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Jens Uhlig. Portrait.

Jens Uhlig

Senior lecturer

Jens Uhlig. Portrait.

Toward Highlighting the Ultrafast Electron Transfer Dynamics at the Optically Dark Sites of Photocatalysts

Author

  • Sophie Canton
  • Xiaoyi Zhang
  • Jianxin Zhang
  • Tim B. van Driel
  • Kasper S. Kjaer
  • Kristoffer Haldrup
  • Pavel Chabera
  • Tobias Harlang
  • Karina Suarez Alcantara
  • Yizhu Liu
  • Jorge Perez Tuero
  • Amelie Bordage
  • Matyas Papai
  • Gyoergy Vanko
  • Guy Jennings
  • Charles A. Kurtz
  • Mauro Rovezzi
  • Pieter Glatzel
  • Grigory Smolentsev
  • Jens Uhlig
  • Asmus O. Dohn
  • Morten Christensen
  • Andreas Galler
  • Wojciech Gawelda
  • Christian Bressler
  • Henrik T. Lemke
  • Klaus B. Moller
  • Martin M. Nielsen
  • Reiner Lomoth
  • Kenneth Wärnmark
  • Villy Sundström
Show all

Summary, in English

Building a detailed understanding of the structure function relationship is a crucial step in the optimization of molecular photocatalysts employed in water splitting schemes. The optically dark nature of their active sites usually prevents a complete mapping of the photoinduced dynamics. In this work, transient X-ray absorption spectroscopy highlights the electronic and geometric changes that affect such a center in a bimetallic model complex. Upon selective excitation of the ruthenium chromophore, the cobalt moiety is reduced through intramolecular electron transfer and undergoes a spin flip accompanied by an average bond elongation of 0.20 +/- 0.03 angstrom. The analysis is supported by simulations based on density functional theory structures (B3LYP*/TZVP) and FEFF 9.0 multiple scattering calculations. More generally, these results exemplify the large potential of the technique for tracking elusive intermediates that impart unique functionalities in photochemical devices.

Department/s

  • Chemical Physics
  • MAX IV Laboratory
  • Department of Chemistry
  • Centre for Analysis and Synthesis
  • NanoLund: Centre for Nanoscience

Publishing year

2013

Language

English

Pages

1972-1976

Publication/Series

The Journal of Physical Chemistry Letters

Volume

4

Issue

11

Document type

Journal article

Publisher

The American Chemical Society (ACS)

Topic

  • Natural Sciences
  • Physical Sciences
  • Atom and Molecular Physics and Optics
  • Chemical Sciences

Status

Published

ISBN/ISSN/Other

  • ISSN: 1948-7185