1
|
Canton SE, Zhang X, Liu Y, Zhang J, Pápai M, Corani A, Smeigh AL, Smolentsev G, Attenkofer K, Jennings G, Kurtz CA, Li F, Harlang T, Vithanage D, Chabera P, Bordage A, Sun L, Ott S, Wärnmark K, Sundström V. Watching the dynamics of electrons and atoms at work in solar energy conversion. Faraday Discuss 2015; 185:51-68. [DOI: 10.1039/c5fd00084j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photochemical reactions performed by transition metal complexes have been proposed as viable routes towards solar energy conversion and storage into other forms that can be conveniently used in our everyday applications. In order to develop efficient materials, it is necessary to identify, characterize and optimize the elementary steps of the entire process on the atomic scale. To this end, we have studied the photoinduced electronic and structural dynamics in two heterobimetallic ruthenium–cobalt dyads, which belong to the large family of donor–bridge–acceptor systems. Using a combination of ultrafast optical and X-ray absorption spectroscopies, we can clock the light-driven electron transfer processes with element and spin sensitivity. In addition, the changes in local structure around the two metal centers are monitored. These experiments show that the nature of the connecting bridge is decisive for controlling the forward and the backward electron transfer rates, a result supported by quantum chemistry calculations. More generally, this work illustrates how ultrafast optical and X-ray techniques can disentangle the influence of spin, electronic and nuclear factors on the intramolecular electron transfer process. Finally, some implications for further improving the design of bridged sensitizer-catalysts utilizing the presented methodology are outlined.
Collapse
|
2
|
Haldrup K, Vankó G, Gawelda W, Galler A, Doumy G, March AM, Kanter EP, Bordage A, Dohn A, van Driel TB, Kjær KS, Lemke HT, Canton SE, Uhlig J, Sundström V, Young L, Southworth SH, Nielsen MM, Bressler C. Guest–Host Interactions Investigated by Time-Resolved X-ray Spectroscopies and Scattering at MHz Rates: Solvation Dynamics and Photoinduced Spin Transition in Aqueous Fe(bipy)32+. J Phys Chem A 2012; 116:9878-87. [DOI: 10.1021/jp306917x] [Citation(s) in RCA: 100] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- K. Haldrup
- Centre for Molecular Movies,
Department of Physics, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - G. Vankó
- Wigner Research Centre for Physics, Hungarian Academy Sciences, H-1525 Budapest, POB 49,
Hungary
| | - W. Gawelda
- European XFEL, Albert-Einstein Ring 19, D-22 761 Hamburg, Germany
| | - A. Galler
- European XFEL, Albert-Einstein Ring 19, D-22 761 Hamburg, Germany
| | - G. Doumy
- Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois
60439, United States
| | - A. M. March
- Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois
60439, United States
| | - E. P. Kanter
- Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois
60439, United States
| | - A. Bordage
- Wigner Research Centre for Physics, Hungarian Academy Sciences, H-1525 Budapest, POB 49,
Hungary
| | - A. Dohn
- Chemistry
Department, Danish Technical University, DK-2800 Lyngby, Denmark
| | - T. B. van Driel
- Centre for Molecular Movies,
Department of Physics, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - K. S. Kjær
- Centre for Molecular Movies,
Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - H. T. Lemke
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California
94025, United States
| | | | | | | | - L. Young
- Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois
60439, United States
| | - S. H. Southworth
- Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois
60439, United States
| | - M. M. Nielsen
- Centre for Molecular Movies,
Department of Physics, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - C. Bressler
- European XFEL, Albert-Einstein Ring 19, D-22 761 Hamburg, Germany
| |
Collapse
|