Photo-induced intermolecular and intramolecular electron transfer reactions between xanthene dyes and donors/acceptors

Tao Shen, Zhan gong Zhao, Hui jun Xu

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

A number of electron donors, acceptors and diads containing xanthene dyes were sythesized. When the dyes were excited, the rate constants and the efficiencies of the intermolecular and intramolecular photo-induced electron transfer reactions were determined and calculated. It is found that the photo-induced electron transfer reactions occurred between xanthene dyes and many, including very weak donors or acceptors. The rate constants of intermolecular reactions were controlled by diffusion, and influenced by the reactant concentrations. The laser flash experiments showed that for low reactant concentrations, this kind of reactions took place mainly via the triplet excited state of the dyes. If different electric charges exist with dyes and donors/acceptors, there will be static quenching of the dyes' fluorescence. The intramolecular electron transfer reactions are independent of the solution concentrations, and they may directly proceed via the singlet excited state of the dyes effectively.

Original languageEnglish (US)
Pages (from-to)137-145
Number of pages9
JournalScience in China (Scientia Sinica) Series B
Volume35
Issue number2
StatePublished - Feb 1 1992

Keywords

  • photo-induced electron transfer reaction
  • xanthene dye

ASJC Scopus subject areas

  • Environmental Science(all)
  • Engineering(all)
  • Earth and Planetary Sciences(all)

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