Synthesis and electro-optical properties of poly(2-ethynylpyridinium tosylate) having propagyl side chain

Novel conjugated ionic polymer was prepared by the polymerization of 2-ethy nylpyridine with propargyl tosylate in refluxing methyl alcohol. The polyme rization proceeded well in homogeneous manner to give a relatively high yie ld of polymer. The resulting poly(2-ethynylpyridinium tosylate) having prop argyl side chain [poly(EPT-P)] were hygroscopic and soluble in water, methy l alcohol, DMF, and DMSO. The inherent viscosities of the polymers were in the range of 0.08-0.29dL/g. Instrumental analyses using NMR, IR, and UV-vis ible spectroscopies and elemental analyses indicated that the resulting pol y(EPT-P) have a conjugated ionic polymer backbone carrying N-propargyl-2-py ridinium tosylate. Thermal and electro-optical properties of the polymers w ere also studied.