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.
|Pages (from-to)||1150 - 1153|
|Number of pages||4|
|Journal||Photochemical and Photobiological Sciences|
|Publication status||Published - 2006|
Ghiggino, K. P., Hutchison, J. A., Shafiqul Islan, D-M., Araki, Y., Ito, O., Langford, S. J., Lau, V-L., & Takezaki, M. (2006). Metal ion dependent fluorescence quenching in a crown ether bridged porphyrin-fullerene dyad. Photochemical and Photobiological Sciences, 5(12), 1150 - 1153.