Metal ion dependent fluorescence quenching in a crown ether bridged porphyrin–fullerene dyad

Kenneth P. Ghiggino, James A. Hutchison, D. M. Shafiqul Islan, Yasuyuki Araki, Osamu Ito, Steven J. Langford, Vei Lin Lau, Makoto Takezaki

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

The fluorescence decay kinetics from a benzonitrile solution of a dibenzo-18-crown-6 ether bridged porphyrin–fullerene dyad has been studied in the presence of a range of metal ions. Dual-exponential fluorescence decay behaviour has been attributed to conformational flexibility of the molecule influencing quenching interactions between the photo-excited porphyrin and fullerene. Additions of sodium, potassium and lithium ions significantly modulate the observed fluorescence decay processes while the larger tetrabutylammonium ion has only a minor affect. The results are discussed in terms of ion inclusion within the crown ether affecting both the bridge conformational properties and donor–acceptor electronic interactions.

Original languageEnglish
Pages (from-to)1150-1153
Number of pages4
JournalPhotochemical and Photobiological Sciences
Volume5
Issue number12
DOIs
Publication statusPublished - 2006 Dec 1

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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