Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5189129 | Polymer | 2006 | 6 Pages |
Abstract
A novel cationic fluorene-containing water-soluble poly(p-phenyleneethynylene) (PPE) derivative, poly[(9,9-bis{6â²-[(N,N-diethyl)-N-methylammonium]hexyl}-2,7-fluorenyleneethynylene)-alt-co-(2,5-bis{3â²-[(N,N-diethyl)-N-methylammonium]-1â²-oxapropyl}-1,4-phenylene)] tetraiodide (P1â²), was synthesized through Sonogashira reaction and a post-polymerization treatment. P1â² emits bright blue fluorescence in H2O with a high photoluminescence quantum yield (Φpl=26%). Studies on the optical properties and quenching experiments with Fe(CN)64â in H2O and MeOH show that P1â² presents minor aggregation and high Stern-Volmer constant (Ksv=2.4Ã108 Mâ1) in aqueous solution. The remarkably reduced tendency towards aggregation, relative to previously reported water-soluble PPEs, made the optical properties of P1â² almost insensitive to the disturbance from the common ions (non-quencher) in the solution.
Related Topics
Physical Sciences and Engineering
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Authors
Yan-Qin Huang, Qu-Li Fan, Guang-Wei Zhang, Yi Chen, Xiao-Mei Lu, Wei Huang,