Solvent Tunable Optical Properties of a Polymerized Vinyl- and Thienyl-Substituted Ionic Liquid
作者:Gregory A. Becht、Sungwon Lee、Sönke Seifert、Millicent A. Firestone
DOI:10.1021/jp102904e
日期:2010.11.18
Thermal free radical polymerization of a self-assembled, bifunctional imidazolium-based ionic liquid (IL) monomer bearing both vinyl and thienyl groups is reported FT-IR spectroscopy proves that the polymerization occurs through both the vinyl and thienyl groups The polymer is resistant to swelling in water and common organic solvents The as-synthesized polymer can be readily chemically doped and de-doped Small-angle X-ray scattering studies indicate that the dried polymer adopts a weakly ordered lamellar structure The p-doped, ethanol-solvated polymer undergoes a structural conversion to a nonlamellar phase The absorption and photoluminescence spectra can be modulated in both the neutral (thiophene) and p-doped states depending on whether the polymer is dry or ethanol-solvated The results demonstrate the possibility of incorporating solvent responsive optical characteristics in a it-conjugated polymer