. Thermal and photocatalytic production of hydrogen with earth-abundant metal complexes. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2017.07.014] [Citation(s) in RCA: 98] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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15
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Leung CF, Cheng SC, Yang Y, Xiang J, Yiu SM, Ko CC, Lau TC. Efficient photocatalytic water reduction by a cobalt(ii) tripodal iminopyridine complex. Catal Sci Technol 2018. [DOI: 10.1039/c7cy01524k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Enhanced reactivity is observed in a cobalt tripodal iminopyridine WRC bearing a metal active site with a trigonal pyramidal coordination geometry.
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Affiliation(s)
- C.-F. Leung
- Department of Science and Environmental Studies
- The Education University of Hong Kong
- Tai Po
- China
| | - S.-C. Cheng
- Department of Chemistry
- City University of Hong Kong
- Tat Chee Avenue
- Kowloon
- China
| | - Y. Yang
- Department of Science and Environmental Studies
- The Education University of Hong Kong
- Tai Po
- China
| | - J. Xiang
- Department of Science and Environmental Studies
- The Education University of Hong Kong
- Tai Po
- China
- Department of Chemical and Environmental Engineering
| | - S.-M. Yiu
- Department of Chemistry
- City University of Hong Kong
- Tat Chee Avenue
- Kowloon
- China
| | - C.-C. Ko
- Department of Chemistry
- City University of Hong Kong
- Tat Chee Avenue
- Kowloon
- China
| | - T.-C. Lau
- Department of Chemistry
- City University of Hong Kong
- Tat Chee Avenue
- Kowloon
- China
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16
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Rao GK, Pell W, Gabidullin B, Korobkov I, Richeson D. Electro- and Photocatalytic Generation of H 2 Using a Distinctive Co II "PN 3 P" Pincer Supported Complex with Water or Saturated Saline as a Hydrogen Source. Chemistry 2017; 23:16763-16767. [PMID: 29044839 DOI: 10.1002/chem.201704882] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2017] [Indexed: 12/18/2022]
Abstract
Efficient electrocatalytic production of H2 from mixed water/acetonitrile solutions was achieved using three new CoII complexes supported by the neutral pincer ligand bis(diphenylphosphino)-2,6-di(methylamino)pyridine ("PN3 P"). At -1.9 V vs. Fc/Fc+ , these catalysts showed 96 % Faradaic efficiency with added water or saturated aqueous saline at rates of up to 316 L(mol cat)-1 (cm2 )-1 h-1 using a glassy carbon working electrode. The complex [Co(κ3 -2,6-{Ph2 PNMe}2 (NC5 H3 )Br2 ] (1) was also able to photocatalytically reduce water to hydrogen in the presence of a Ru(bpy)32+ photosensitizer and a reductant.
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Affiliation(s)
- Gyandshwar Kumar Rao
- Department of Chemistry and Biomolecular Science, Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie, Ottawa, ON, K1N 6N5, USA
| | - Wendy Pell
- Department of Chemistry and Biomolecular Science, Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie, Ottawa, ON, K1N 6N5, USA
| | - Bulat Gabidullin
- Department of Chemistry and Biomolecular Science, Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie, Ottawa, ON, K1N 6N5, USA
| | - Ilia Korobkov
- Department of Chemistry and Biomolecular Science, Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie, Ottawa, ON, K1N 6N5, USA
| | - Darrin Richeson
- Department of Chemistry and Biomolecular Science, Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie, Ottawa, ON, K1N 6N5, USA
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