Structural dynamics studies on photoinduced interfacial electron transfer using ultrafast X-ray spectroscopy

Xiaoyi Zhang; Grigory Smolentse; Sophie Canton; Jianchang Guo; Villy Sundström; Lin X. Chen; Lin X. Chen; Klaus Attenkofer; Charles Kurtz; Guy Jennings

doi:10.1364/ICUSD.2012.IW2D.7

Research in Optical Sciences
OSA Technical Digest (Optica Publishing Group, 2012),
paper IW2D.7
•https://doi.org/10.1364/ICUSD.2012.IW2D.7

Structural dynamics studies on photoinduced interfacial electron transfer using ultrafast X-ray spectroscopy

Xiaoyi Zhang, Grigory Smolentse, Sophie Canton, Jianchang Guo, Villy Sundström, Lin X. Chen, Klaus Attenkofer, Charles Kurtz, and Guy Jennings

International Conference on Ultrafast Structural Dynamics 2012

Berlin Germany
19–21 March 2012
ISBN: 978-1-55752-939-8

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X-ray Absorption (IW2D)

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X. Zhang, G. Smolentse, S. Canton, J. Guo, V. Sundström, L. X. Chen, K. Attenkofer, C. Kurtz, and G. Jennings, "Structural dynamics studies on photoinduced interfacial electron transfer using ultrafast X-ray spectroscopy," in Research in Optical Sciences, OSA Technical Digest (Optica Publishing Group, 2012), paper IW2D.7.

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Abstract

XTA (X-ray transient absorption) spectroscopy has been used to probe the transient structure during interfacial electron transfer between photo-sensitizer and semiconductor nanocrystals. Two sample systems have been studied, Ru(dcbpy)₂(NCS)₂ and Os(dcbpy)₂(CN)₂ (dcbpy = bis(4,4′-dicarboxy-2,2′-bipyridyl) adsorbed to TiO₂ nanoparticle surface. The photoexcited Ruthenium or Osmium polypyridyl photosensitizers inject electrons to conduction band of TiO₂ nanoparticle, resulting in interfacial charge-transfer state. Both the electronic configuration and molecular structure changes of Ruthenium and Osmium complexes in the charge-separated state have been observed.

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