Mechanisms of Excimer Formation in Poly(acenaphthylene)
Ming Chen A , Kenneth P. Ghiggino A C , Trevor A. Smith A , San H. Thang B and Gerard J. Wilson BA School of Chemistry, University of Melbourne, Melbourne VIC 3010, Australia.
B CSIRO Molecular Science, Clayton South VIC 3169, Australia.
C Corresponding author. Email: ghiggino@unimelb.edu.au
Australian Journal of Chemistry 57(12) 1175-1177 https://doi.org/10.1071/CH04087
Submitted: 31 March 2004 Accepted: 10 July 2004 Published: 8 December 2004
Abstract
Excimer (excited state dimer) formation mechanisms in solution have been investigated for a series of acenaphthyl-containing compounds comprising dimers, higher oligomers, and a poly(acenaphthylene) (PAcN) homopolymer. Excimer fluorescence is observed only for dimers with a threo-diisotactic arrangement of the acenaphthyl groups indicating that interactions between nearest-neighbour chromophores are able to play a role in excimer formation in PAcN. An increase in excimer emission is observed with increasing chain length and attributed to additional excimer formation and energy migration processes.
Acknowledgements
The authors thank the Australian Research Council for financial support of this work under the Discovery Grant program. Assistance with crystal structure determinations by A/Prof. Jonathan White, University of Melbourne, is acknowledged.
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