Photoinduced electron transfer in a ferrocene-distyryl BODIPY dyad and a ferrocene-distyryl BODIPY-C60 triad

Jian Yong Liu, Mohamed E. El-Khouly, Shunichi Fukuzumi, Dennis K.P. Ng

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

A ferrocene-distyryl BODIPY dyad and a ferrocene-distyryl BODIPY-C 60 triad are synthesized and characterized. Upon photoexcitation at the distyryl BODIPY unit, these arrays undergo photoinduced electron transfer to form the corresponding charge-separated species. Based on their redox potentials, determined by cyclic voltammetry, the direction of the charge separation and the energies of these states are revealed. Femtosecond transient spectroscopic studies reveal that a fast charge separation (k CS=1.0×1010 s-1) occurs for both the ferrocene-distyryl BODIPY dyad and the ferrocene-distyryl BODIPY-C60 triad, but that a relatively slow charge recombination is observed only for the triad. The lifetime of the charge-separated state is 500 ps. Charge recombination of the dyad and triad leads to population of the triplet excited sate of ferrocene and the ground state, respectively.

Original languageEnglish
Pages (from-to)2030-2036
Number of pages7
JournalChemPhysChem
Volume13
Issue number8
DOIs
StatePublished - 4 Jun 2012

Keywords

  • boron dipyrromethenes
  • donor-acceptor systems
  • electron transfer
  • ferrocene
  • fullerenes

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