1
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Grundmann NS, Heydari N, Jäggi SI, Blacque O, Alberto R. Optimizing Photocatalytic H 2 Production by Introduction of Pyrazinyls to WRCs and a New tris-Rhenium Photosensitizer. Chemistry 2024; 30:e202401595. [PMID: 38818937 DOI: 10.1002/chem.202401595] [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: 04/23/2024] [Revised: 05/27/2024] [Accepted: 05/31/2024] [Indexed: 06/01/2024]
Abstract
The replacement of pyridyl by pyrazinyl in ligands of polypyridyl-based cobalt water reducing catalysts (WRC) shifts reduction potentials anodically. Together with a new, trinuclear ReI photosensitizer, these WRCs show strongly improved photocatalytic performances in turnover numbers (TONs) and maximal H2 evolution rate. Depending on the catalyst structure, up to 65 kTONs at 1 μM WRC concentration were reached. Under electrocatalytic conditions in both DMF and H2O, one of the reported WRCs displays remarkable stability, producing H2 steadily over 21 and 14 d, respectively.
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Affiliation(s)
- Nora S Grundmann
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, Switzerland
| | - Neda Heydari
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, Switzerland
- Department of Chemistry, Faculty of Science, University of Zanjan, 45371-38791, Zanjan, Iran
| | - Sarah I Jäggi
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, Switzerland
| | - Olivier Blacque
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, Switzerland
| | - Roger Alberto
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, Switzerland
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2
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Brands M, Reek JNH. Mechanistic Insights into Electrocatalytic Hydrogen Evolution by an Exceptionally Stable Cobalt Complex. Inorg Chem 2024; 63:8484-8492. [PMID: 38640469 PMCID: PMC11080059 DOI: 10.1021/acs.inorgchem.4c01043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 04/05/2024] [Accepted: 04/09/2024] [Indexed: 04/21/2024]
Abstract
Co(aPPy) is one of the most stable and active molecular first-row transition-metal catalysts for proton reduction reported to date. Understanding the origin of its high performance via mechanistic studies could aid in developing even better catalysts. In this work, the catalytic mechanism of Co(aPPy) was electrochemically probed, in both organic solvents and water. We found that different mechanisms can occur depending on the solvent and the acidity of the medium. In organic solvent with a strong acid as the proton source, catalysis initiates directly after a single-electron reduction of CoII to CoI, whereas in the presence of a weaker acid, the cobalt center needs to be reduced twice before catalysis occurs. In the aqueous phase, we found drastically different electrochemical behavior, where the Co(aPPy) complex was found to be a precatalyst to a different electrocatalytic species. We propose that in this active catalyst, the pyridine ring has dissociated and acts as a proton relay at pH ≤ 5, which opens up a fast protonation pathway of the CoI intermediate and results in a high catalytic activity. Furthermore, we determined with constant potential bulk electrolysis that the catalyst is most stable at pH 3. The catalyst thus functions optimally at low pH in an aqueous environment, where the pyridine acts as a proton shuttle and where the high acidity also prevents catalyst deactivation.
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Affiliation(s)
- Maria
B. Brands
- Homogeneous, Supramolecular and Bio-inspired
Catalysis, Van ‘t Hoff Institute
for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Joost N. H. Reek
- Homogeneous, Supramolecular and Bio-inspired
Catalysis, Van ‘t Hoff Institute
for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
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3
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Peng X, Zhang M, Qin H, Han J, Xu Y, Li W, Zhang XP, Zhang W, Apfel UP, Cao R. Switching Electrocatalytic Hydrogen Evolution Pathways through Electronic Tuning of Copper Porphyrins. Angew Chem Int Ed Engl 2024; 63:e202401074. [PMID: 38311965 DOI: 10.1002/anie.202401074] [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: 01/16/2024] [Revised: 02/02/2024] [Accepted: 02/03/2024] [Indexed: 02/06/2024]
Abstract
The electronic structure of metal complexes plays key roles in determining their catalytic features. However, controlling electronic structures to regulate reaction mechanisms is of fundamental interest but has been rarely presented. Herein, we report electronic tuning of Cu porphyrins to switch pathways of the hydrogen evolution reaction (HER). Through controllable and regioselective β-oxidation of Cu porphyrin 1, we synthesized analogues 2-4 with one or two β-lactone groups in either a cis or trans configuration. Complexes 1-4 have the same Cu-N4 core site but different electronic structures. Although β-oxidation led to large anodic shifts of reductions, 1-4 displayed similar HER activities in terms of close overpotentials. With electrochemical, chemical and theoretical results, we show that the catalytically active species switches from a CuI species for 1 to a Cu0 species for 4. This work is thus significant to present mechanism-controllable HER via electronic tuning of catalysts.
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Affiliation(s)
- Xinyang Peng
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Mengchun Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Haonan Qin
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Jinxiu Han
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Yuhan Xu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Wenzi Li
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Xue-Peng Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Wei Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Ulf-Peter Apfel
- Ruhr-Universität Bochum, Fakultät für Chemie und Biochemie, Anorganische Chemie I, Universitätsstrasse 150, 44801, Bochum, Germany
- Fraunhofer UMSICHT, Osterfelder Strasse 3, 46047, Oberhausen, Germany
| | - Rui Cao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
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4
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Amtawong J, Montgomery CL, Bein GP, Raithel AL, Hamann TW, Chen CH, Dempsey JL. Mechanism-Guided Kinetic Analysis of Electrocatalytic Proton Reduction Mediated by a Cobalt Catalyst Bearing a Pendant Basic Site. J Am Chem Soc 2024; 146:3742-3754. [PMID: 38316637 DOI: 10.1021/jacs.3c10408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
Cobalt polypyridyl complexes stand out as efficient catalysts for electrochemical proton reduction, but investigations into their operating mechanisms, with broad-reaching implications in catalyst design, have been limited. Herein, we investigate the catalytic activity of a cobalt(II) polypyridyl complex bearing a pendant pyridyl base with a series of organic acids spanning 20 pKa units in acetonitrile. Structural analysis, as well as electrochemical studies, reveals that the Co(III) hydride intermediate is formed through reduction of the Co(II) catalyst followed by direct metal protonation in the initial EC step despite the presence of the pendant base, which is commonly thought of as a more kinetically accessible protonation site. Protonation of the pendant base occurs after the Co(III) hydride intermediate is further reduced in the overall ECEC pathway. Additionally, when the acid used is sufficiently strong, the Co(II) catalyst can be protonated, and the Co(III) hydride can react directly with acid to release H2. With thorough mechanistic understanding, the appropriate electroanalytical methods were identified to extract rate constants for the elementary steps over a range of conditions. Thermodynamic square schemes relating catalytic intermediates proposed in the three electrocatalytic HER mechanisms were constructed. These findings reveal a full description of the HER electrocatalysis mediated by this molecular system and provide insights into strategies to improve synthetic fuel-forming catalysts operative through metal hydride intermediates.
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Affiliation(s)
- Jaruwan Amtawong
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Charlotte L Montgomery
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Gabriella P Bein
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Austin L Raithel
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Thomas W Hamann
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Chun-Hsing Chen
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Jillian L Dempsey
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
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5
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Droghetti F, Amati A, Ruggi A, Natali M. Bioinspired motifs in proton and CO 2 reduction with 3d-metal polypyridine complexes. Chem Commun (Camb) 2024; 60:658-673. [PMID: 38117176 DOI: 10.1039/d3cc05156k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
The synthesis of active and efficient catalysts for solar fuel generation is nowadays of high relevance for the scientific community, but at the same time poses great challenges. Critical requirements are mainly associated with the kinetic barriers due to the multi-proton and multi-electron nature of the hydrogen evolution reaction (HER) and the CO2 reduction reaction (CO2RR) as well as to selectivity issues. In this regard, natural enzymes can be a source of inspiration for the design of effective and selective catalysts to target such fundamental reactions. In this Feature Article we review some recent works on molecular catalysts for both the HER and the CO2RR performed in our labs and other research teams which mainly address (i) the role of redox non-innocent ligands, to lower the overpotential for catalysis and control the selectivity, and (ii) the role of internal relays, to assist formation of catalytic intermediates via intramolecular routes. The selected exemplars have been chosen to emphasize that, although the molecular structures and the synthetic motifs are different from those of the active sites of natural enzymes, many affinities in terms of catalytic mechanism and functionality are instead present, which account for the observed remarkable performances under operative conditions. The data discussed herein thus demonstrate the great potential and the privileged role of molecular catalysts towards the design and construction of hybrid photochemical systems for solar energy conversion into fuels.
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Affiliation(s)
- Federico Droghetti
- Department of Chemical, Pharmaceutical and Agricultural Sciences (DOCPAS), University of Ferrara, Via L. Borsari 46, 44121 Ferrara, Italy.
| | - Agnese Amati
- Department of Chemical, Pharmaceutical and Agricultural Sciences (DOCPAS), University of Ferrara, Via L. Borsari 46, 44121 Ferrara, Italy.
| | - Albert Ruggi
- Department of Chemistry, University of Fribourg, Chemin de Musée 9, CH-1700 Fribourg, Switzerland.
| | - Mirco Natali
- Department of Chemical, Pharmaceutical and Agricultural Sciences (DOCPAS), University of Ferrara, Via L. Borsari 46, 44121 Ferrara, Italy.
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6
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Lucarini F, Fize J, Morozan A, Droghetti F, Solari E, Scopelliti R, Marazzi M, Natali M, Pastore M, Artero V, Ruggi A. Electro- and photochemical H 2 generation by Co(ii) polypyridyl-based catalysts bearing ortho-substituted pyridines. SUSTAINABLE ENERGY & FUELS 2023; 7:3384-3394. [PMID: 37441238 PMCID: PMC10334870 DOI: 10.1039/d3se00295k] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 05/25/2023] [Indexed: 07/15/2023]
Abstract
Cobalt(ii) complexes featuring hexadentate amino-pyridyl ligands have been recently discovered as highly active catalysts for the Hydrogen Evolution Reaction (HER), whose high performance arises from the possibility of assisting proton transfer processes via intramolecular routes involving detached pyridine units. With the aim of gaining insights into such catalytic routes, three new proton reduction catalysts based on amino-polypyridyl ligands are reported, focusing on substitution of the pyridine ortho-position. Specifically, a carboxylate (C2) and two hydroxyl substituted pyridyl moieties (C3, C4) are introduced with the aim of promoting intramolecular proton transfer which possibly enhances the efficiency of the catalysts. Foot-of-the-wave and catalytic Tafel plot analyses have been utilized to benchmark the catalytic performances under electrochemical conditions in acetonitrile using trifluoroacetic acid as the proton source. In this respect, the cobalt complex C3 turns out to be the fastest catalyst in the series, with a maximum turnover frequency (TOF) of 1.6 (±0.5) × 105 s-1, but at the expense of large overpotentials. Mechanistic investigations by means of Density Functional Theory (DFT) suggest a typical ECEC mechanism (i.e. a sequence of reduction - E - and protonation - C - events) for all the catalysts, as previously envisioned for the parent unsubstituted complex C1. Interestingly, in the case of complex C2, the catalytic route is triggered by initial protonation of the carboxylate group resulting in a less common (C)ECEC mechanism. The pivotal role of the hexadentate chelating ligand in providing internal proton relays to assist hydrogen elimination is further confirmed within this novel class of molecular catalysts, thus highlighting the relevance of a flexible polypyridine ligand in the design of efficient cobalt complexes for the HER. Photochemical studies in aqueous solution using [Ru(bpy)3]2+ (where bpy = 2,2'-bipyridine) as the sensitizer and ascorbate as the sacrificial electron donor support the superior performance of C3.
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Affiliation(s)
| | - Jennifer Fize
- Univ. Grenoble Alpes, CNRS, CEA, IRIG, Laboratoire de Chimie et Biologie des Métaux 17 rue des Martyrs 38000 Grenoble France
| | - Adina Morozan
- Univ. Grenoble Alpes, CNRS, CEA, IRIG, Laboratoire de Chimie et Biologie des Métaux 17 rue des Martyrs 38000 Grenoble France
| | - Federico Droghetti
- Università degli Studi di Ferrara, Dipartimento di Scienze Chimiche Farmaceutiche ed Agrarie (DOCPAS) Via L. Borsari 46 44121 Ferrara Italy
| | - Euro Solari
- Institut des Sciences et Ingénierie Chimique, École Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Rosario Scopelliti
- Institut des Sciences et Ingénierie Chimique, École Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Marco Marazzi
- Universidad de Alcalá, Departamento de Química Analítica, Química Física e Ingeniería Química, Grupo de Reactividad y Estructura Molecular (RESMOL) Alcalá de Henares Madrid Spain
- Universidad de Alcalá, Instituto de Investigación Química ''Andrés M. del Río'' (IQAR) Alcalá de Henares Madrid Spain
| | - Mirco Natali
- Università degli Studi di Ferrara, Dipartimento di Scienze Chimiche Farmaceutiche ed Agrarie (DOCPAS) Via L. Borsari 46 44121 Ferrara Italy
| | - Mariachiara Pastore
- Université de Lorraine & CNRS, Laboratoire de Physique et Chimie Théoriques (LPCT) F-54000 Nancy France
| | - Vincent Artero
- Univ. Grenoble Alpes, CNRS, CEA, IRIG, Laboratoire de Chimie et Biologie des Métaux 17 rue des Martyrs 38000 Grenoble France
| | - Albert Ruggi
- Université de Fribourg Ch. du Musée 9 1700 Fribourg Switzerland
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7
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McCool JD, Zhang S, Cheng I, Zhao X. Rational development of molecular earth-abundant metal complexes for electrocatalytic hydrogen production. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(22)64150-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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8
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Rethinking Electronic Effects in Photochemical Hydrogen Evolution Using CuInS 2@ZnS Quantum Dots Sensitizers. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27238277. [PMID: 36500370 PMCID: PMC9735784 DOI: 10.3390/molecules27238277] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/18/2022] [Accepted: 11/22/2022] [Indexed: 11/29/2022]
Abstract
Molecular catalysts based on coordination complexes for the generation of hydrogen via photochemical water splitting exhibit a large versatility and tunability of the catalytic properties through chemical functionalization. In the present work, we report on light-driven hydrogen production in an aqueous solution using a series of cobalt polypyridine complexes as hydrogen evolving catalysts (HECs) in combination with CuInS2@ZnS quantum dots (QDs) as sensitizers, and ascorbate as the electron donor. A peculiar trend in activity has been observed depending on the substituents present on the polypyridine ligand. This trend markedly differs from that previously recorded using [Ru(bpy)3]2+ (where bpy = 2,2'-bipyridine) as the sensitizer and can be ascribed to different kinetically limiting pathways in the photochemical reaction (viz. protonation kinetics with the ruthenium chromophore, catalyst activation via electron transfer from the QDs in the present system). Hence, this work shows how the electronic effects on light-triggered molecular catalysis are not exclusive features of the catalyst unit but depend on the whole photochemical system.
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9
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Weder N, Grundmann NS, Probst B, Blacque O, Ketkaew R, Creazzo F, Luber S, Alberto R. Two Novel Dinuclear Cobalt Polypyridyl Complexes in Electro- and Photocatalysis for Hydrogen Production: Cooperativity Increases Performance. CHEMSUSCHEM 2022; 15:e202201049. [PMID: 35765252 PMCID: PMC9545343 DOI: 10.1002/cssc.202201049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 06/27/2022] [Indexed: 06/15/2023]
Abstract
Syntheses and mechanisms of two dinuclear Co-polypyridyl catalysts for the H2 evolution reaction (HER) were reported and compared to their mononuclear analogue (R1). In both catalysts, two di-(2,2'-bipyridin-6-yl)-methanone units were linked by either 2,2'-bipyridin-6,6'-yl or pyrazin-2,5-yl. Complexation with CoII gave dinuclear compounds bridged by pyrazine (C2) or bipyridine (C1). Photocatalytic HER gave turnover numbers (TONs) of up to 20000 (C2) and 7000 (C1) in water. Electrochemically, C1 was similar to the R1, whereas C2 showed electronic coupling between the two Co centers. The E(CoII/I ) split by 360 mV into two separate waves. Proton reduction in DMF was investigated for R1 with [HNEt3 ](BF4 ) by simulation, foot of the wave analysis, and linear sweep voltammetry (LSV) with in-line detection of H2 . All methods agreed well with an (E)ECEC mechanism and the first protonation being rate limiting (≈104 m-1 s-1 ). The second reduction was more anodic than the first one. pKa values of around 10 and 7.5 were found for the two protonations. LSV analysis with H2 detection for all catalysts and acids with different pKa values [HBF4 , pKa (DMF)≈3.4], intermediate {[HNEt3 ](BF4 ), pKa (DMF)≈9.2} to weak [AcOH, pKa (DMF)≈13.5] confirmed electrochemical H2 production, distinctly dependent on the pKa values. Only HBF4 protonated CoI intermediates. The two metals in the dualcore C2 cooperated with an increase in rate to a competitive 105 m-1 s-1 with [HNEt3 ](BF4 ). The overpotential decreased compared to R1 by 100 mV. Chronoamperometry established high stabilities for all catalysts with TONlim of 100 for R1 and 320 for C1 and C2.
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Affiliation(s)
- Nicola Weder
- Department of ChemistryUniversity of ZurichWinterthurerstrasse 190Switzerland
| | - Nora S. Grundmann
- Department of ChemistryUniversity of ZurichWinterthurerstrasse 190Switzerland
| | - Benjamin Probst
- Department of ChemistryUniversity of ZurichWinterthurerstrasse 190Switzerland
| | - Olivier Blacque
- Department of ChemistryUniversity of ZurichWinterthurerstrasse 190Switzerland
| | - Rangsiman Ketkaew
- Department of ChemistryUniversity of ZurichWinterthurerstrasse 190Switzerland
| | - Fabrizio Creazzo
- Department of ChemistryUniversity of ZurichWinterthurerstrasse 190Switzerland
| | - Sandra Luber
- Department of ChemistryUniversity of ZurichWinterthurerstrasse 190Switzerland
| | - Roger Alberto
- Department of ChemistryUniversity of ZurichWinterthurerstrasse 190Switzerland
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10
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Klein DM, Passerini L, Huber M, Bonnet S. A stable alkylated cobalt catalyst for photocatalytic H2 generation in liposomes. ChemCatChem 2022. [DOI: 10.1002/cctc.202200484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- David M. Klein
- Universiteit Leiden Leiden Institute of Chemistry NETHERLANDS
| | | | - Martina Huber
- Universiteit Leiden Department of Physics NETHERLANDS
| | - Sylvestre Bonnet
- Leiden University: Universiteit Leiden Leiden Institute of Chemistry Gorlaeus laboratories, Einsteinweg 55PO Box 9502 2300 RA Leiden NETHERLANDS
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11
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Droghetti F, Lucarini F, Molinari A, Ruggi A, Natali M. Recent findings and future directions in photosynthetic hydrogen evolution using polypyridine cobalt complexes. Dalton Trans 2022; 51:10658-10673. [PMID: 35475511 PMCID: PMC9936794 DOI: 10.1039/d2dt00476c] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The production of hydrogen gas using water as the molecular substrate currently represents one of the most challenging and appealing reaction schemes in the field of artificial photosynthesis (AP), i.e., the conversion of solar energy into fuels. In order to be efficient, this process requires a suitable combination of a light-harvesting sensitizer, an electron donor, and a hydrogen-evolving catalyst (HEC). In the last few years, cobalt polypyridine complexes have been discovered to be competent molecular catalysts for the hydrogen evolution reaction (HER), showing enhanced efficiency and stability with respect to previously reported molecular species. This perspective collects information about all relevant cobalt polypyridine complexes employed for the HER in aqueous solution under light-driven conditions in the presence of Ru(bpy)32+ (where bpy = 2,2'-bipyridine) as the photosensitizer and ascorbate as the electron donor, trying to highlight promising chemical motifs and aiming towards efficient catalytic activity in order to stimulate further efforts to design molecular catalysts for hydrogen generation and allow their profitable implementation in devices. As a final step, a few suggestions for the benchmarking of HECs employed under light-driven conditions are introduced.
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Affiliation(s)
- Federico Droghetti
- Department of Chemical, Pharmaceutical, and Agricultural Sciences (DOCPAS), University of Ferrara, Via L. Borsari 46, 44121 Ferrara, Italy.
| | - Fiorella Lucarini
- Département de Chimie, Université de Fribourg, Chemin du Musée 9, 1700 Fribourg, Switzerland.
| | - Alessandra Molinari
- Department of Chemical, Pharmaceutical, and Agricultural Sciences (DOCPAS), University of Ferrara, Via L. Borsari 46, 44121 Ferrara, Italy.
| | - Albert Ruggi
- Département de Chimie, Université de Fribourg, Chemin du Musée 9, 1700 Fribourg, Switzerland.
| | - Mirco Natali
- Department of Chemical, Pharmaceutical, and Agricultural Sciences (DOCPAS), University of Ferrara, Via L. Borsari 46, 44121 Ferrara, Italy. .,Centro Interuniversitario per la Conversione Chimica dell'Energia Solare (SolarChem), sez. di Ferrara, Via L. Borsari 46, 44121 Ferrara, Italy
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12
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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
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13
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Alberto R, Müller P, Probst B, Spingler B, Blacque O. Polar substituents enable efficient catalysis for a class of cobalt polypyridyl hydrogen evolving catalyst. Helv Chim Acta 2022. [DOI: 10.1002/hlca.202100237] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Roger Alberto
- University of Zürich Department of Chemistry Winterthurerstr. 190 CH-8057 Zürich SWITZERLAND
| | - Peter Müller
- University of Zurich Faculty of Mathematics and Science: Universitat Zurich Mathematisch-Naturwissenschaftliche Fakultat Chemistry SWITZERLAND
| | - Benjamin Probst
- University of Zurich Faculty of Mathematics and Science: Universitat Zurich Mathematisch-Naturwissenschaftliche Fakultat Chemistry SWITZERLAND
| | - Bernhard Spingler
- University of Zurich Faculty of Mathematics and Science: Universitat Zurich Mathematisch-Naturwissenschaftliche Fakultat Chemistry SWITZERLAND
| | - Olivier Blacque
- University of Zurich Faculty of Science: Universitat Zurich Mathematisch-Naturwissenschaftliche Fakultat Chemistry SWITZERLAND
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14
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Ladomenou K, Papadakis M, Landrou G, Giorgi M, Drivas C, Kennou S, Hardré R, Massin J, Coutsolelos AG, Orio M. Nickel Complexes and Carbon Dots for Efficient Light‐Driven Hydrogen Production. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kalliopi Ladomenou
- Laboratory of Bioinorganic Chemistry Chemistry Department University of Crete PO Box 2208 71003 Heraklion Crete Greece
| | | | - Georgios Landrou
- Laboratory of Bioinorganic Chemistry Chemistry Department University of Crete PO Box 2208 71003 Heraklion Crete Greece
| | - Michel Giorgi
- Aix Marseille Univ, CNRS, Spectropole FR1739 Marseille France
| | - Charalambos Drivas
- Surface Science Laboratory Chemical Engineering Department University of Patras 26504 Patras Greece
| | - Stella Kennou
- Surface Science Laboratory Chemical Engineering Department University of Patras 26504 Patras Greece
| | - Renaud Hardré
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2 Marseille France
| | - Julien Massin
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2 Marseille France
| | - Athanassios G. Coutsolelos
- Laboratory of Bioinorganic Chemistry Chemistry Department University of Crete PO Box 2208 71003 Heraklion Crete Greece
| | - Maylis Orio
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2 Marseille France
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15
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Lucarini F, Bongni D, Schiel P, Bevini G, Benazzi E, Solari E, Fadaei-Tirani F, Scopelliti R, Marazzi M, Natali M, Pastore M, Ruggi A. Rationalizing Photo-Triggered Hydrogen Evolution Using Polypyridine Cobalt Complexes: Substituent Effects on Hexadentate Chelating Ligands. CHEMSUSCHEM 2021; 14:1874-1885. [PMID: 33650260 DOI: 10.1002/cssc.202100161] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 02/16/2021] [Indexed: 06/12/2023]
Abstract
Four novel polypyridine cobalt(II) complexes were developed based on a hexadentate ligand scaffold bearing either electron-withdrawing (-CF3 ) or electron-donating (-OCH3 ) groups in different positions of the ligand. Experiments and theoretical calculations were combined to perform a systematic investigation of the effect of the ligand modification on the hydrogen evolution reaction. The results indicated that the position, rather than the type of substituent, was the dominating factor in promoting catalysis. The best performances were observed upon introduction of substituents on the pyridine moiety of the hexadentate ligand, which promoted the formation of the Co(II)H intermediate via intramolecular proton transfer reactions with low activation energy. Quantum yields of 11.3 and 10.1 %, maximum turnover frequencies of 86.1 and 76.6 min-1 , and maximum turnover numbers of 5520 and 4043 were obtained, respectively, with a -OCH3 and a -CF3 substituent.
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Affiliation(s)
- Fiorella Lucarini
- Université de Fribourg Département de Chimie, Chemin du Musée 9, 1700, Fribourg, Switzerland
| | - David Bongni
- Université de Fribourg Département de Chimie, Chemin du Musée 9, 1700, Fribourg, Switzerland
| | - Philippe Schiel
- Université de Fribourg Département de Chimie, Chemin du Musée 9, 1700, Fribourg, Switzerland
| | - Gabriele Bevini
- Università degli studi di Ferrara Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie, Via L. Borsari 46, 44121, Ferrara, Italy
| | - Elisabetta Benazzi
- Università degli studi di Ferrara Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie, Via L. Borsari 46, 44121, Ferrara, Italy
| | - Euro Solari
- Institut des Sciences et Ingénierie Chimique, École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
| | - Farzaneh Fadaei-Tirani
- Institut des Sciences et Ingénierie Chimique, École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
| | - Rosario Scopelliti
- Institut des Sciences et Ingénierie Chimique, École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
| | - Marco Marazzi
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Universidad de Alcalá, Ctra. Madrid-Barcelona Km. 33,600, E-28805 Alcalá de Henares, Madrid), Spain
- Chemical Research Institute "Andrés M. del Río" (IQAR), Universidad de Alcalá, 28871 Alcalá de Henares, Madrid), Spain
| | - Mirco Natali
- Università degli studi di Ferrara Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie, Via L. Borsari 46, 44121, Ferrara, Italy
| | - Mariachiara Pastore
- Université de Lorraine & CNRS, Laboratoire de Physique et Chimie Théoriques (LPCT), 54000, Nancy, France
| | - Albert Ruggi
- Université de Fribourg Département de Chimie, Chemin du Musée 9, 1700, Fribourg, Switzerland
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16
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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]
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17
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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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18
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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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19
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Celestine MJ, Lawrence MA, Evaristo NK, Legere BW, Knarr JK, Schott O, Picard V, Bullock JL, Hanan GS, McMillen CD, Bayse CA, Holder AA. N-substituted 2-pyridinecarbothioamides and polypyridyl mixed-ligand cobalt(III)-containing complexes for photocatalytic hydrogen generation. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119726] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Lawrence MA, Mulder WH, Celestine MJ, McMillen CD, Holder AA. Assessment of two cobalt(II) complexes with pincer ligands for the electrocatalytic hydrogen evolution reaction. A comparison of the SNS vs ONS coordination. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119497] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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21
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Alvarez-Hernandez JL, Sopchak AE, Bren KL. Buffer pKa Impacts the Mechanism of Hydrogen Evolution Catalyzed by a Cobalt Porphyrin-Peptide. Inorg Chem 2020; 59:8061-8069. [DOI: 10.1021/acs.inorgchem.0c00362] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
| | - Andrew E. Sopchak
- Department of Chemistry, University of Rochester, Rochester, New York 14627-0216, United States
| | - Kara L. Bren
- Department of Chemistry, University of Rochester, Rochester, New York 14627-0216, United States
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22
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Hernández-Valdés D, Avignon F, Müller P, Meola G, Probst B, Fox T, Spingler B, Alberto R. [Re(η 6-arene) 2] + as a highly stable ferrocene-like scaffold for ligands and complexes. Dalton Trans 2020; 49:5250-5256. [PMID: 32242190 DOI: 10.1039/d0dt00731e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ferrocenes are versatile ligand scaffolds, complexes of which have found numerous applications in catalysis. Structurally similar but of higher redox stabilites are sandwich complexes of the [Re(η6-arene)2]+ type. We report herein routes for conjugating potential ligands to a single or to both arenes in this scaffold. Since the arene rings can freely rotate, the [Re(η6-arene)2]+ has a high degree of structural flexibility. Polypyridyl ligands were successfully introduced. The coordination of Co(ii) to such a model tetrapyridyl-Re(i)-bis-benzene complex produced a bimetallic Re(i)-Co(ii) complex. To show the stability of the resulting architecture, a selected complex was subjected to photocatalytic reactions. It showed good activity in proton reduction over a long time and did not decompose, corroborating its extraordinary stability even under light irradiation. Its activity compares well with the parent catalyst in turn over numbers and frequencies. The supply of electrons limits catalytic turnover frequency at concentrations below ∼10 μM. We also show that other ligands can be introduced along these strategies. The great diversity offered by [Re(η6-arene)2]+ sandwich complexes from a synthetic point allows this concept to be extended to other catalytic processes, comparable to ferrocenes.
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Affiliation(s)
- Daniel Hernández-Valdés
- Department of Chemistry, University of Zurich, Winterthurerstr. 190, CH-8057 Zurich, Switzerland.
| | - Frédéric Avignon
- Department of Chemistry, University of Zurich, Winterthurerstr. 190, CH-8057 Zurich, Switzerland. and Département de Chimie, École Normale Supérieure, PSL Research University, 75005 Paris, France
| | - Peter Müller
- Department of Chemistry, University of Zurich, Winterthurerstr. 190, CH-8057 Zurich, Switzerland.
| | - Giuseppe Meola
- Department of Chemistry, University of Zurich, Winterthurerstr. 190, CH-8057 Zurich, Switzerland.
| | - Benjamin Probst
- Department of Chemistry, University of Zurich, Winterthurerstr. 190, CH-8057 Zurich, Switzerland.
| | - Thomas Fox
- Department of Chemistry, University of Zurich, Winterthurerstr. 190, CH-8057 Zurich, Switzerland.
| | - Bernhard Spingler
- Department of Chemistry, University of Zurich, Winterthurerstr. 190, CH-8057 Zurich, Switzerland.
| | - Roger Alberto
- Department of Chemistry, University of Zurich, Winterthurerstr. 190, CH-8057 Zurich, Switzerland.
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23
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24
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Weder N, Probst B, Sévery L, Fernández-Terán RJ, Beckord J, Blacque O, Tilley SD, Hamm P, Osterwalder J, Alberto R. Mechanistic insights into photocatalysis and over two days of stable H 2 generation in electrocatalysis by a molecular cobalt catalyst immobilized on TiO 2. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00330a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Molecular and heterogeneous water reduction combined: Over 2 days of electrocatalysis of a cobalt polypyridyl catalyst immobilized on TiO2.
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Affiliation(s)
- Nicola Weder
- Department of Chemistry
- University of Zurich
- 8057 Zurich
- Switzerland
| | - Benjamin Probst
- Department of Chemistry
- University of Zurich
- 8057 Zurich
- Switzerland
| | - Laurent Sévery
- Department of Chemistry
- University of Zurich
- 8057 Zurich
- Switzerland
| | | | - Jan Beckord
- Department of Physics
- University of Zurich
- 8057 Zurich
- Switzerland
| | - Olivier Blacque
- Department of Chemistry
- University of Zurich
- 8057 Zurich
- Switzerland
| | - S. David Tilley
- Department of Chemistry
- University of Zurich
- 8057 Zurich
- Switzerland
| | - Peter Hamm
- Department of Chemistry
- University of Zurich
- 8057 Zurich
- Switzerland
| | | | - Roger Alberto
- Department of Chemistry
- University of Zurich
- 8057 Zurich
- Switzerland
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25
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Alvarez R, Nievergelt PP, Slyshkina E, Müller P, Alberto R, Spingler B. Single crystal growth of water-soluble metal complexes with the help of the nano-crystallization method. Dalton Trans 2020; 49:9632-9640. [DOI: 10.1039/d0dt01236j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Let pipetting robots set up nano crystallization trials of water-soluble metal complexes in order to obtain single crystals!
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Affiliation(s)
- Ricardo Alvarez
- Department of Chemistry
- University of Zurich
- 8057 Zurich
- Switzerland
| | | | | | - Peter Müller
- Department of Chemistry
- University of Zurich
- 8057 Zurich
- Switzerland
| | - Roger Alberto
- Department of Chemistry
- University of Zurich
- 8057 Zurich
- Switzerland
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26
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Tong L, Duan L, Zhou A, Thummel RP. First-row transition metal polypyridine complexes that catalyze proton to hydrogen reduction. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2019.213079] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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27
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Basu D, Mazumder S, Kpogo KK, Verani CN. Influence of nitro substituents on the redox, electronic, and proton reduction catalytic behavior of phenolate-based [N 2O 3]-type cobalt(iii) complexes. Dalton Trans 2019; 48:14669-14677. [PMID: 31536091 DOI: 10.1039/c9dt03158h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We report on the synthesis, redox, electronic, and catalytic behavior of two new cobalt(iii) complexes, namely [CoIII(L1)MeOH] (1) and [CoIII(L2)MeOH] (2). These species contain nitro-rich, phenolate-based pentadentate ligands and present dramatically distinct properties associated with the position in which the -NO2 substituents are installed. Species 1 displays nitro-substituted phenolates, and exhibits irreversible redox response and negligible catalytic activity, whereas 2 has fuctionalized phenylene moieties, shows much improved redox reversibility and catalytic proton reduction activity at low overpotentials. A concerted experimental and theoretical approach sheds some light on these drastic differences.
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Affiliation(s)
- Debashis Basu
- Department of Chemistry, Wayne State University, Detroit, MI-48202, USA.
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28
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Gueret R, Castillo CE, Rebarz M, Thomas F, Sliwa M, Chauvin J, Dautreppe B, Pécaut J, Fortage J, Collomb MN. Cobalt(II) Pentaaza-Macrocyclic Schiff Base Complex as Catalyst for Light-Driven Hydrogen Evolution in Water: Electrochemical Generation and Theoretical Investigation of the One-Electron Reduced Species. Inorg Chem 2019; 58:9043-9056. [DOI: 10.1021/acs.inorgchem.9b00447] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Robin Gueret
- Univ. Grenoble Alpes, CNRS, DCM, 38000 Grenoble, France
| | | | - Mateusz Rebarz
- Université de Lille, CNRS, UMR 8516, LASIR, Laboratoire de Spectrochimie Infrarouge et Raman, F59 000 Lille, France
| | | | - Michel Sliwa
- Université de Lille, CNRS, UMR 8516, LASIR, Laboratoire de Spectrochimie Infrarouge et Raman, F59 000 Lille, France
| | | | - Baptiste Dautreppe
- Univ. Grenoble Alpes, CNRS, DCM, 38000 Grenoble, France
- Univ. Grenoble Alpes, CEA, CNRS, IRI, SYMMES 38000 Grenoble, France
| | - Jacques Pécaut
- Univ. Grenoble Alpes, CEA, CNRS, IRI, SYMMES 38000 Grenoble, France
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29
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N,N-Di(pyridin-2-yl)quinolin-6-amine: synthesis and coordination properties. Russ Chem Bull 2019. [DOI: 10.1007/s11172-019-2460-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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30
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Kohler L, Mulfort KL. Photoinduced electron transfer kinetics of linked Ru-Co photocatalyst dyads. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2018.12.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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31
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Wang P, Liang G, Boyd CL, Webster CE, Zhao X. Catalytic H
2
Evolution by a Mononuclear Cobalt Complex with a Macrocyclic Pentadentate Ligand. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201801418] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Ping Wang
- Department of Chemistry The University of Memphis Memphis Tennessee 38152 USA
| | - Guangchao Liang
- Department of Chemistry Mississippi State University Mississippi 39762 USA
| | | | | | - Xuan Zhao
- Department of Chemistry The University of Memphis Memphis Tennessee 38152 USA
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32
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Bergamini G, Natali M. Homogeneous vs. heterogeneous catalysis for hydrogen evolution by a nickel(ii) bis(diphosphine) complex. Dalton Trans 2019; 48:14653-14661. [DOI: 10.1039/c9dt02846c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A nickel(ii) bis(diphosphine) complex bearing carboxylic acid groups has been tested as a catalyst for hydrogen evolution under different conditions.
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Affiliation(s)
- Giovanni Bergamini
- Department of Chemical and Pharmaceutical Sciences
- University of Ferrara
- Ferrara
- Italy
| | - Mirco Natali
- Department of Chemical and Pharmaceutical Sciences
- University of Ferrara
- Ferrara
- Italy
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33
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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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34
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Klug CM, Dougherty WG, Kassel WS, Wiedner ES. Electrocatalytic Hydrogen Production by a Nickel Complex Containing a Tetradentate Phosphine Ligand. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00548] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Christina M. Klug
- Center for Molecular Electrocatalysis, Pacific Northwest National Laboratory, P.O. Box 999, K2-57, Richland, Washington 99352, United States
| | - William G. Dougherty
- Department of Chemistry, Villanova University, 800 East Lancaster Avenue, Villanova, Pennsylvania 19085, United States
| | - W. Scott Kassel
- Department of Chemistry, Villanova University, 800 East Lancaster Avenue, Villanova, Pennsylvania 19085, United States
| | - Eric S. Wiedner
- Center for Molecular Electrocatalysis, Pacific Northwest National Laboratory, P.O. Box 999, K2-57, Richland, Washington 99352, United States
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35
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Smolentsev G, Soldatov MA, Probst B, Bachmann C, Azzaroli N, Alberto R, Nachtegaal M, van Bokhoven JA. Structure of the Co I Intermediate of a Cobalt Pentapyridyl Catalyst for Hydrogen Evolution Revealed by Time-Resolved X-ray Spectroscopy. CHEMSUSCHEM 2018; 11:3087-3091. [PMID: 30009517 DOI: 10.1002/cssc.201801140] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 07/03/2018] [Indexed: 06/08/2023]
Abstract
Cobalt polypyridyls are highly efficient water-stable molecular catalysts for hydrogen evolution. The catalytic mechanism explaining their activity is under debate and the main question is the nature of the involvement of pyridyls in the proton transfer: the pentapyridyl ligand, acting as a pentadentate ligand, can provide stability to the catalyst or one of the pyridines can be involved in the proton transfer. Time-resolved Co K-edge X-ray absorption spectroscopy in the microsecond time range indicates that, for the [CoII (aPPy)] catalyst (aPPy=di([2,2'-bipyridin]-6-yl)(pyridin-2-yl)methanol), the pendant pyridine dissociates from the cobalt in the intermediate CoI state. This opens the possibility for pyridinium to act as an intramolecular proton donor. In the resting state, the catalyst returns to the original six-coordinate high-spin CoII state with a pentapyridyl and one water molecule coordinating to the metal center. Such a bifunctional role of the polypyridyl ligands can be exploited during further optimization of the catalyst.
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Affiliation(s)
- Grigory Smolentsev
- Paul Scherrer Institute, Villigen, 5232, Switzerland
- Smart Materials International Research Center, Southern Federal University of Russia, Rostov-on-Don, 344090, Russian Federation
| | - Mikhail A Soldatov
- Smart Materials International Research Center, Southern Federal University of Russia, Rostov-on-Don, 344090, Russian Federation
| | - Benjamin Probst
- Department of Chemistry, University of Zurich, Zurich, 8057, Switzerland
| | - Cyril Bachmann
- Department of Chemistry, University of Zurich, Zurich, 8057, Switzerland
| | | | - Roger Alberto
- Department of Chemistry, University of Zurich, Zurich, 8057, Switzerland
| | | | - Jeroen A van Bokhoven
- Paul Scherrer Institute, Villigen, 5232, Switzerland
- ETH Zurich, Zurich, 8093, Switzerland
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36
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Wang P, Liang G, Reddy MR, Long M, Driskill K, Lyons C, Donnadieu B, Bollinger JC, Webster CE, Zhao X. Electronic and Steric Tuning of Catalytic H2 Evolution by Cobalt Complexes with Pentadentate Polypyridyl-Amine Ligands. J Am Chem Soc 2018; 140:9219-9229. [DOI: 10.1021/jacs.8b05108] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Ping Wang
- Department of Chemistry, The University of Memphis, Memphis, Tennessee 38152, United States
| | - Guangchao Liang
- Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - M. Ramana Reddy
- Department of Chemistry, The University of Memphis, Memphis, Tennessee 38152, United States
| | - Melissa Long
- Department of Chemistry, The University of Memphis, Memphis, Tennessee 38152, United States
| | - Kandria Driskill
- Department of Chemistry & Department of Biological Sciences, Arkansas State University, Jonesboro, Arkansas 72401, United States
| | - Christian Lyons
- Department of Chemistry, Christian Brother University, Memphis, Tennessee 38104, United States
| | - Bruno Donnadieu
- Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - John C. Bollinger
- Structural Biology X-Ray Diffraction Laboratory, St. Jude Children’s Research Hospital, Memphis, Tennessee 38105, United States
| | - Charles Edwin Webster
- Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Xuan Zhao
- Department of Chemistry, The University of Memphis, Memphis, Tennessee 38152, United States
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