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Abstract
This minireview aims at providing a complete survey concerning the use of X-ray absorption spectroscopy (XAS) for time-resolved studies of electrochemical and photoelectrochemical phenomena. We will see that time resolution can range from the femto-picosecond to the second (or more) scale and that this joins the valuable throughput typical of XAS, which allows for determining the oxidation state of the investigated element, together with its local structure. We will analyze four different techniques that use different approaches to exploit the in real time capabilities of XAS. These are quick-XAS, energy dispersive XAS, pump & probe XAS and fixed-energy X-ray absorption voltammetry. In the conclusions, we will analyze possible future perspectives for these techniques.
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3
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Ponseca CS, Chábera P, Uhlig J, Persson P, Sundström V. Ultrafast Electron Dynamics in Solar Energy Conversion. Chem Rev 2017; 117:10940-11024. [DOI: 10.1021/acs.chemrev.6b00807] [Citation(s) in RCA: 211] [Impact Index Per Article: 30.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Carlito S. Ponseca
- Division
of Chemical Physics, Chemical Center, and ‡Theoretical Chemistry Division,
Chemical Center, Lund University, Box 124, Lund SE-221 00, Sweden
| | - Pavel Chábera
- Division
of Chemical Physics, Chemical Center, and ‡Theoretical Chemistry Division,
Chemical Center, Lund University, Box 124, Lund SE-221 00, Sweden
| | - Jens Uhlig
- Division
of Chemical Physics, Chemical Center, and ‡Theoretical Chemistry Division,
Chemical Center, Lund University, Box 124, Lund SE-221 00, Sweden
| | - Petter Persson
- Division
of Chemical Physics, Chemical Center, and ‡Theoretical Chemistry Division,
Chemical Center, Lund University, Box 124, Lund SE-221 00, Sweden
| | - Villy Sundström
- Division
of Chemical Physics, Chemical Center, and ‡Theoretical Chemistry Division,
Chemical Center, Lund University, Box 124, Lund SE-221 00, Sweden
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Cao J, Zhou Y. Excited state relaxation processes of H 2-evolving Ru-Pd supramolecular photocatalysts containing a linear or non-linear bridge: a DFT and TDDFT study. Phys Chem Chem Phys 2017; 19:11529-11539. [PMID: 28425524 DOI: 10.1039/c6cp07857e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
In this study, the early-time excited state relaxation processes of bimetallic Ru-Pd supramolecular photocatalysts containing a linear 2,2':5',2''-terpyridine or a nonlinear 2,2':6',2''-terpyridine bridging ligand (BL) were investigated by density functional theory (DFT) and time-dependent DFT (TDDFT) approaches. The bridge based metal-to-ligand charge transfer triplet (3MLCT) state of the metal complex containing a linear bridging ligand was calculated to be the lowest energy triplet (T1) state which is closely related to the photocatalytic H2 production, while for that having a nonlinear bridging ligand, the T1 state is a Ru metal-centered (MC) triplet (3MCRu) state that is short-lived and rapidly decays to the ground electronic state (S0). Our simulation provides an alternative explanation for the smaller interligand electron transfer (ILET) rate in the Ru-Pd complex containing a linear bridge compared to the corresponding monometal Ru complex. Based on the calculation, we also suggest that the successive 3MLCT → 3MCRu → S0 conversion is responsible for the inefficiency of the Ru-Pd complex containing nonlinear bridge as a photocatalyst for H2 production. This study provides theoretical insights into the key steps of the photoinduced processes of the bimetallic H2-evolving supramolecular photocatalyst.
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Affiliation(s)
- Jun Cao
- Guizhou Provincial Key Laboratory of Computational Nano-material Science, Guizhou Synergetic Innovation Center of Scientific Big Data for Advanced Manufacturing Technology, Guizhou Education University, Guiyang, Guizhou 550018, China
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Gao D, Aly SM, Karsenti PL, Brisard G, Harvey PD. Application of the boron center for the design of a covalently bonded closely spaced triad of porphyrin-fullerene mediated by dipyrromethane. Dalton Trans 2017; 46:6278-6290. [DOI: 10.1039/c7dt00472a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Charge separation stabilization is achieved by placing porphyrin and C60 at the two ends of central BODIPY.
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Affiliation(s)
- Di Gao
- Departement de chimie
- Université de Sherbrooke
- Sherbrooke
- Canada J1K 2R1
| | - Shawkat M. Aly
- Departement de chimie
- Université de Sherbrooke
- Sherbrooke
- Canada J1K 2R1
| | | | - Gessie Brisard
- Departement de chimie
- Université de Sherbrooke
- Sherbrooke
- Canada J1K 2R1
| | - Pierre D. Harvey
- Departement de chimie
- Université de Sherbrooke
- Sherbrooke
- Canada J1K 2R1
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Kajouj S, Marcélis L, Lemaur V, Beljonne D, Moucheron C. Photochemistry of ruthenium(ii) complexes based on 1,4,5,8-tetraazaphenanthrene and 2,2′-bipyrazine: a comprehensive experimental and theoretical study. Dalton Trans 2017; 46:6623-6633. [DOI: 10.1039/c7dt00620a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Comprehensive study of ruthenium complexes based on 2,2′-bipyrazine and 1,4,5,8-tetraazaphenanthrene, which can be used as photoreactive materials for biomedical applications.
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Affiliation(s)
- Sofia Kajouj
- Organic Chemistry and Photochemistry
- Université Libre de Bruxelles
- (U. L. B.)
- Bruxelles
- Belgium
| | - Lionel Marcélis
- Organic Chemistry and Photochemistry
- Université Libre de Bruxelles
- (U. L. B.)
- Bruxelles
- Belgium
| | - Vincent Lemaur
- Laboratory for Chemistry of Novel Materials
- University of Mons (UMons)
- 7000 Mons
- Belgium
| | - David Beljonne
- Laboratory for Chemistry of Novel Materials
- University of Mons (UMons)
- 7000 Mons
- Belgium
| | - Cécile Moucheron
- Organic Chemistry and Photochemistry
- Université Libre de Bruxelles
- (U. L. B.)
- Bruxelles
- Belgium
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Zheng K, Abdellah M, Zhu Q, Kong Q, Jennings G, Kurtz CA, Messing ME, Niu Y, Gosztola DJ, Al-Marri MJ, Zhang X, Pullerits T, Canton SE. Direct Experimental Evidence for Photoinduced Strong-Coupling Polarons in Organolead Halide Perovskite Nanoparticles. J Phys Chem Lett 2016; 7:4535-4539. [PMID: 27790918 DOI: 10.1021/acs.jpclett.6b02046] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Echoing the roaring success of their bulk counterparts, nano-objects built from organolead halide perovskites (OLHP) present bright prospects for surpassing the performances of their conventional organic and inorganic analogues in photodriven technologies. Unraveling the photoinduced charge dynamics is essential for optimizing the optoelectronic functionalities. However, mapping the carrier-lattice interactions remains challenging, owing to their manifestations on multiple length scales and time scales. By correlating ultrafast time-resolved optical and X-ray absorption measurements, this work reveals the photoinduced formation of strong-coupling polarons in CH3NH3PbBr3 nanoparticles. Such polarons originate from the self-trapping of electrons in the Coulombic field caused by the displaced inorganic nuclei and the oriented organic cations. The transient structural change detected at the Pb L3 X-ray absorption edge is well-captured by a distortion with average bond elongation in the [PbBr6]2- motif. General implications for designing novel OLHP nanomaterials targeting the active utilization of these quasi-particles are outlined.
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Affiliation(s)
- Kaibo Zheng
- Department of Chemical Physics and Nanolund, Lund University , Box 124, 22100 Lund, Sweden
- Gas Processing Center, College of Engineering, Qatar University , PO Box 2713, Doha, Qatar
| | - Mohamed Abdellah
- Department of Chemical Physics and Nanolund, Lund University , Box 124, 22100 Lund, Sweden
- Department of Chemistry, Qena Faculty of Science, South Valley University , Qena 83523, Egypt
| | - Qiushi Zhu
- Department of Chemical Physics and Nanolund, Lund University , Box 124, 22100 Lund, Sweden
- Gas Processing Center, College of Engineering, Qatar University , PO Box 2713, Doha, Qatar
| | - Qingyu Kong
- X-ray Science Division, Advanced Photon Source and Materials Science Division, Argonne National Laboratory , Argonne, Illinois 60439, United States
| | - Guy Jennings
- X-ray Science Division, Advanced Photon Source and Materials Science Division, Argonne National Laboratory , Argonne, Illinois 60439, United States
| | - Charles A Kurtz
- X-ray Science Division, Advanced Photon Source and Materials Science Division, Argonne National Laboratory , Argonne, Illinois 60439, United States
| | - Maria E Messing
- Department of Solid State Physics and Nanolund, Lund University , Box 118, 22100 Lund, Sweden
| | - Yuran Niu
- MAX IV Laboratory, Lund University , Box 118, 22100 Lund, Sweden
| | - David J Gosztola
- X-ray Science Division, Advanced Photon Source and Materials Science Division, Argonne National Laboratory , Argonne, Illinois 60439, United States
| | - Mohammed J Al-Marri
- Gas Processing Center, College of Engineering, Qatar University , PO Box 2713, Doha, Qatar
| | - Xiaoyi Zhang
- X-ray Science Division, Advanced Photon Source and Materials Science Division, Argonne National Laboratory , Argonne, Illinois 60439, United States
| | - Tönu Pullerits
- Department of Chemical Physics and Nanolund, Lund University , Box 124, 22100 Lund, Sweden
| | - Sophie E Canton
- Center for Ultrafast Imaging, University of Hamburg , 22761 Hamburg, Germany
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Dohn AO, Kjær KS, Harlang TB, Canton SE, Nielsen MM, Møller KB. Electron Transfer and Solvent-Mediated Electronic Localization in Molecular Photocatalysis. Inorg Chem 2016; 55:10637-10644. [DOI: 10.1021/acs.inorgchem.6b01840] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Asmus O. Dohn
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kgs Lyngby, Denmark
| | - Kasper S. Kjær
- Department of Physics, Technical University of Denmark, Building 307 2800 Kgs. Lyngby, Denmark
| | - Tobias B. Harlang
- Department of Physics, Technical University of Denmark, Building 307 2800 Kgs. Lyngby, Denmark
| | - Sophie E. Canton
- Center for
Ultrafast Imaging, University of Hamburg, 22761 Hamburg, Germany
| | - Martin M. Nielsen
- Department of Physics, Technical University of Denmark, Building 307 2800 Kgs. Lyngby, Denmark
| | - Klaus B. Møller
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kgs Lyngby, Denmark
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