Effect of bridge length on injection rates in Ru(II) polypyridyl complexes anchored to nanocrystalline TiO2 through rigid-rod linkers

Elena Galoppini, Piotr Piotrowiak, Dong Wang, M. Myahkostupov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Rigid-rod linkers were used to anchor Ru(II) polypyridyl complexes to the surface of TiO2 (anatase) thin films and study the effect of bridge length on the injection rates. The linkers were made of p-phenyleneethynylene (Ph-E)n bridges carrying two COOR anchoring groups on one end, and were capped with Ru(II) polypyridyl complexes as the sensitizing chromophores. The rigid-rod sensitizers were bound to TiO2 anatase mesoporous thin films. The fully conjugated bridge influences the spectral properties of the Ru complexes. The metal-to-ligand charge-transfer MLCT excited states were long-lived (∼ 2 μs) and there is evidence for delocalization onto the rigid-rod linker. The injection rates on TiO2 were found to be dependent on the bridge length. Biexponential injection rates, weak distance dependence and small attenuation factor were observed.

Original languageEnglish (US)
Title of host publicationElectron Transfer in Nanomaterials - Proceedings of the International Symposium
Pages309-316
Number of pages8
StatePublished - 2006
Event205th Electrochemical Society Meeting - San Antonio, TX, United States
Duration: May 9 2004May 14 2004

Publication series

NameProceedings - Electrochemical Society
VolumePV 2004-22

Other

Other205th Electrochemical Society Meeting
Country/TerritoryUnited States
CitySan Antonio, TX
Period5/9/045/14/04

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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