Tunable multicolour emissions of polymeric ionic films carrying proper fluorescent dye moieties

Abstract

Polymeric ionic liquid (PIL) films carrying fluorescent dye moieties were prepared by radical copolymerization of polymerizable ionic liquids with appropriate polymerizable fluorescent dye derivatives. The films carrying rhodamine (previously reported), 7-(diethylamino)coumarin-3-carboxylic acid (DEAC), and pyranine moieties exhibited the three primary color emissions, i.e., red, green, and blue, respectively, by excitation at the wide wavelength areas. By incorporating possible combinations of the dye moieties in the PIL backbones, the PIL films, which emitted tunable multicolors, were successfully obtained.