Journal article
Metal ion dependent fluorescence quenching in a crown ether bridged porphyrin–fullerene dyad
KP Ghiggino, JA Hutchison, DM Shafiqul Islan, Y Araki, O Ito, SJ Langford, VL Lau, M Takezaki
Photochemical and Photobiological Sciences | SPRINGERNATURE | Published : 2006
DOI: 10.1039/b614282f
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–acce..
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Awarded by Australian Research Council
Funding Acknowledgements
This work was supported by the Australian Research Council through the Discovery Grant Scheme (DP0210193). J.A. Hutchison and V.-L. Lau acknowledge an Australian Government Postgraduate Award. M. Takezaki acknowledges funding from the Promotion and Mutual Aid Corporation for Private Schools of Japan. Support of the Victorian Institute for Chemical Sciences High Performance Computing Facility is gratefully acknowledged.