1
|
Aragón J, Sun S, Fernández S, Lloret-Fillol J. Dichloromethane as C 1 Synthon for the Photoredox Catalytic Cyclopropanation of Aromatic Olefins. Angew Chem Int Ed Engl 2024:e202405580. [PMID: 38858168 DOI: 10.1002/anie.202405580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 05/27/2024] [Accepted: 06/10/2024] [Indexed: 06/12/2024]
Abstract
Dichloromethane, as a readily available and inexpensive C1 synthon is proposed as a powerful building block for cyclopropanation of alkenes under mild conditions. Herein, we report a highly efficient and versatile dual photoredox system, involving a nickel aminopyridine coordination complex and a photocatalyst, for the cyclopropanation of aromatic olefins using dichloromethane, under visible-light irradiation. The cyclopropanation protocol has been successfully applied at gram scale. Mechanistic studies suggest a Ni(II) pyridyl radical complex as the key intermediate for the homolytic cleavage of the Csp3-Cl bond, generating a chloromethyl radical that is captured by the olefin coupling partner. Our findings also highlight the versatility of this methodology. By directing the radical/polar crossover process, we were able to selectively drive the reaction towards either the formation of cyclopropyl derivatives or the corresponding non-cyclic alkyl chloride products. The methodology also successfully apply to geminal dichloroalkanes, including the formation of spiro[2,2] compounds. Moreover, our methodology extends to the synthesis of deuterium-labelled cyclopropanes, demonstrating its utility in isotopic labelling and broadening its applicability in chemical synthesis and drug development.
Collapse
Affiliation(s)
- Jordi Aragón
- Institut Català d'Investigació Química (ICIQ), Barcelona Institute of Science and Technology (BIST), Av. Països Catalans 16, 43007, Tarragona, España
| | - Suyun Sun
- Institut Català d'Investigació Química (ICIQ), Barcelona Institute of Science and Technology (BIST), Av. Països Catalans 16, 43007, Tarragona, España
| | - Sergio Fernández
- Institut Català d'Investigació Química (ICIQ), Barcelona Institute of Science and Technology (BIST), Av. Països Catalans 16, 43007, Tarragona, España
| | - Julio Lloret-Fillol
- Institut Català d'Investigació Química (ICIQ), Barcelona Institute of Science and Technology (BIST), Av. Països Catalans 16, 43007, Tarragona, España
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig de Lluís Companys, 23, 08010, Barcelona, España
| |
Collapse
|
2
|
Wang P, Le N, McCool JD, Donnadieu B, Erickson AN, Webster CE, Zhao X. Photocatalytic Hydrogen Production with A Molecular Cobalt Complex in Alkaline Aqueous Solutions. J Am Chem Soc 2024; 146:9493-9498. [PMID: 38530089 DOI: 10.1021/jacs.3c12928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/27/2024]
Abstract
The thermodynamic favorability of an alkaline solution for the oxidation of water suggests the need for developing hydrogen evolution reaction (HER) catalysts that can function in basic aqueous solutions so that both of the half reactions in overall water splitting can occur in mutually compatible solutions. Although photocatalytic HERs have been reported mostly in acidic solutions and a few at basic pHs in mixed organic aqueous solutions, visible-light driven HER catalyzed by molecular metal complexes in purely alkaline aqueous solutions remains largely unexplored. Here, we report a new cobalt complex with a tetrapyridylamine ligand that catalyzes photolytic HER with turnover number up to 218 000 in purely aqueous solutions at pH 9.0. Density functional theory (DFT) calculations suggested a modified electron transfer (E)-proton transfer (C)-electron transfer (E)-proton transfer (C) (mod-ECEC) pathway for hydrogen production from the protonation of CoII-H species. The remarkable catalytic activity resulting from subtle structural changes of the ligand scaffold highlights the importance of studying structure-function relationships in molecular catalyst design. Our present work significantly advances the development of a molecular metal catalyst for visible-light driven HER in more challenging alkaline aqueous solutions that holds substantial promise in solar-driven water-splitting systems.
Collapse
Affiliation(s)
- Ping Wang
- Department of Chemistry, University of Memphis, Memphis, Tennessee 38152, United States
| | - Nghia Le
- Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - John Daniel McCool
- Department of Chemistry, University of Memphis, Memphis, Tennessee 38152, United States
| | - Bruno Donnadieu
- Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Alexander N Erickson
- Department of Chemistry, University of Memphis, Memphis, Tennessee 38152, United States
| | - Charles Edwin Webster
- Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Xuan Zhao
- Department of Chemistry, University of Memphis, Memphis, Tennessee 38152, United States
| |
Collapse
|
3
|
Aragón J, Sun S, Pascual D, Jaworski S, Lloret-Fillol J. Photoredox Activation of Inert Alkyl Chlorides for the Reductive Cross-Coupling with Aromatic Alkenes. Angew Chem Int Ed Engl 2022; 61:e202114365. [PMID: 35289039 DOI: 10.1002/anie.202114365] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Indexed: 11/08/2022]
Abstract
The inertness of chloroalkanes has precluded them as coupling partners for cross-coupling reactions. Herein we disclose a general strategy for the activation of inert alkyl chlorides through photoredox catalysis and their use as coupling partners with alkenes. The catalytic system is formed by [Ni(OTf)(Py2 Ts tacn)](OTf) (1Ni ), which is responsible for the Csp3 -Cl bond activation, and [Ir(NMe2 bpy)(ppy)2 ]PF6, (PCIr NMe2 ), which is the photoredox catalyst. Combined experimental and theoretical studies show an in situ photogenerated NiI intermediate ([Ni(Py2 Ts tacn)]+ ) which is catalytically competent for the Csp3 -Cl bond cleavage via a SN 2 mechanism for primary alkyl chlorides, forming carbon-centered free radicals, which react with the olefin leading to the formation of the Csp3 -Csp3 bond. These results suggest inert alkyl chlorides can be electrophiles for developing new intermolecular strategies in which low-valent aminopyridine nickel complexes act as key catalytic species.
Collapse
Affiliation(s)
- Jordi Aragón
- Institute of Chemical Research of Catalonia (ICIQ) Barcelona Institute of Science and Technology, Technology Avda. Països Catalans, 16, 43007, Tarragona, Spain.,Departament de Química Organica i Analítica, Universitat Rovira i Virgili, Carrer Marcel⋅lí Domingo s/n, 43007, Tarragona, Spain
| | - Suyun Sun
- Institute of Chemical Research of Catalonia (ICIQ) Barcelona Institute of Science and Technology, Technology Avda. Països Catalans, 16, 43007, Tarragona, Spain.,Departament de Química Organica i Analítica, Universitat Rovira i Virgili, Carrer Marcel⋅lí Domingo s/n, 43007, Tarragona, Spain
| | - David Pascual
- Institute of Chemical Research of Catalonia (ICIQ) Barcelona Institute of Science and Technology, Technology Avda. Països Catalans, 16, 43007, Tarragona, Spain.,Departament de Química Organica i Analítica, Universitat Rovira i Virgili, Carrer Marcel⋅lí Domingo s/n, 43007, Tarragona, Spain
| | - Sebastian Jaworski
- Institute of Chemical Research of Catalonia (ICIQ) Barcelona Institute of Science and Technology, Technology Avda. Països Catalans, 16, 43007, Tarragona, Spain
| | - Julio Lloret-Fillol
- Institute of Chemical Research of Catalonia (ICIQ) Barcelona Institute of Science and Technology, Technology Avda. Països Catalans, 16, 43007, Tarragona, Spain.,Institution for Research and Advanced Studies (ICREA), Passeig Lluís Companys, 23, 08010, Barcelona, Spain
| |
Collapse
|
4
|
Costentin C, Camara F, Fortage J, Collomb MN. Photoinduced Catalysis of Redox Reactions. Turnover Numbers, Turnover Frequency, and Limiting Processes: Kinetic Analysis and Application to Light-Driven Hydrogen Production. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01289] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Cyrille Costentin
- Univ Grenoble Alpes, DCM, CNRS, 38000 Grenoble, France
- Université Paris Cité, 75013 Paris, France
| | | | | | | |
Collapse
|
5
|
Karumban KS, Raut R, Gupta P, Muley A, Giri B, Kumbhakar S, Misra A, Maji S. Mononuclear cobalt(II) complexes with polypyridyl ligands: Synthesis, characterization, DNA interactions and in vitro cytotoxicity towards human cancer cells. J Inorg Biochem 2022; 233:111866. [DOI: 10.1016/j.jinorgbio.2022.111866] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 04/28/2022] [Accepted: 05/17/2022] [Indexed: 02/02/2023]
|
6
|
Casadevall C, Pascual D, Aragón J, Call A, Casitas A, Casademont-Reig I, Lloret-Fillol J. Light-driven reduction of aromatic olefins in aqueous media catalysed by aminopyridine cobalt complexes. Chem Sci 2022; 13:4270-4282. [PMID: 35509462 PMCID: PMC9006965 DOI: 10.1039/d1sc06608k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 03/09/2022] [Indexed: 12/15/2022] Open
Abstract
A catalytic system based on earth-abundant elements that efficiently hydrogenates aryl olefins using visible light as the driving-force and H2O as the sole hydrogen atom source is reported. The catalytic system involves a robust and well-defined aminopyridine cobalt complex and a heteroleptic Cu photoredox catalyst. The system shows the reduction of styrene in aqueous media with a remarkable selectivity (>20 000) versus water reduction (WR). Reactivity and mechanistic studies support the formation of a [Co–H] intermediate, which reacts with the olefin via a hydrogen atom transfer (HAT). Synthetically useful deuterium-labelled compounds can be straightforwardly obtained by replacing H2O with D2O. Moreover, the dual photocatalytic system and the photocatalytic conditions can be rationally designed to tune the selectivity for aryl olefin vs. aryl ketone reduction; not only by changing the structural and electronic properties of the cobalt catalysts, but also by modifying the reduction properties of the photoredox catalyst. A dual catalytic system based on earth-abundant elements reduces aryl olefins to alkanes in aqueous media under visible light. Mechanistic studies allow for rational tunning of the system for the selective reduction of aryl olefins vs ketones and vice versa.![]()
Collapse
Affiliation(s)
- Carla Casadevall
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology Avinguda Països Catalans 16 43007 Tarragona Spain
| | - David Pascual
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology Avinguda Països Catalans 16 43007 Tarragona Spain
| | - Jordi Aragón
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology Avinguda Països Catalans 16 43007 Tarragona Spain
| | - Arnau Call
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology Avinguda Països Catalans 16 43007 Tarragona Spain
| | - Alicia Casitas
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology Avinguda Països Catalans 16 43007 Tarragona Spain
| | - Irene Casademont-Reig
- Donostia International Physics Center (DIPC), Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU P.K. 1072 20080 Donostia Euskadi Spain
| | - Julio Lloret-Fillol
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology Avinguda Països Catalans 16 43007 Tarragona Spain .,Catalan Institution for Research and Advanced Studies (ICREA) Passeig Lluïs Companys, 23 08010 Barcelona Spain
| |
Collapse
|
7
|
Aragón J, Sun S, Pascual D, Jaworski S, Lloret‐Fillol J. Photoredox Activation of Inert Alkyl Chlorides for the Reductive Cross‐Coupling with Aromatic Alkenes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202114365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jordi Aragón
- Institute of Chemical Research of Catalonia (ICIQ) Barcelona Institute of Science and Technology Technology Avda. Països Catalans, 16 43007 Tarragona Spain
- Departament de Química Organica i Analítica Universitat Rovira i Virgili Carrer Marcel⋅lí Domingo s/n 43007 Tarragona Spain
| | - Suyun Sun
- Institute of Chemical Research of Catalonia (ICIQ) Barcelona Institute of Science and Technology Technology Avda. Països Catalans, 16 43007 Tarragona Spain
- Departament de Química Organica i Analítica Universitat Rovira i Virgili Carrer Marcel⋅lí Domingo s/n 43007 Tarragona Spain
| | - David Pascual
- Institute of Chemical Research of Catalonia (ICIQ) Barcelona Institute of Science and Technology Technology Avda. Països Catalans, 16 43007 Tarragona Spain
- Departament de Química Organica i Analítica Universitat Rovira i Virgili Carrer Marcel⋅lí Domingo s/n 43007 Tarragona Spain
| | - Sebastian Jaworski
- Institute of Chemical Research of Catalonia (ICIQ) Barcelona Institute of Science and Technology Technology Avda. Països Catalans, 16 43007 Tarragona Spain
| | - Julio Lloret‐Fillol
- Institute of Chemical Research of Catalonia (ICIQ) Barcelona Institute of Science and Technology Technology Avda. Països Catalans, 16 43007 Tarragona Spain
- Institution for Research and Advanced Studies (ICREA) Passeig Lluís Companys, 23 08010 Barcelona Spain
| |
Collapse
|
8
|
Karumban KS, Muley A, Giri B, Kumbhakar S, Kella T, Shee D, Maji S. Synthesis, characterization, structural, redox and electrocatalytic proton reduction properties of cobalt polypyridyl complexes. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2021.120637] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
|
9
|
Karumban KS, Muley A, Raut R, Gupta P, Giri B, Kumbhakar S, Misra A, Maji S. Mononuclear Co(II) polypyridyl complexes: synthesis, molecular structure, DNA binding/cleavage, radical scavenging, docking studies and anticancer activities. Dalton Trans 2022; 51:7084-7099. [DOI: 10.1039/d1dt04144d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mononuclear Co(II) complexes [CoII(L)Cl2]; 1, [CoII(L)(bpy)Cl]PF6; 2, [CoII(L)(phen)Cl]PF6; 3 and [CoII(L)(pic)Cl]; 4, (where L = N,N-bis(pyridin-2-ylmethyl)aniline, bpy = 2,2/-bipyridine, phen = 1,10-phenanthroline, pic = picolinic acid) were systematically synthesized and...
Collapse
|
10
|
Fernández S, Cañellas S, Franco F, Luis JM, Pericàs MÀ, Lloret‐Fillol J. The Dual Effect of Coordinating −NH Groups and Light in the Electrochemical CO
2
Reduction with Pyridylamino Co Complexes. ChemElectroChem 2021. [DOI: 10.1002/celc.202100859] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Sergio Fernández
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology (BIST) Av. Països Catalans 16 43007 Tarragona Spain
- Department de Química Física i Inorgànica Universitat Rovira i Virgili 43007 Tarragona Spain
| | - Santiago Cañellas
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology (BIST) Av. Països Catalans 16 43007 Tarragona Spain
| | - Federico Franco
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology (BIST) Av. Països Catalans 16 43007 Tarragona Spain
| | - Josep M. Luis
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química Universitat de Girona Campus Montilivi 17003 Girona Spain
| | - Miquel À. Pericàs
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology (BIST) Av. Països Catalans 16 43007 Tarragona Spain
- Departament de Química Inorgànica i Orgànica Universitat de Barcelona 08080 Barcelona Spain
| | - Julio Lloret‐Fillol
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology (BIST) Av. Països Catalans 16 43007 Tarragona Spain
- Catalan Institution for Research and Advanced Studies (ICREA) Passeig Lluís Companys 23 08010 Barcelona Spain
| |
Collapse
|
11
|
Recent progress in homogeneous light-driven hydrogen evolution using first-row transition metal catalysts. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2020.119950] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
12
|
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.
Collapse
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.
| | | | | | | | | | | | | |
Collapse
|
13
|
Wang P, Liang G, Webster CE, Zhao X. Structure‐Functional Analysis of Hydrogen Production Catalyzed by Molecular Cobalt Complexes with Pentadentate Ligands in Aqueous Solutions. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000564] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Ping Wang
- Department of Chemistry The University of Memphis 38152 Memphis Tennessee USA
| | - Guangchao Liang
- Department of Chemistry University of Michigan 48109 Ann Arbor Michigan USA
- Department of Chemistry Mississippi State University 39762 Starkville Mississippi USA
| | - Charles Edwin Webster
- Department of Chemistry Mississippi State University 39762 Starkville Mississippi USA
| | - Xuan Zhao
- Department of Chemistry The University of Memphis 38152 Memphis Tennessee USA
| |
Collapse
|
14
|
Kumar Padhi S, Ahmad E, Rai S, Panda B. Kinetics and mechanistic study of electrocatalytic hydrogen evolution by [Co(Fc-tpy)2]2+. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114677] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
15
|
Wang P, Liang G, Smith N, Hill K, Donnadieu B, Webster CE, Zhao X. Enhanced Hydrogen Evolution in Neutral Water Catalyzed by a Cobalt Complex with a Softer Polypyridyl Ligand. Angew Chem Int Ed Engl 2020; 59:12694-12697. [PMID: 32307871 DOI: 10.1002/anie.202002640] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 04/14/2020] [Indexed: 11/08/2022]
Abstract
To explore the structure-function relationships of cobalt complexes in the catalytic hydrogen evolution reaction (HER), we studied the substitution of a tertiary amine with a softer pyridine group and the inclusion of a conjugated bpy unit in a Co complex with a new pentadentate ligand, 6-[6-(1,1-di-pyridin-2-yl-ethyl)-pyridin-2-ylmethyl]-[2,2']bipyridinyl (Py3Me-Bpy). These modifications resulted in significantly improved stability and activity in both electro- and photocatalytic HER in neutral water. [Co(Py3Me-Bpy)(OH2 )](PF6 )2 catalyzes the electrolytic HER at -1.3 V (vs. SHE) for 20 hours with a turnover number (TON) of 266 300, and photolytic HER for two days with a TON of 15 000 in pH 7 aqueous solutions. The softer ligand scaffold possibly provides increased stability towards the intermediate CoI species. DFT calculations demonstrate that HER occurs through a general electron transfer/proton transfer/electron transfer/proton transfer pathway, with H2 released from the protonation of CoII -H species.
Collapse
Affiliation(s)
- Ping Wang
- Department of Chemistry, The University of Memphis, Memphis, TN, 38152, USA
| | - Guangchao Liang
- Department of Chemistry, Mississippi State University, Mississippi State, MS, 39762, USA
| | - Noah Smith
- Department of Chemistry & Physics, Arkansas State University, Jonesboro, AR, 72401, USA
| | - Kyra Hill
- Division of Science and Math, Rust College, Holly Springs, MS, 38635, USA
| | - Bruno Donnadieu
- Department of Chemistry, Mississippi State University, Mississippi State, MS, 39762, USA
| | - Charles Edwin Webster
- Department of Chemistry, Mississippi State University, Mississippi State, MS, 39762, USA
| | - Xuan Zhao
- Department of Chemistry, The University of Memphis, Memphis, TN, 38152, USA
| |
Collapse
|
16
|
Wang P, Liang G, Smith N, Hill K, Donnadieu B, Webster CE, Zhao X. Enhanced Hydrogen Evolution in Neutral Water Catalyzed by a Cobalt Complex with a Softer Polypyridyl Ligand. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202002640] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Ping Wang
- Department of Chemistry The University of Memphis Memphis TN 38152 USA
| | - Guangchao Liang
- Department of Chemistry Mississippi State University Mississippi State MS 39762 USA
| | - Noah Smith
- Department of Chemistry & Physics Arkansas State University Jonesboro AR 72401 USA
| | - Kyra Hill
- Division of Science and Math Rust College Holly Springs MS 38635 USA
| | - Bruno Donnadieu
- Department of Chemistry Mississippi State University Mississippi State MS 39762 USA
| | | | - Xuan Zhao
- Department of Chemistry The University of Memphis Memphis TN 38152 USA
| |
Collapse
|
17
|
|
18
|
Viertl W, Pann J, Pehn R, Roithmeyer H, Bendig M, Rodríguez-Villalón A, Bereiter R, Heiderscheid M, Müller T, Zhao X, Hofer TS, Thompson ME, Shi S, Brueggeller P. Performance of enhanced DuBois type water reduction catalysts (WRC) in artificial photosynthesis - effects of various proton relays during catalysis. Faraday Discuss 2019; 215:141-161. [PMID: 30942209 DOI: 10.1039/c8fd00162f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Inspired by natural photosynthesis, features such as proton relays have been integrated into water reduction catalysts (WRC) for effective production of hydrogen. Research by DuBois et al. showed the crucial influence of these relays, largely in the form of pendant amine functions. In this work catalysts are presented containing innovative diphosphinoamine ligands: [M(ii)Cl2(PNP-C1)], [M(ii)(MeCN)2(PNP-C1)]2+, [M(ii)(PNP-C1)2]2+, and [M(ii)Cl(PNP-C2)]+ (M = Pt2+, Pd2+, Ni2+, Co2+; PNP-C1 = N,N-bis{(di(2-methoxyphenyl)phosphino)methyl}-N-alkylamine, PNP-C2 = N,N-bis{(di(2-methoxyphenyl)phosphino)ethyl}-N-alkylamine and alkyl = Me, Et, iso-Pr, Bz). Synthetic strategies and detailed characterisation are covered, including 1H-, 13C-, and 31P-NMR analysis, mass spectroscopy and single crystal X-ray diffractometry (XRD). The catalytic properties have been explored by changing the pendant amines and auxiliary methoxy coordination sites, as well as enlarging the ligand backbone. Moreover, confirmed by density functional theory (DFT) calculations based on XRD data in vacuo and solvent environment, two very different catalytic cycles are proposed. PNP-C1 shows a classical proton relay, whereas PNP-C2 allows an additional coordination of nitrogen, acting optionally like a pincer. Through new insights into efficiency and stability-increasing influences of proton relays in general, their number per metal centre, an enlarged ligand backbone and the use of solvato instead of halogenido complexes, substantial improvements have been made in catalytic performance over the DuBois et al. catalysts and recently self-made WRCs. The turnover number (TON) related to the single site of cost-efficient nickel WRCs is increased from 11.4 to 637, whereas a corresponding palladium catalyst gives TON as high as 2289.
Collapse
Affiliation(s)
- Wolfgang Viertl
- University of Innsbruck, Centrum for Chemistry and Biomedicine, Institute of General, Inorganic and Theoretical Chemistry, Innrain 82, 6020 Innsbruck, Austria
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Call A, Casadevall C, Romero-Rivera A, Martin-Diaconescu V, Sommer DJ, Osuna S, Ghirlanda G, Lloret-Fillol J. Improved Electro- and Photocatalytic Water Reduction by Confined Cobalt Catalysts in Streptavidin. ACS Catal 2019. [DOI: 10.1021/acscatal.8b04981] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Arnau Call
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avinguda Països Catalans 16, 43007 Tarragona, Spain
| | - Carla Casadevall
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avinguda Països Catalans 16, 43007 Tarragona, Spain
| | - Adrian Romero-Rivera
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Carrer Maria Aurèlia Capmany 69, 17003 Girona, Spain
| | - Vlad Martin-Diaconescu
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avinguda Països Catalans 16, 43007 Tarragona, Spain
| | - Dayn J. Sommer
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Sílvia Osuna
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Carrer Maria Aurèlia Capmany 69, 17003 Girona, Spain
- Catalan Institution for Research and Advanced Studies (ICREA), Passeig Lluïs Companys, 23, 08010, Barcelona, Spain
| | - Giovanna Ghirlanda
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287-1604, United States
| | - Julio Lloret-Fillol
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avinguda Països Catalans 16, 43007 Tarragona, Spain
- Catalan Institution for Research and Advanced Studies (ICREA), Passeig Lluïs Companys, 23, 08010, Barcelona, Spain
| |
Collapse
|
20
|
Claros M, Ungeheuer F, Franco F, Martin‐Diaconescu V, Casitas A, Lloret‐Fillol J. Reductive Cyclization of Unactivated Alkyl Chlorides with Tethered Alkenes under Visible-Light Photoredox Catalysis. Angew Chem Int Ed Engl 2019; 58:4869-4874. [PMID: 30707782 PMCID: PMC6519206 DOI: 10.1002/anie.201812702] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 01/26/2019] [Indexed: 01/09/2023]
Abstract
The chemical inertness of abundant and commercially available alkyl chlorides precludes their widespread use as reactants in chemical transformations. Presented in this work is a metallaphotoredox methodology to achieve the catalytic intramolecular reductive cyclization of unactivated alkyl chlorides with tethered alkenes. The cleavage of strong C(sp3 )-Cl bonds is mediated by a highly nucleophilic low-valent cobalt or nickel intermediate generated by visible-light photoredox reduction employing a copper photosensitizer. The high basicity and multidentate nature of the ligands are key to obtaining efficient metal catalysts for the functionalization of unactivated alkyl chlorides.
Collapse
Affiliation(s)
- Miguel Claros
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and TechnologyAvda. Països Catalans, 1643007TarragonaSpain
| | - Felix Ungeheuer
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and TechnologyAvda. Països Catalans, 1643007TarragonaSpain
| | - Federico Franco
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and TechnologyAvda. Països Catalans, 1643007TarragonaSpain
| | - Vlad Martin‐Diaconescu
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and TechnologyAvda. Països Catalans, 1643007TarragonaSpain
| | - Alicia Casitas
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and TechnologyAvda. Països Catalans, 1643007TarragonaSpain
| | - Julio Lloret‐Fillol
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and TechnologyAvda. Països Catalans, 1643007TarragonaSpain
- Catalan Institution for Research and Advanced Studies (ICREA)Passeig Lluïs Companys, 2308010BarcelonaSpain
| |
Collapse
|
21
|
Claros M, Ungeheuer F, Franco F, Martin‐Diaconescu V, Casitas A, Lloret‐Fillol J. Reductive Cyclization of Unactivated Alkyl Chlorides with Tethered Alkenes under Visible‐Light Photoredox Catalysis. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201812702] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Miguel Claros
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and Technology Avda. Països Catalans, 16 43007 Tarragona Spain
| | - Felix Ungeheuer
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and Technology Avda. Països Catalans, 16 43007 Tarragona Spain
| | - Federico Franco
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and Technology Avda. Països Catalans, 16 43007 Tarragona Spain
| | - Vlad Martin‐Diaconescu
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and Technology Avda. Països Catalans, 16 43007 Tarragona Spain
| | - Alicia Casitas
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and Technology Avda. Països Catalans, 16 43007 Tarragona Spain
| | - Julio Lloret‐Fillol
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and Technology Avda. Països Catalans, 16 43007 Tarragona Spain
- Catalan Institution for Research and Advanced Studies (ICREA) Passeig Lluïs Companys, 23 08010 Barcelona Spain
| |
Collapse
|
22
|
Koshiba K, Yamauchi K, Sakai K. Consecutive ligand-based PCET processes affording a doubly reduced nickel pyrazinedithiolate which transforms into a metal hydride required to evolve H2. Dalton Trans 2019; 48:635-640. [DOI: 10.1039/c8dt04497j] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Consecutive Ligand-based PCET Processes Affording a Doubly Reduced Nickel Pyrazinedithiolate which Transforms into a Metal Hydride Required to Evolve H2.
Collapse
Affiliation(s)
- Keita Koshiba
- Department of Chemistry
- Faculty of Science
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - Kosei Yamauchi
- Department of Chemistry
- Faculty of Science
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - Ken Sakai
- Department of Chemistry
- Faculty of Science
- Kyushu University
- Fukuoka 819-0395
- Japan
| |
Collapse
|
23
|
Kankanamalage PHA, Ekanayake DM, Singh N, de Morais ACP, Mazumder S, Verani CN, Mukherjee A, Lanznaster M. Effect of ligand substituents on nickel and copper [N4] complexes: electronic and redox behavior, and reactivity towards protons. NEW J CHEM 2019. [DOI: 10.1039/c9nj01283d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ligand substituents have a major effect on the redox potentials, catalytic efficiency and robustness of the complexes in HER.
Collapse
Affiliation(s)
| | | | - Nirupama Singh
- Department of Chemistry
- University of Alabama
- Huntsville
- USA
| | | | - Shivnath Mazumder
- Department of Chemistry
- Indian Institute of Technology Jammu
- Jammu (J&K)
- India
| | | | | | | |
Collapse
|
24
|
Ranasinghe K, Marzilli PA, Pakhomova S, Marzilli LG. Linear Bidentate Ligands (L) with Two Terminal Pyridyl N-Donor Groups Forming Pt(II)LCl 2 Complexes with Rare Eight-Membered Chelate Rings. Inorg Chem 2018; 57:12756-12768. [PMID: 30281298 DOI: 10.1021/acs.inorgchem.8b01943] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
NMR and X-ray diffraction studies were conducted on Pt(II)LCl2 complexes prepared with the new N-donor ligands N(SO2R)Me ndpa (R = Me, Tol; n = 2, 4). These ligands differ from N(H)dpa (di-2-picolylamine) in having the central N within a tertiary sulfonamide group instead of a secondary amine group and having Me groups at the 6,6'-positions ( n = 2) or 3,3',5,5'-positions ( n = 4) of the pyridyl rings. The N(SO2R)3,3',5,5'-Me4dpa ligands are coordinated in a bidentate fashion in Pt( N(SO2R)3,3',5,5'-Me4dpa)Cl2 complexes, forming a rare eight-membered chelate ring. The sulfonamide N atom did not bind to Pt(II), consistent with indications in the literature that tertiary sulfonamides are unlikely to anchor two meridionally coordinated five-membered chelate rings in solutions of coordinating solvents. The N(SO2R)6,6'-Me2dpa ligands coordinate in a monodentate fashion to form the binuclear complexes [ trans-Pt(DMSO)Cl2]2( N(SO2R)6,6'-Me2dpa). The monodentate instead of bidentate N(SO2R)6,6'-Me2dpa coordination is attributed to 6,6'-Me steric bulk. These binuclear complexes are indefinitely stable in DMF- d7, but in DMSO- d6 the N(SO2R)6,6'-Me2dpa ligands dissociate completely. In DMSO- d6, the bidentate ligands in Pt( N(SO2R)3,3',5,5'-Me4dpa)Cl2 complexes also dissociate, but incompletely; these complexes provide rare examples of association-dissociation equilibria of N,N bidentate ligands in Pt(II) chemistry. Like typical cis-PtLCl2 complexes, the Pt( N(SO2R)3,3',5,5'-Me4dpa)Cl2 complexes undergo monosolvolysis in DMSO- d6 to form the [Pt( N(SO2R)3,3',5,5'-Me4dpa)(DMSO- d6)Cl]+ cations. However, unlike typical cis-PtLCl2 complexes, the Pt( N(SO2R)3,3',5,5'-Me4dpa)Cl2 complexes surprisingly do not react readily with the excellent N-donor bioligand guanosine. A comparison of the structural features of over 50 known relevant Pt(II) complexes having smaller chelate rings with those of the very few relevant Pt(II) complexes having eight-membered chelate rings indicates that the pyridyl rings in Pt( N(SO2R)3,3',5,5'-Me4dpa)Cl2 complexes are well positioned to form strong Pt-N bonds. Therefore, the dissociation of the bidentate ligand and the poor biomolecule reactivity of the Pt( N(SO2R)3,3',5,5'-Me4dpa)Cl2 complexes arise from steric consequences imposed by the -CH2-N(SO2R)-CH2- chain in the eight-membered chelate ring.
Collapse
Affiliation(s)
- Kokila Ranasinghe
- Department of Chemistry , Louisiana State University , Baton Rouge , Louisiana 70803 , United States
| | - Patricia A Marzilli
- Department of Chemistry , Louisiana State University , Baton Rouge , Louisiana 70803 , United States
| | - Svetlana Pakhomova
- Department of Chemistry , Louisiana State University , Baton Rouge , Louisiana 70803 , United States
| | - Luigi G Marzilli
- Department of Chemistry , Louisiana State University , Baton Rouge , Louisiana 70803 , United States
| |
Collapse
|
25
|
Chand Vagvala T, Ooyabe T, Sakai M, Funasako Y, Inokuchi M, Kurashige W, Negishi Y, Kalousek V, Ikeue K. Synthesis and characterization of metal-diaminobipyridine complexes as low-cost co-catalysts for photo-sensitized hydrogen evolution. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.07.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
26
|
Lei JM, Luo SP, Zhan SZ. A water soluble cocatalyst based on a cobalt(II) complex of S,S’-bis(2-pyridylmethyl)-1,2-thioethane for photochemical driven hydrogen evolution from water under visible light. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.07.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
27
|
Karabulut FNH, Feltham HLC, Brooker S. Substituents drive ligand rearrangements, giving dinuclear rather than mononuclear complexes, and tune Co II/III redox potential. Dalton Trans 2018; 47:11749-11759. [PMID: 29809223 DOI: 10.1039/c8dt01502c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three new tetradentate imine ligands, HLHBr, HLClH and HLBrH (HLR1R2) were synthesised by 2 : 1 condensation of the appropriately n-halo substituted pyridine-2-carboxaldehyde (5-bromo-4a, 6-bromo-4b or 6-chloro-4c) with 1,3-diaminopropan-2-ol (5). Reactions of each of these three ligands with one equivalent of cobalt(ii) tetrafluoroborate resulted in the formation of three N4O2 coordinated cobalt(ii) complexes: the anticipated mononuclear complex [CoII(HLHBr)(MeOH)2](BF4)2 (1), and two unexpected dinuclear complexes, [CoII2(LBrH-BF2OMe)]2(BF4)2 (2) and [CoII2(LClH-BF2OMe)]2(BF4)2 (3). Dinuclear 2 and 3 result from complexation of cobalt(ii) to the ligands derived from the sterically demanding 6-halo substituted pyridine-2-carboxaldehydes (4b and 4c) undergoing rearrangement, reacting with MeOH and a BF4 anion, resulting in a pair of borate ester bridges between the two cobalt(ii) centres. A similar type of rearrangement is proposed for the PF6 analogues. Cyclic voltammetry in acetonitrile reveals that cobalt(ii) complexes 1-3 undergo a quasi-reversible oxidation: Em = 0.57, 0.38 and 0.29 V vs. 0.01 AgNO3/Ag, respectively. The observed Em value is tuned by the ligand, with the 6-chloro-substituent leading to the lowest Em value being observed for the corresponding cobalt complex, 3, rather than for either of the complexes of the n-bromo-substituted ligands (n = 6 or 5), 2 and 1.
Collapse
Affiliation(s)
- Fabrice N H Karabulut
- Department of Chemistry and MacDiarmid Institute of Advanced Materials and Nanotechnology, University of Otago, PO Box 56, Dunedin 9054, New Zealand.
| | | | | |
Collapse
|
28
|
Hogue RW, Schott O, Hanan GS, Brooker S. A Smorgasbord of 17 Cobalt Complexes Active for Photocatalytic Hydrogen Evolution. Chemistry 2018; 24:9820-9832. [DOI: 10.1002/chem.201800396] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Indexed: 12/24/2022]
Affiliation(s)
- Ross W. Hogue
- Department of Chemistry and MacDiarmid Institute for, Advanced Materials and Nanotechnology; University of Otago; P.O. Box 56 Dunedin 9054 New Zealand
| | - Olivier Schott
- Département de Chimie; Université de Montréal; 2900 Boulevard Edouard-Montpetit Montréal Quebec H3T 1J4 Canada
| | - Garry S. Hanan
- Département de Chimie; Université de Montréal; 2900 Boulevard Edouard-Montpetit Montréal Quebec H3T 1J4 Canada
| | - Sally Brooker
- Department of Chemistry and MacDiarmid Institute for, Advanced Materials and Nanotechnology; University of Otago; P.O. Box 56 Dunedin 9054 New Zealand
| |
Collapse
|
29
|
Abstract
Obtaining abundant pure hydrogen by reduction of water has an important implication in the development of clean and renewable energy. Hence research focused on the development of non-noble metal based facile and energy efficient catalysts for proton reduction is on the rise. However, for practical utilization, it is necessary that these complexes function unabated in the presence of atmospheric oxygen and other common contaminants in abundant water sources. There has been very little activity towards the development of oxygen-tolerant hydrogen producing catalysts. This article aims to draw attention to this issue of oxygen sensitivity in the HER and highlights the development of a few air-stable HER catalysts (enzymatic as well as artificial) elaborating the challenges involved and the techniques discovered to overcome this significant deterrent to large-scale hydrogen production by electrolysis from abundant water sources.
Collapse
Affiliation(s)
- Biswajit Mondal
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, 2A&2B Raja S.C. Mullick Road, Jadavpur, Kolkata-700032, India.
| | | |
Collapse
|
30
|
Kap Z, Ülker E, Nune SVK, Karadas F. Electrocatalytic hydrogen evolution with cobalt–poly(4-vinylpyridine) metallopolymers. J APPL ELECTROCHEM 2018. [DOI: 10.1007/s10800-018-1152-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
|
31
|
Ilic S, Alherz A, Musgrave CB, Glusac KD. Thermodynamic and kinetic hydricities of metal-free hydrides. Chem Soc Rev 2018; 47:2809-2836. [DOI: 10.1039/c7cs00171a] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Thermodynamic and kinetic hydricities provide useful guidelines for the design of hydride donors with desirable properties for catalytic chemical reductions.
Collapse
Affiliation(s)
- Stefan Ilic
- Department of Chemistry
- University of Illinois at Chicago
- Chicago
- USA
- Chemical Sciences and Engineering Division
| | - Abdulaziz Alherz
- Department of Chemical and Biological Engineering
- University of Colorado
- Boulder
- USA
| | - Charles B. Musgrave
- Department of Chemical and Biological Engineering
- University of Colorado
- Boulder
- USA
- Department of Chemistry and Biochemistry
| | - Ksenija D. Glusac
- Department of Chemistry
- University of Illinois at Chicago
- Chicago
- USA
- Chemical Sciences and Engineering Division
| |
Collapse
|
32
|
Call A, Lloret-Fillol J. Enhancement and control of the selectivity in light-driven ketone versus water reduction using aminopyridine cobalt complexes. Chem Commun (Camb) 2018; 54:9643-9646. [DOI: 10.1039/c8cc04239j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly selective light-driven reduction of aromatic ketones versus water reduction could be achieved by ligand design.
Collapse
Affiliation(s)
- Arnau Call
- Institute of Chemical Research of Catalonia (ICIQ)
- The Barcelona Institute of Science and Technology
- Avinguda Països Catalans 16
- 43007 Tarragona
- Spain
| | - Julio Lloret-Fillol
- Institute of Chemical Research of Catalonia (ICIQ)
- The Barcelona Institute of Science and Technology
- Avinguda Països Catalans 16
- 43007 Tarragona
- Spain
| |
Collapse
|
33
|
Call A, Franco F, Kandoth N, Fernández S, González-Béjar M, Pérez-Prieto J, Luis JM, Lloret-Fillol J. Understanding light-driven H 2 evolution through the electronic tuning of aminopyridine cobalt complexes. Chem Sci 2017; 9:2609-2619. [PMID: 29675253 PMCID: PMC5892349 DOI: 10.1039/c7sc04328g] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Accepted: 12/18/2017] [Indexed: 11/25/2022] Open
Abstract
Electronic effects provide a general mechanistic scenario for rationalizing photocatalytic water reduction activity with aminopyridine cobalt complexes.
A new family of cobalt complexes with the general formula [CoII(OTf)2(Y,XPyMetacn)] (1R, Y,XPyMetacn = 1-[(4-X-3,5-Y-2-pyridyl)methyl]-4,7-dimethyl-1,4,7-triazacyclononane, (X = CN (1CN), CO2Et (1CO2Et), Cl (1Cl), H (1H), NMe2 (1NMe2)) where (Y = H, and X = OMe when Y = Me (1DMM)) is reported. We found that the electronic tuning of the Y,XPyMetacn ligand not only has an impact on the electronic and structural properties of the metal center, but also allows for a systematic water-reduction-catalytic control. In particular, the increase of the electron-withdrawing character of the pyridine moiety promotes a 20-fold enhancement of the catalytic outcome. By UV-Vis spectroscopy, luminescence quenching studies and Transient Absorption Spectroscopy (TAS), we have studied the direct reaction of the photogenerated [IrIII(ppy)2(bpy˙–)] (PSIr) species to form the elusive CoI intermediates. In particular, our attention is focused on the effect of the ligand architecture in this elemental step of the catalytic mechanism. Finally, kinetic isotopic experiments together with DFT calculations provide complementary information about the rate-determining step of the catalytic cycle.
Collapse
Affiliation(s)
- Arnau Call
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Avinguda Països Catalans 16 , 43007 Tarragona , Spain .
| | - Federico Franco
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Avinguda Països Catalans 16 , 43007 Tarragona , Spain .
| | - Noufal Kandoth
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Avinguda Països Catalans 16 , 43007 Tarragona , Spain .
| | - Sergio Fernández
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Avinguda Països Catalans 16 , 43007 Tarragona , Spain .
| | - María González-Béjar
- Instituto de Ciencia Molecular (ICMol) , Universidad de Valencia , C/Catedrático José Beltrán 2, Paterna , E46980 Valencia , Spain
| | - Julia Pérez-Prieto
- Instituto de Ciencia Molecular (ICMol) , Universidad de Valencia , C/Catedrático José Beltrán 2, Paterna , E46980 Valencia , Spain
| | - Josep M Luis
- Institut de Química Computacional i Catàlisi (IQCC) , Departament de Química , Universitat de Girona , Campus Montilivi , E17071 Girona , Catalonia , Spain
| | - Julio Lloret-Fillol
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Avinguda Països Catalans 16 , 43007 Tarragona , Spain . .,Catalan Institution for Research and Advanced Studies (ICREA) , Passeig Lluïs Companys, 23 , 08010 , Barcelona , Spain
| |
Collapse
|
34
|
Deshmukh MS, Mane VS, Kumbhar AS, Boomishankar R. Light-driven Hydrogen Evolution from Water by a Tripodal Silane Based CoII6L18 Octahedral Cage. Inorg Chem 2017; 56:13286-13292. [DOI: 10.1021/acs.inorgchem.7b02074] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
| | - Vishwanath S. Mane
- Department
of Chemistry, Savitribai Phule Pune University, Pune 411007, India
| | - Avinash S. Kumbhar
- Department
of Chemistry, Savitribai Phule Pune University, Pune 411007, India
| | | |
Collapse
|
35
|
Ahmad E, Majee K, Patel J, Das B, Padhi SK. Competent Electrocatalytic and Photocatalytic Proton Reduction by a Dechelated [Co(tpy)2
]2+
Scaffold. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700628] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ejaz Ahmad
- Artificial Photosynthesis Laboratory; Department of Applied Chemistry; Indian Institute of Technology (Indian School of Mines) Dhanbad; 826004 Jharkhand India
| | - Karunamay Majee
- Artificial Photosynthesis Laboratory; Department of Applied Chemistry; Indian Institute of Technology (Indian School of Mines) Dhanbad; 826004 Jharkhand India
| | - Jully Patel
- Artificial Photosynthesis Laboratory; Department of Applied Chemistry; Indian Institute of Technology (Indian School of Mines) Dhanbad; 826004 Jharkhand India
| | - Babulal Das
- Department of Chemistry; Indian Institute of Technology Guwahati; 781039 Assam India
| | - Sumanta Kumar Padhi
- Artificial Photosynthesis Laboratory; Department of Applied Chemistry; Indian Institute of Technology (Indian School of Mines) Dhanbad; 826004 Jharkhand India
| |
Collapse
|
36
|
Call A, Casadevall C, Acuña-Parés F, Casitas A, Lloret-Fillol J. Dual cobalt-copper light-driven catalytic reduction of aldehydes and aromatic ketones in aqueous media. Chem Sci 2017; 8:4739-4749. [PMID: 30155221 PMCID: PMC6100254 DOI: 10.1039/c7sc01276d] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 05/04/2017] [Indexed: 12/11/2022] Open
Abstract
A dual catalytic system based on earth-abundant elements reduces aromatic ketones and aldehydes to alcohols in aqueous media under visible light. An unprecedented selectivity for the reduction of aromatic ketones versus aliphatic aldehydes is reported.
We present an efficient, general, fast, and robust light-driven methodology based on earth-abundant elements to reduce aryl ketones, and both aryl and aliphatic aldehydes (up to 1400 TON). The catalytic system consists of a robust and well-defined aminopyridyl cobalt complex active for photocatalytic water reduction and the [Cu(bathocuproine)(Xantphos)](PF6) photoredox catalyst. The dual cobalt–copper system uses visible light as the driving-force and H2O and an electron donor (Et3N or iPr2EtN) as the hydride source. The catalytic system operates in aqueous mixtures (80–60% water) with high selectivity towards the reduction of organic substrates (>2000) vs. water reduction, and tolerates O2. High selectivity towards the hydrogenation of aryl ketones is observed in the presence of terminal olefins, aliphatic ketones, and alkynes. Remarkably, the catalytic system also shows unique selectivity for the reduction of acetophenone in the presence of aliphatic aldehydes. The catalytic system provides a simple and convenient method to obtain α,β-deuterated alcohols. Both the observed reactivity and the DFT modelling support a common cobalt hydride intermediate. The DFT modelled energy profile for the [Co–H] nucleophilic attack to acetophenone and water rationalises the competence of [CoII–H] to reduce acetophenone in the presence of water. Mechanistic studies suggest alternative mechanisms depending on the redox potential of the substrate. These results show the potential of the water reduction catalyst [Co(OTf)(Py2Tstacn)](OTf) (1), (Py2Tstacn = 1,4-di(picolyl)-7-(p-toluenesulfonyl)-1,4,7-triazacyclononane, OTf = trifluoromethanesulfonate anion) to develop light-driven selective organic transformations and fine solar chemicals.
Collapse
Affiliation(s)
- Arnau Call
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Avinguda Països Catalans 16 , 43007 Tarragona , Spain .
| | - Carla Casadevall
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Avinguda Països Catalans 16 , 43007 Tarragona , Spain .
| | - Ferran Acuña-Parés
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Avinguda Països Catalans 16 , 43007 Tarragona , Spain .
| | - Alicia Casitas
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Avinguda Països Catalans 16 , 43007 Tarragona , Spain .
| | - Julio Lloret-Fillol
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Avinguda Països Catalans 16 , 43007 Tarragona , Spain . .,Catalan Institution for Research and Advanced Studies (ICREA) , Passeig Lluïs Companys, 23 , 08010 , Barcelona , Spain
| |
Collapse
|
37
|
Waldie KM, Kim S, Ingram AJ, Waymouth RM. Cyclopentadienyl Cobalt Complexes as Precatalysts for Electrocatalytic Hydrogen Evolution. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700188] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Kate M. Waldie
- Department of Chemistry Stanford University 94305 Stanford CA USA
| | - Sung‐Kwan Kim
- Department of Chemistry Stanford University 94305 Stanford CA USA
| | - Andrew J. Ingram
- Department of Chemistry Stanford University 94305 Stanford CA USA
| | | |
Collapse
|
38
|
Baydoun H, Mazumder S, Schlegel HB, Verani CN. Deactivation of a Cobalt Catalyst for Water Reduction through Valence Tautomerism. Chemistry 2017; 23:9266-9271. [DOI: 10.1002/chem.201701783] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Indexed: 11/12/2022]
Affiliation(s)
- Habib Baydoun
- Department of Chemistry Wayne State University 5101 Cass Ave Detroit MI 48202 USA
| | - Shivnath Mazumder
- Department of Chemistry Wayne State University 5101 Cass Ave Detroit MI 48202 USA
- Current address: Department of Chemistry Hofstra University Berliner Hall Hempstead NY 11549 USA
| | - H. Bernhard Schlegel
- Department of Chemistry Wayne State University 5101 Cass Ave Detroit MI 48202 USA
| | - Cláudio N. Verani
- Department of Chemistry Wayne State University 5101 Cass Ave Detroit MI 48202 USA
| |
Collapse
|
39
|
Koshiba K, Yamauchi K, Sakai K. A Nickel Dithiolate Water Reduction Catalyst Providing Ligand-Based Proton-Coupled Electron-Transfer Pathways. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201700927] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Keita Koshiba
- Department of Chemistry; Faculty of Science; Kyushu University; Motooka 744, Nishi-ku Fukuoka 819-0395 Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER); Kyushu University; Japan
| | - Kosei Yamauchi
- Department of Chemistry; Faculty of Science; Kyushu University; Motooka 744, Nishi-ku Fukuoka 819-0395 Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER); Kyushu University; Japan
| | - Ken Sakai
- Department of Chemistry; Faculty of Science; Kyushu University; Motooka 744, Nishi-ku Fukuoka 819-0395 Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER); Kyushu University; Japan
- Center for Molecular Systems (CMS); Kyushu University; Japan
| |
Collapse
|
40
|
Koshiba K, Yamauchi K, Sakai K. A Nickel Dithiolate Water Reduction Catalyst Providing Ligand-Based Proton-Coupled Electron-Transfer Pathways. Angew Chem Int Ed Engl 2017; 56:4247-4251. [PMID: 28276659 DOI: 10.1002/anie.201700927] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Indexed: 12/22/2022]
Abstract
A nickel pyrazinedithiolate ([Ni(dcpdt)2 ]2- ; dcpdt=5,6-dicyanopyrazine-2,3-dithiolate), bearing a NiS4 core similar to the active center of [NiFe] hydrogenase, is shown to serve as an efficient molecular catalyst for the hydrogen evolution reaction (HER). This catalyst shows effectively low overpotentials for HER (330-400 mV at pH 4-6). Moreover, the turnover number of catalysis reaches 20 000 over the 24 h electrolysis with a high Faradaic efficiency, 92-100 %. The electrochemical and DFT studies reveal that diprotonated one-electron-reduced species (i.e., [NiII (dcpdt)(dcpdtH2 )]- or [NiII (dcpdtH)2 ]- ) forms at pH<6.4 via ligand-based proton-coupled electron-transfer (PCET) pathways, leading to electrocatalytic HER without applying the highly negative potential required to generate low-valent nickel intermediates. This is the first example of catalysts exhibiting such behavior.
Collapse
Affiliation(s)
- Keita Koshiba
- Department of Chemistry, Faculty of Science, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan.,International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Japan
| | - Kosei Yamauchi
- Department of Chemistry, Faculty of Science, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan.,International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Japan
| | - Ken Sakai
- Department of Chemistry, Faculty of Science, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan.,International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Japan.,Center for Molecular Systems (CMS), Kyushu University, Japan
| |
Collapse
|
41
|
Song XW, Meng Y, Zhang CL, Ma CB, Chen CN. A cobalt complex of a pentadentate aminopyridine ligand as an efficient catalyst for photocatalytic hydrogen generation. INORG CHEM COMMUN 2017. [DOI: 10.1016/j.inoche.2017.01.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
42
|
Carmo dos Santos NA, Natali M, Badetti E, Wurst K, Licini G, Zonta C. Cobalt, nickel, and iron complexes of 8-hydroxyquinoline-di(2-picolyl)amine for light-driven hydrogen evolution. Dalton Trans 2017; 46:16455-16464. [DOI: 10.1039/c7dt02666h] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Novel first-row transition metal complexes based on the 8-hydroxyquinoline-di(2-picolyl)amine ligand were prepared and tested as potential HECs in light-driven experiments.
Collapse
Affiliation(s)
| | - Mirco Natali
- Department of Chemical and Pharmaceutical Sciences
- University of Ferrara
- and Centro Interuniversitario per la Conversione Chimica dell'Energia Solare (SolarChem)
- sez. di Ferrara
- 44121 Ferrara
| | - Elena Badetti
- Department of Chemical Sciences
- University of Padova
- 35131 Padova
- Italy
| | - Klaus Wurst
- Institute of General
- Inorganic and Theoretical Chemistry
- University of Innsbruck
- A-6020 Innsbruck
- Austria
| | - Giulia Licini
- Department of Chemical Sciences
- University of Padova
- 35131 Padova
- Italy
| | - Cristiano Zonta
- Department of Chemical Sciences
- University of Padova
- 35131 Padova
- Italy
| |
Collapse
|
43
|
Mase K, Aoi S, Ohkubo K, Fukuzumi S. Catalytic reduction of proton, oxygen and carbon dioxide with cobalt macrocyclic complexes. J PORPHYR PHTHALOCYA 2016. [DOI: 10.1142/s1088424616300111] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The conversion of solar energy into chemical energy by the reduction of small molecules provides a promising solution for the effective energy storage and transport. In this manuscript, we have highlighted our recent researches on the catalysis of cobalt-macrocycle complexes for the reduction of O2, proton and CO2. We have successfully clarified the reaction mechanisms of catalytic O2 reduction with cobalt phthalocyanine (Co[Formula: see text](Pc)) and cobalt chlorin (Co[Formula: see text](Ch)) based on detailed kinetic study under homogeneous conditions. The presence of proton-accepting moieties on these macrocyclic ligands enhances the electron-accepting ability, leading to the efficient catalytic two-electron reduction of O2 to produce hydrogen peroxide (H2O[Formula: see text] with high stability and less overpotential in acidic solutions. When Co[Formula: see text](Ch) is adsorbed on multi-walled carbon nanotubes (MWCNTs) and employed as an electrocatalyst, CO2 was successfully reduced to form CO with a Faradaic efficiency of 89% at an applied potential of -1.1 V vs. NHE in an aqueous solution. Finally, photocatalytic H2 evolution was attained from ascorbic acid with Co[Formula: see text](Ch) as a catalyst and [Ru(bpy)3][Formula: see text] (bpy [Formula: see text] 2,2[Formula: see text]-bipyridine) as a photocatalyst via a one-photon two-electron process.
Collapse
Affiliation(s)
- Kentaro Mase
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Shoko Aoi
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Kei Ohkubo
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
- Division of Innovative Research for Drug Design, Institute of Academic Initiatives, Osaka University, Suita, Osaka 565-0871, Japan
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Korea
| | - Shunichi Fukuzumi
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Korea
- Faculty of Science and Engineering, Meijo University, SENTAN, Japan Science and Technology Agency (JST), Nagoya, Aichi 468-0073, Japan
| |
Collapse
|
44
|
Zhao X, Wang P, Long M. Electro- and Photocatalytic Hydrogen Production by Molecular Cobalt Complexes With Pentadentate Ligands. COMMENT INORG CHEM 2016. [DOI: 10.1080/02603594.2016.1266618] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Xuan Zhao
- Department of Chemistry, University of Memphis, Memphis, Tennessee, USA
| | - Ping Wang
- Department of Chemistry, University of Memphis, Memphis, Tennessee, USA
| | - Melissa Long
- Department of Chemistry, University of Memphis, Memphis, Tennessee, USA
| |
Collapse
|
45
|
Casadevall C, Codolà Z, Costas M, Lloret-Fillol J. Spectroscopic, Electrochemical and Computational Characterisation of Ru Species Involved in Catalytic Water Oxidation: Evidence for a [Ru(V) (O)(Py2 (Me) tacn)] Intermediate. Chemistry 2016; 22:10111-26. [PMID: 27324949 DOI: 10.1002/chem.201600584] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2016] [Indexed: 01/09/2023]
Abstract
A new family of ruthenium complexes based on the N-pentadentate ligand Py2 (Me) tacn (N-methyl-N',N''-bis(2-picolyl)-1,4,7-triazacyclononane) has been synthesised and its catalytic activity has been studied in the water-oxidation (WO) reaction. We have used chemical oxidants (ceric ammonium nitrate and NaIO4 ) to generate the WO intermediates [Ru(II) (OH2 )(Py2 (Me) tacn)](2+) , [Ru(III) (OH2 )(Py2 (Me) tacn)](3+) , [Ru(III) (OH)(Py2 (Me) tacn)](2+) and [Ru(IV) (O)(Py2 (Me) tacn)](2+) , which have been characterised spectroscopically. Their relative redox and pH stability in water has been studied by using UV/Vis and NMR spectroscopies, HRMS and spectroelectrochemistry. [Ru(IV) (O)(Py2 (Me) tacn)](2+) has a long half-life (>48 h) in water. The catalytic cycle of WO has been elucidated by using kinetic, spectroscopic, (18) O-labelling and theoretical studies, and the conclusion is that the rate-determining step is a single-site water nucleophilic attack on a metal-oxo species. Moreover, [Ru(IV) (O)(Py2 (Me) tacn)](2+) is proposed to be the resting state under catalytic conditions. By monitoring Ce(IV) consumption, we found that the O2 evolution rate is redox-controlled and independent of the initial concentration of Ce(IV) . Based on these facts, we propose herein that [Ru(IV) (O)(Py2 (Me) tacn)](2+) is oxidised to [Ru(V) (O)(Py2 (Me) tacn)](2+) prior to attack by a water molecule to give [Ru(III) (OOH)(Py2 (Me) tacn)](2+) . Finally, it is shown that the difference in WO reactivity between the homologous iron and ruthenium [M(OH2 )(Py2 (Me) tacn)](2+) (M=Ru, Fe) complexes is due to the difference in the redox stability of the key M(V) (O) intermediate. These results contribute to a better understanding of the WO mechanism and the differences between iron and ruthenium complexes in WO reactions.
Collapse
Affiliation(s)
- Carla Casadevall
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avinguda Països Catalans 16, 43007, Tarragona, Spain
| | - Zoel Codolà
- Institut de Química Computacional i Catàlisi (IQCC) and, Departament de Química, Universitat de Girona Campus Montilivi, 17071, Girona, Spain
| | - Miquel Costas
- Institut de Química Computacional i Catàlisi (IQCC) and, Departament de Química, Universitat de Girona Campus Montilivi, 17071, Girona, Spain
| | - Julio Lloret-Fillol
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avinguda Països Catalans 16, 43007, Tarragona, Spain.
- Catalan Institution for Research and Advanced Studies (ICREA), Passeig Lluïs Companys, 23, 08010, Barcelona, Spain.
| |
Collapse
|
46
|
Abstract
Transition metal hydride complexes are usually amphoteric, not only acting as hydride donors, but also as Brønsted-Lowry acids. A simple additive ligand acidity constant equation (LAC for short) allows the estimation of the acid dissociation constant Ka(LAC) of diamagnetic transition metal hydride and dihydrogen complexes. It is remarkably successful in systematizing diverse reports of over 450 reactions of acids with metal complexes and bases with metal hydrides and dihydrogen complexes, including catalytic cycles where these reactions are proposed or observed. There are links between pKa(LAC) and pKa(THF), pKa(DCM), pKa(MeCN) for neutral and cationic acids. For the groups from chromium to nickel, tables are provided that order the acidity of metal hydride and dihydrogen complexes from most acidic (pKa(LAC) -18) to least acidic (pKa(LAC) 50). Figures are constructed showing metal acids above the solvent pKa scales and organic acids below to summarize a large amount of information. Acid-base features are analyzed for catalysts from chromium to gold for ionic hydrogenations, bifunctional catalysts for hydrogen oxidation and evolution electrocatalysis, H/D exchange, olefin hydrogenation and isomerization, hydrogenation of ketones, aldehydes, imines, and carbon dioxide, hydrogenases and their model complexes, and palladium catalysts with hydride intermediates.
Collapse
Affiliation(s)
- Robert H Morris
- Department of Chemistry, University of Toronto , 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
| |
Collapse
|
47
|
Song LC, Luo FX, Liu BB, Gu ZC, Tan H. Novel Ruthenium Phthalocyanine-Containing Model Complex for the Active Site of [FeFe]-Hydrogenases: Synthesis, Structural Characterization, and Catalytic H2 Evolution. Organometallics 2016. [DOI: 10.1021/acs.organomet.5b01040] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Li-Cheng Song
- Department of Chemistry, State Key Laboratory of Elemento-Organic
Chemistry, and ‡Collaborative Innovation Center of Chemical Science and Engineering
(Tianjin), Nankai University, Tianjin 300071, China
| | - Fei-Xian Luo
- Department of Chemistry, State Key Laboratory of Elemento-Organic
Chemistry, and ‡Collaborative Innovation Center of Chemical Science and Engineering
(Tianjin), Nankai University, Tianjin 300071, China
| | - Bei-Bei Liu
- Department of Chemistry, State Key Laboratory of Elemento-Organic
Chemistry, and ‡Collaborative Innovation Center of Chemical Science and Engineering
(Tianjin), Nankai University, Tianjin 300071, China
| | - Zhen-Chao Gu
- Department of Chemistry, State Key Laboratory of Elemento-Organic
Chemistry, and ‡Collaborative Innovation Center of Chemical Science and Engineering
(Tianjin), Nankai University, Tianjin 300071, China
| | - Hao Tan
- Department of Chemistry, State Key Laboratory of Elemento-Organic
Chemistry, and ‡Collaborative Innovation Center of Chemical Science and Engineering
(Tianjin), Nankai University, Tianjin 300071, China
| |
Collapse
|
48
|
Natali M, Badetti E, Deponti E, Gamberoni M, Scaramuzzo FA, Sartorel A, Zonta C. Photoinduced hydrogen evolution with new tetradentate cobalt(ii) complexes based on the TPMA ligand. Dalton Trans 2016; 45:14764-73. [DOI: 10.1039/c6dt01705c] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
New cobalt(ii) complexes based on the TPMA ligand have been synthesized and characterized as molecular catalysts for photoinduced hydrogen evolution.
Collapse
Affiliation(s)
- Mirco Natali
- Department of Chemical and Pharmaceutical Sciences
- University of Ferrara
- 44121 Ferrara
- Italy
- Centro Interuniversitario per la Conversione Chimica dell'Energia Solare (SolarChem)
| | - Elena Badetti
- Department of Chemical Sciences
- University of Padova
- 35131 Padova
- Italy
| | - Elisa Deponti
- Department of Chemical and Pharmaceutical Sciences
- University of Ferrara
- 44121 Ferrara
- Italy
- Centro Interuniversitario per la Conversione Chimica dell'Energia Solare (SolarChem)
| | - Marta Gamberoni
- Department of Chemical and Pharmaceutical Sciences
- University of Ferrara
- 44121 Ferrara
- Italy
- Centro Interuniversitario per la Conversione Chimica dell'Energia Solare (SolarChem)
| | | | - Andrea Sartorel
- Department of Chemical Sciences
- University of Padova
- 35131 Padova
- Italy
| | - Cristiano Zonta
- Department of Chemical Sciences
- University of Padova
- 35131 Padova
- Italy
| |
Collapse
|
49
|
Ye K, Li YY, Liao RZ. DFT study of the mechanism of hydrogen evolution catalysed by molecular Ni, Co and Fe catalysts containing a diamine–tripyridine ligand. RSC Adv 2016. [DOI: 10.1039/c6ra20721a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Electrolysis of water to obtain hydrogen is a practical way to transform surplus electrical power into clean and sustainable hydrogen fuels.
Collapse
Affiliation(s)
- Ke Ye
- Key Laboratory of Material Chemistry for Energy Conversion and Storage
- Ministry of Education
- Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica
- Hubei Key Laboratory of Materials Chemistry and Service Failure
- School of Chemistry and Chemical Engineering
| | - Ying-Ying Li
- Key Laboratory of Material Chemistry for Energy Conversion and Storage
- Ministry of Education
- Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica
- Hubei Key Laboratory of Materials Chemistry and Service Failure
- School of Chemistry and Chemical Engineering
| | - Rong-Zhen Liao
- Key Laboratory of Material Chemistry for Energy Conversion and Storage
- Ministry of Education
- Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica
- Hubei Key Laboratory of Materials Chemistry and Service Failure
- School of Chemistry and Chemical Engineering
| |
Collapse
|
50
|
Kankanamalage PHA, Mazumder S, Tiwari V, Kpogo KK, Bernhard Schlegel H, Verani CN. Efficient electro/photocatalytic water reduction using a [NiII(N2Py3)]2+ complex. Chem Commun (Camb) 2016; 52:13357-13360. [DOI: 10.1039/c6cc06629a] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A nickel-based electro/photocatalyst acts efficiently toward water reduction with a remarkable TON of 3500. Involvement of the ligand-reduced [NiIL˙] species is proposed.
Collapse
|