Synthesis and Properties of an Ionic Conjugated Polymer via the Uncatalyzed Polymerization of 2-Ethynylpyridine Using Bromocholine Bromide.
A new ionic polyacetylene was synthesized via the uncatalyzed polymerization of 2-ethynylpyridine using bromocholine bromide in high yield. The activated acetylenic triple bond of N-bromocholine-2-ethynylpyridinium bromide, formed at first quaternarization process, was found to be susceptible to linear polymerization. The polymer structure was characterized by various instrumental methods to have the polyacetylene backbone structure with the designed substituent. The inherent viscosities of the resulting polymers were in the range of 0.10-0.15 dL/g and X-ray diffraction analysis data indicated that this polymer is mostly amorphous. The electro-optical and electrochemical properties were measured and discussed. The polymer exhibited the irreversible electrochemical behaviors between the doping and undoping peaks.
Yeong-Soon
YS
Gal
Sung-Ho
SH
Jin
Kwon Taek
KT
Lim
Jong Wook
JW
Park