Synthesis and properties of conducting polymers from propargylammonium salts by transition metal catalysts

Summary form only given. Novel conjugated ionic polymers from propargylamonium bromides were synthesized and characterized. The ionic monomers used are as follows: HC/spl equiv/CCH/sub 2//sup +/NH/sub 3/Br/sup -/, HC/spl equiv/CCH/sub 2//sup +/N(CH/sub 3/)2(CH/sub 2/Ph)Br/sup -/, (HC/spl equiv/CCH/sub 2/)/sup 2//sup +/NH2Br/sup -/. These monomers were easily polymerized by PdCl/sub 2/ and PtCl/sub 2/ to give a high yield of polymer. In most cases, the catalytic activity of Mo-based catalysts was found to be greater than that of W-based catalysts. The infrared spectra of the resulting conjugated ionic polymers showed neither the acetylenic /spl equiv/C-H stretching nor the C/spl equiv/C stretching frequencies. Instead the conjugated double bond stretching frequency of polymer backbone was newly oberserved at about 1630cm/sup -1/. The resulting polymers were mostly insoluble in organic solvents, and brown or black powder. The electrical conductivities of iodine-doped ionic polymers increased with doping time and reached the value of 10/sup -3//spl tilde/10/sup -2/spl Omega//sup -1/cm/sup -1/. The thermal and morphological properties of the conjugated ionic polymers were also studied.