Poly-(2-ethynylpyridinum bromide) (PEPBP) having propargyl side chains was
prepared by the direct polymerization of 2-ethynylpyridine and propargyl br
omide under mild reaction conditions without any initiator and catalysts. T
he polymerization proceeded well to give PEPBP with propargyl side chains i
n relatively high yields. Various spectral data for the polymer structure i
ndicated that the conjugated polymer system having N-propargylpyridinum sub
stituent was formed. This ionic polymer was completely soluble in water, me
thanol, dimethylformamide, dimethyl sulfoxide, and N,N-dimethylacetamide an
d well processable into thin homogeneous film. The photoluminescence intens
ity (lambda (max) = 760 nm.) of this polymer increased as the temperature w
as increased, At 1 KHz and room temperature, this polymer has k ' = 2.9 and
sigma = 7.3 X 10(-10) (S/cm). (C) 2001 John Wiley & Sons, Inc.