1
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Clay CD, Mueller CM, Rich CC, Schatz GC, Bruggeman PJ, Frontiera RR. Evidence for Superoxide-Initiated Oxidation of Aniline in Water by Pulsed, Atmospheric Pressure Plasma. J Phys Chem Lett 2024; 15:6918-6926. [PMID: 38935645 DOI: 10.1021/acs.jpclett.4c01323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2024]
Abstract
Plasma-driven solution electrochemistry (PDSE) uses plasma-generated reactive species to drive redox reactions in solution. Nonthermal, atmospheric pressure plasmas, when irradiating water, produce many redox species. While PDSE is a promising chemical tool, there is limited insight into the mechanisms of the reactions due to the variety of short-lived reagents produced. In this study, we use aniline as a model system for studying redox mechanisms of PDSE. We show that the plasma irradiation of aqueous aniline solutions drives the formation of polyaniline oligomer, which is suppressed under acidic starting conditions. The addition of (2,2,6,6-Tetramethylpiperidin-1-yl)oxyl (TEMPO), a radical scavenger, decreases the formation of oligomer by 80%, and the addition of superoxide dismutase fully hinders oligomerization. These results lead us to conclude that the oligomerization of aniline by plasma irradiation is initiated by superoxide. This discovery provides novel insights into PDSE mechanisms and illustrates a potential method of harnessing superoxide for chemical reactions.
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Affiliation(s)
- Collin D Clay
- University of Minnesota - Twin Cities, Department of Chemistry, Smith Hall, 207 Pleasant St SE, Minneapolis, Minnesota 55455-0431, United States
| | - Chelsea M Mueller
- Northwestern University, Department of Chemistry, 2145 Sheridan Rd., Evanston, Illinois 60208-3113, United States
| | - Christopher C Rich
- University of Minnesota - Twin Cities, Department of Chemistry, Smith Hall, 207 Pleasant St SE, Minneapolis, Minnesota 55455-0431, United States
| | - George C Schatz
- Northwestern University, Department of Chemistry, 2145 Sheridan Rd., Evanston, Illinois 60208-3113, United States
| | - Peter J Bruggeman
- University of Minnesota - Twin Cities, Department of Mechanical Engineering, 111 Church Street SE, Minneapolis, Minnesota 55455, United States
| | - Renee R Frontiera
- University of Minnesota - Twin Cities, Department of Chemistry, Smith Hall, 207 Pleasant St SE, Minneapolis, Minnesota 55455-0431, United States
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2
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Nikolaou V, Govind C, Balanikas E, Bharti J, Diring S, Vauthey E, Robert M, Odobel F. Antenna Effect in Noble Metal-Free Dye-Sensitized Photocatalytic Systems Enhances CO 2 -to-CO Conversion. Angew Chem Int Ed Engl 2024; 63:e202318299. [PMID: 38314922 DOI: 10.1002/anie.202318299] [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: 11/29/2023] [Revised: 01/31/2024] [Accepted: 01/31/2024] [Indexed: 02/07/2024]
Abstract
Dye-sensitized photocatalytic systems (DSPs) have been extensively investigated for solar-driven hydrogen (H2 ) evolution. However, their application in carbon dioxide (CO2 ) reduction remains limited. Furthermore, current solar-driven CO2 -to-CO DSPs typically employ rhenium complexes as catalysts. In this study, we have developed DSPs that incorporate noble metal-free components, specifically a zinc-porphyrin as photosensitizer (PS) and a cobalt-quaterpyridine as catalyst (CAT). Taking a significant stride forward, we have achieved an antenna effect for the first time in CO2 -to-CO DSPs by introducing a Bodipy as an additional chromophore to enhance light harvesting efficiency. The energy transfer from Bodipy to zinc porphyrin resulted in remarkable stability (turn over number (TON)=759 vs. CAT), and high CO evolution activity (42 mmol g-1 h-1 vs. CAT).
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Affiliation(s)
- Vasilis Nikolaou
- Nantes Université, CNRS, CEISAM, UMR 6230, F-44000, Nantes, France
| | - Chinju Govind
- Department of Physical Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, CH-1211, Geneva, Switzerland
| | - Evangelos Balanikas
- Department of Physical Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, CH-1211, Geneva, Switzerland
| | - Jaya Bharti
- Laboratoire d'Electrochimie Moléculaire, Université Paris Cité, CNRS, F-75006, Paris, France
| | - Stéphane Diring
- Nantes Université, CNRS, CEISAM, UMR 6230, F-44000, Nantes, France
| | - Eric Vauthey
- Department of Physical Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, CH-1211, Geneva, Switzerland
| | - Marc Robert
- Laboratoire d'Electrochimie Moléculaire, Université Paris Cité, CNRS, F-75006, Paris, France
- Institut Universitaire de France (IUF), F-75005, Paris, France
| | - Fabrice Odobel
- Nantes Université, CNRS, CEISAM, UMR 6230, F-44000, Nantes, France
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3
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Romito D, Govind C, Nikolaou V, Fernández-Terán RJ, Stoumpidi A, Agapaki E, Charalambidis G, Diring S, Vauthey E, Coutsolelos AG, Odobel F. Dye-Sensitized Photocatalysis: Hydrogen Evolution and Alcohol-to-Aldehyde Oxidation without Sacrifical Electron Donor. Angew Chem Int Ed Engl 2024; 63:e202318868. [PMID: 38227346 DOI: 10.1002/anie.202318868] [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: 12/12/2023] [Revised: 01/12/2024] [Accepted: 01/15/2024] [Indexed: 01/17/2024]
Abstract
There is a growing interest in developing dye-sensitized photocatalytic systems (DSPs) to produce molecular hydrogen (H2 ) as alternative energy source. To improve the sustainability of this technology, we replaced the sacrificial electron donor (SED), typically an expensive and polluting chemical, with an alcohol oxidation catalyst. This study demonstrates the first dye-sensitized system using a diketopyrrolopyrrole dye covalently linked to 2,2,6,6-tetramethyl-1-piperidine-N-oxyl (TEMPO) based catalyst for simultaneous H2 evolution and alcohol-to-aldehyde transformation operating in water with visible irradiation.
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Affiliation(s)
- Deborah Romito
- Nantes Université, CNRS, CEISAM, UMR 6230, F-44000, Nantes, France
| | - Chinju Govind
- Department of Physical Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, CH-1211, Geneva, Switzerland
| | - Vasilis Nikolaou
- Nantes Université, CNRS, CEISAM, UMR 6230, F-44000, Nantes, France
| | - Ricardo J Fernández-Terán
- Department of Physical Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, CH-1211, Geneva, Switzerland
| | - Aspasia Stoumpidi
- Laboratory of Bioinorganic Chemistry, Department of Chemistry, University of Crete Voutes Campus, 70013 Heraklion, Crete, Greece
| | - Eleni Agapaki
- Laboratory of Bioinorganic Chemistry, Department of Chemistry, University of Crete Voutes Campus, 70013 Heraklion, Crete, Greece
| | - Georgios Charalambidis
- Theoretical and Physical Chemistry Institute , National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635, Athens, Greece
| | - Stéphane Diring
- Nantes Université, CNRS, CEISAM, UMR 6230, F-44000, Nantes, France
| | - Eric Vauthey
- Department of Physical Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, CH-1211, Geneva, Switzerland
| | - Athanassios G Coutsolelos
- Laboratory of Bioinorganic Chemistry, Department of Chemistry, University of Crete Voutes Campus, 70013 Heraklion, Crete, Greece
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology - Hellas (FORTH), Vassilika Vouton, GR 70013 Heraklion, Crete, Greece
| | - Fabrice Odobel
- Nantes Université, CNRS, CEISAM, UMR 6230, F-44000, Nantes, France
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4
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Nikolaou V, Agapaki E, Nikoloudakis E, Achilleos K, Ladomenou K, Charalambidis G, Triantafyllou E, Coutsolelos AG. Highly efficient light-driven hydrogen evolution utilizing porphyrin-based nanoparticles. Chem Commun (Camb) 2023; 59:11256-11259. [PMID: 37661797 DOI: 10.1039/d3cc02922k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
We developed dye-sensitized photocatalytic systems (DSPs) by utilizing porphyrins as a photosensitizer (PS) or as a photosensitizer-catalyst (PS/CAT) upon their chemisorption onto platinum-doped titanium dioxide nanoparticles (Pt-TiO2 NPs). The DSPs coated with Pt-Tc3CP (PS/CAT entity) exhibited a record-high stability (25 500 TONs) and H2 evolution activity (707 mmol g-1 h-1) compared to similar DSPs in the literature.
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Affiliation(s)
- Vasilis Nikolaou
- Laboratory of Bioinorganic Chemistry, Department of Chemistry, University of Crete, Voutes Campus, 70013 Heraklion, Crete, Greece.
| | - Eleni Agapaki
- Laboratory of Bioinorganic Chemistry, Department of Chemistry, University of Crete, Voutes Campus, 70013 Heraklion, Crete, Greece.
| | - Emmanouil Nikoloudakis
- Laboratory of Bioinorganic Chemistry, Department of Chemistry, University of Crete, Voutes Campus, 70013 Heraklion, Crete, Greece.
| | - Katerina Achilleos
- Laboratory of Bioinorganic Chemistry, Department of Chemistry, University of Crete, Voutes Campus, 70013 Heraklion, Crete, Greece.
| | - Kalliopi Ladomenou
- Laboratory of Inorganic Chemistry, Department of Chemistry, International Hellenic University, 65404 Kavala, Greece
| | - Georgios Charalambidis
- Laboratory of Bioinorganic Chemistry, Department of Chemistry, University of Crete, Voutes Campus, 70013 Heraklion, Crete, Greece.
| | - Evitina Triantafyllou
- Laboratory of Bioinorganic Chemistry, Department of Chemistry, University of Crete, Voutes Campus, 70013 Heraklion, Crete, Greece.
| | - Athanassios G Coutsolelos
- Laboratory of Bioinorganic Chemistry, Department of Chemistry, University of Crete, Voutes Campus, 70013 Heraklion, Crete, Greece.
- Institute of Electronic Structure and Laser (IESL) Foundation for Research and Technology - Hellas (FORTH), Vassilika Vouton, 70013 Heraklion, Crete, Greece
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5
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Milan M, Hassan A, Can GA, Michal U, Pavel U, Barbora H, Hana P, Annusova A, Michal M, Ivo K. Multifunctional bandgap-reduced ZnO nanocrystals for photocatalysis, self-cleaning, and antibacterial glass surfaces. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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6
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Rafieenia R, Sulonen M, Mahmoud M, El-Gohary F, Rossa CA. Integration of microbial electrochemical systems and photocatalysis for sustainable treatment of organic recalcitrant wastewaters: Main mechanisms, recent advances, and present prospects. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 824:153923. [PMID: 35182645 DOI: 10.1016/j.scitotenv.2022.153923] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 01/20/2022] [Accepted: 02/12/2022] [Indexed: 06/14/2023]
Abstract
In recent years, microbial electrochemical systems (MESs) have demonstrated to be an environmentally friendly technology for wastewater treatment and simultaneous production of value-added products or energy. However, practical applications of MESs for the treatment of recalcitrant wastewater are limited by their low power output and slow rates of pollutant biodegradation. As a novel technology, hybrid MESs integrating biodegradation and photocatalysis have shown great potential to accelerate the degradation of bio-recalcitrant pollutants and increase the system output. In this review, we summarize recent advances of photo-assisted MESs for enhanced removal of recalcitrant pollutants, and present further discussion about the synergistic effect of biodegradation and photocatalysis. In addition, we analyse in detail different set-up configurations, discuss mechanisms of photo-enhanced extracellular electron transfer, and briefly present ongoing research cases. Finally, we highlight the current limitations and corresponding research gaps, and propose insights for future research.
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Affiliation(s)
- Razieh Rafieenia
- Department of Microbial Sciences, University of Surrey, Guildford GU2 7XH, United Kingdom.
| | - Mira Sulonen
- Department of Microbial Sciences, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - Mohamed Mahmoud
- Water Pollution Research Department, National Research Centre, 33 El-Buhouth St., Dokki, Cairo 12311, Egypt
| | - Fatma El-Gohary
- Water Pollution Research Department, National Research Centre, 33 El-Buhouth St., Dokki, Cairo 12311, Egypt
| | - Claudio Avignone Rossa
- Department of Microbial Sciences, University of Surrey, Guildford GU2 7XH, United Kingdom
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7
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Lotfi S, Ouardi ME, Ahsaine HA, Assani A. Recent progress on the synthesis, morphology and photocatalytic dye degradation of BiVO 4 photocatalysts: A review. CATALYSIS REVIEWS 2022. [DOI: 10.1080/01614940.2022.2057044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Safia Lotfi
- Laboratoire de Chimie Appliquée des Matériaux, Faculty of Sciences, Mohammed V University in Rabat, Morocco
| | - Mohamed El Ouardi
- Laboratoire de Chimie Appliquée des Matériaux, Faculty of Sciences, Mohammed V University in Rabat, Morocco
| | - Hassan Ait Ahsaine
- Laboratoire de Chimie Appliquée des Matériaux, Faculty of Sciences, Mohammed V University in Rabat, Morocco
| | - Abderrazzak Assani
- Laboratoire de Chimie Appliquée des Matériaux, Faculty of Sciences, Mohammed V University in Rabat, Morocco
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8
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Xu M, Hua Y, Fu X, Liu J. Efficient Photocatalytic Carbonyl Alkylative Amination Enabled by Titanium‐Dioxide‐Mediated Decarboxylation. Chemistry 2022; 28:e202104394. [DOI: 10.1002/chem.202104394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Indexed: 11/11/2022]
Affiliation(s)
- Mei Xu
- College of Chemistry and Chemical Engineering Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology Hunan University 410082 Changsha P.R. China
| | - Ying Hua
- College of Chemistry and Chemical Engineering Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology Hunan University 410082 Changsha P.R. China
| | - Xin Fu
- College of Chemistry and Chemical Engineering Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology Hunan University 410082 Changsha P.R. China
| | - Jie Liu
- College of Chemistry and Chemical Engineering Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology Hunan University 410082 Changsha P.R. China
- State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan University 410082 Changsha P.R. China
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9
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Manfredi N, Decavoli C, Boldrini CL, Dolla TH, Faroldi F, Sansone F, Montini T, Baldini L, Fornasiero P, Abbotto A. Multibranched Calix[4]arene‐Based Sensitizers for Efficient Photocatalytic Hydrogen Production. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001296] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Norberto Manfredi
- Department of Materials Science and Solar Energy Research Center MIB-SOLAR University of Milano-Bicocca INSTM Milano-Bicocca Research Unit Via Cozzi 55 20125 Milano Italy
| | - Cristina Decavoli
- Department of Materials Science and Solar Energy Research Center MIB-SOLAR University of Milano-Bicocca INSTM Milano-Bicocca Research Unit Via Cozzi 55 20125 Milano Italy
| | - Chiara Liliana Boldrini
- Department of Materials Science and Solar Energy Research Center MIB-SOLAR University of Milano-Bicocca INSTM Milano-Bicocca Research Unit Via Cozzi 55 20125 Milano Italy
| | - Tarekegn Heliso Dolla
- Department of Chemical and Pharmaceutical Sciences INSTM Trieste Research Unit and ICCOM-CNR Trieste Research Unit University of Trieste Via L. Giorgieri 1 34127 Trieste Italy
| | - Federica Faroldi
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale Università di Parma Parco Area delle Scienze 17/A 43124 Parma Italy
| | - Francesco Sansone
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale Università di Parma Parco Area delle Scienze 17/A 43124 Parma Italy
| | - Tiziano Montini
- Department of Chemical and Pharmaceutical Sciences INSTM Trieste Research Unit and ICCOM-CNR Trieste Research Unit University of Trieste Via L. Giorgieri 1 34127 Trieste Italy
| | - Laura Baldini
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale Università di Parma Parco Area delle Scienze 17/A 43124 Parma Italy
| | - Paolo Fornasiero
- Department of Chemical and Pharmaceutical Sciences INSTM Trieste Research Unit and ICCOM-CNR Trieste Research Unit University of Trieste Via L. Giorgieri 1 34127 Trieste Italy
| | - Alessandro Abbotto
- Department of Materials Science and Solar Energy Research Center MIB-SOLAR University of Milano-Bicocca INSTM Milano-Bicocca Research Unit Via Cozzi 55 20125 Milano Italy
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10
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Huang JF, Lei Y, Luo T, Liu JM. Photocatalytic H 2 Production from Water by Metal-free Dye-sensitized TiO 2 Semiconductors: The Role and Development Process of Organic Sensitizers. CHEMSUSCHEM 2020; 13:5863-5895. [PMID: 32897637 DOI: 10.1002/cssc.202001646] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 08/28/2020] [Indexed: 06/11/2023]
Abstract
The utilization of solar energy to produce hydrogen from water is showing increased importance and desirability in the field of artificial photosynthesis to produce clean and sustainable fuels. In a typical three-component dye-sensitized semiconductor system for photocatalysis, the dye sensitizer plays an essential role of energy antenna for harvesting visible light and promoting the reduction reaction to generate hydrogen. In recent decades, a lot of attention has focused on metal-free organic sensitizers, which have the advantages of low cost, high molar extinction coefficient, good modifiability and, most importantly, ability to avoid the use of noble metal ions. This Review enumerates the design strategies, specific properties and photocatalytic performances of metal-free sensitizers in the past 30 years and concludes their evolution process. The advantages of different types of metal-free sensitizers are highlighted and the instructively enlightening experiences are systematic summarized.
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Affiliation(s)
- Jian-Feng Huang
- School of Materials Science and Engineering, Sun Yat-sen University, 510275, Guangzhou, P.R. China
| | - Yang Lei
- School of Materials Science and Engineering, Sun Yat-sen University, 510275, Guangzhou, P.R. China
| | - Teng Luo
- School of Materials Science and Engineering, Sun Yat-sen University, 510275, Guangzhou, P.R. China
| | - Jun-Min Liu
- School of Materials Science and Engineering, Sun Yat-sen University, 510275, Guangzhou, P.R. China
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11
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Jo JH, Choi S, Cheong H, Shin JY, Kim CH, Cho DW, Son H, Pac C, Kang SO. Ancillary Ligand Effects on Heteroleptic Ir
III
Dye in Dye‐Sensitized Photocatalytic CO
2
Reduction: Photoaccumulation of Charges on Arylated Bipyridine Ligand and Its Control on Catalytic Performance. Chemistry 2020; 26:16733-16754. [DOI: 10.1002/chem.202002575] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Indexed: 12/14/2022]
Affiliation(s)
- Ju Hyoung Jo
- Department of Advanced Materials Chemistry Korea University Sejong 30019 South Korea
| | - Sunghan Choi
- Department of Advanced Materials Chemistry Korea University Sejong 30019 South Korea
| | - Ha‐Yeon Cheong
- Department of Advanced Materials Chemistry Korea University Sejong 30019 South Korea
| | - Jae Yoon Shin
- Department of Advanced Materials Chemistry Korea University Sejong 30019 South Korea
| | - Chul Hoon Kim
- Department of Advanced Materials Chemistry Korea University Sejong 30019 South Korea
| | - Dae Won Cho
- Department of Advanced Materials Chemistry Korea University Sejong 30019 South Korea
| | - Ho‐Jin Son
- Department of Advanced Materials Chemistry Korea University Sejong 30019 South Korea
| | - Chyongjin Pac
- Department of Advanced Materials Chemistry Korea University Sejong 30019 South Korea
| | - Sang Ook Kang
- Department of Advanced Materials Chemistry Korea University Sejong 30019 South Korea
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12
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Huang J, Gallucci JC, Turro C. Panchromatic dirhodium photocatalysts for dihydrogen generation with red light. Chem Sci 2020; 11:9775-9783. [PMID: 34094240 PMCID: PMC8162114 DOI: 10.1039/d0sc03114c] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
A series of three dirhodium complexes cis-[Rh2(DPhB)2(bncn)2](BF4)2 (1, DPhB = diphenylbenzamidine; bncn = benzocinnoline), cis-[Rh2(DPhTA)2(bncn)2](BF4)2 (2, DPhTA = diphenyltriazenide), and cis-[Rh2(DPhF)2(bncn)2](BF4)2 (3, DPhF = N,N′-diphenylformamidinate) shown to act as single-molecule photocatalysts for H2 production was evaluated. Complexes 1–3 are able to generate H2 in the absence of any other catalyst in homogenous acidic solution upon irradiation with red light in the presence of the sacrificial electron donor BNAH (1-benzyl-1,4-dihydronicotinamide). The excited state of each complex is reductively quenched by BNAH, producing the corresponding one-electron reduced complex. The latter is also able to absorb a photon and oxidize another BNAH molecule, producing the doubly-reduced, activated form of the catalyst that is able to generate H2. The present work shows the effect of substitution on the bridging ligands on the driving force for reductive quenching and hydricity of the proposed active intermediate, both of which affect the efficiency of hydrogen production. Complexes 1–3 operate following a double reductive quenching mechanism and, importantly, are active with red light. This work lays the foundation for the design of single-molecule photocatalysts that operate from the ultraviolet to the near-infrared, such that solar photons throughout this entire range are harnessed and utilized for solar energy conversion. Three dirhodium complexes cis-[Rh2(DPhB)2(bncn)2](BF4)2, cis-[Rh2(DPhTA)2(bncn)2](BF4)2 and cis-[Rh2(DPhF)2(bncn)2](BF4)2 are shown to act as single-molecule photocatalysts for H2 production.![]()
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Affiliation(s)
- Jie Huang
- Department of Chemistry and Biochemistry, The Ohio State University Columbus OH 43210 USA
| | - Judith C Gallucci
- Department of Chemistry and Biochemistry, The Ohio State University Columbus OH 43210 USA
| | - Claudia Turro
- Department of Chemistry and Biochemistry, The Ohio State University Columbus OH 43210 USA
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