Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5187570 | Polymer | 2005 | 6 Pages |
Abstract
A new anionic water-soluble polyfluorene-poly(9,9-bis(4â²-sulfonatobutyl)fluorene-co-alt-1,4-phenylene) sodium salt (PFS) was synthesized by Suzuki-coupling reaction. The anionic polyfluorene shows bright blue photoluminescence and it was found the photoluminescence could be highly quenched by a bioactive dye (Lucifer yellow cadaverine biotin-X dipotassium salt). PFS photoluminescence quenching only occurs effectively upon addition of avidin. The photoluminescence quenching process is sensitive to even subnanomolar amount of avidin (10â10Â M). The avidin facilitated photoluminescence quenching opens up opportunities of new ultra-high efficiency and rapid response biosensors based on the polyfluorene electrolyte.
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Authors
Fei Huang, Xiaohui Wang, Deli Wang, Wei Yang, Yong Cao,