Quantification of amplified quenching for conjugated polymer microsphere systems.

TitleQuantification of amplified quenching for conjugated polymer microsphere systems.
Publication TypeJournal Article
Year of Publication2007
AuthorsLiao, JH, Swager, TM
Date Publishedjan
KeywordsAlkynes, Alkynes: chemistry, Ethers, Ethers: chemistry, Europium, Europium: chemistry, Fluorescence, Hydrophobic and Hydrophilic Interactions, Microspheres, Polystyrenes, Polystyrenes: chemistry, Spectrometry, Static Electricity, Viologens, Viologens: chemistry

A series of nonaggregating carboxylate-functionalized poly(phenylene ethynylene)s (PPEs) have been synthesized for immobilization via electrostatic adsorption onto Eu3+-polystyrene microspheres with a mean diameter of 0.2 microm. This system is shown to constitute a ratiometric system that measures fluorescence quenching with high fidelity. The fluorescence quenching properties of the polymer-coated particles in response to methyl viologen and a naphthyl-functionalized viologen have been investigated in aqueous solutions to study the influence of electrostatic and hydrophobic interactions with pentiptycene-incorporated as well as macrocycle-containing polymers.