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 James Langford, Vei-Lin Lau, Makoto Takezaki

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15 Citations (Scopus)


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
Issue number12
Publication statusPublished - 2006

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