1-(브로모아세틸)피렌을 이용한 2-에티닐피리딘의 4차염화 In-situ 중합을 통한 이온성 폴리아세틸렌 유도체의 합성과 특성

An ionic polyacetylene derivative was synthesized via in-situ quaternization polymerization of 2-ethynylpyr idine using 1-(bromoacetyl)pyrene. The monomeric N-(2-oxo-2-(pyrene)ethyl)-2-ethynylpyridinium bromide firstly formed from the reaction of 2-ethynylpyridine and 1-(bromoacetyl)pyrene was spontaneously polymerized without any additional catalyst systems to give the ionic polyacetylene in high yield (85%). The analysis results on the polymer struc ture using instrumental methods such as NMR, IR, and UV-visible spectroscopies showed that the polymer had the con jugated backbone system with the designed pyrene moieties. This polymer dissolves well in organic solvents such as DMSO, DMF, DMAc, etc. The UV-visible spectrum of polymers showed characteristic absorption peaks in visible light regions above 400 nm that were not observed in the spectrum of 2-ethylpyridine and 1-(bromoacetyl) pyrene, indicating the formation of conjugated structural polymers. The cyclic voltammogram of the polymer showed an oxidation peak at 1.0V and a reduction peak at -1.3 V, demonstrating stable electrochemical behavior during continuous scanning up to 50 cycles.