2-Ethynylpyridine과 fluorinated carboxylic acid를 이용한 치환된 polyacetylene의 합성과 특성 연구

Abstract

In this study, conjugated ionic polymers of poly(2-ethynylpyridinium) (P2EP) was prepared by polymerization of 2-ethynylpyridine and fluorinated carboxylic acid under different conditions as solvent, mole ratio and polymerization time. The fluorinated carboxylic acid of different number of fluorine such as trifluoroacetic acid(CF3COOH), heptafluorobutyric acid(CF3(CF2)2COOH) and pentadecafluorooctanoic acid(CF3(CF2)6COOH) were used in this designed experiment. The spectra were obtained successfully with conjugated polymer backbones from the result of polymerization. In addition, the polymerization of 2EP in supercritical carbon dioxide was obtained similar result with using organic solvent. The P2EP were obtained reddish solid, which soluble in polar organic solvent such as water, acetone, DMF, and DMSO but insoluble in non-polar solvents such as ethyl ether, CCl4 and toluene because of natural ionic polymer. The chemical structures and compositions of the P2EP were characterized by nuclear magnetic resonance spectroscopy (NMR), fourier transform infrared spectroscopy (FT-IR), and UV/Vis spectrometer. The fluorescence spectra of P2EP were obtained by photoluminescence spectrophotometer (PL).