Preparation of Poly(2,5-diheptyl-1,4-phenylenevinylene) by Sulfonium Salt Pyrolysis
作者:Yoriko Sonoda、Kyoji Kaeriyama
DOI:10.1246/bcsj.65.853
日期:1992.3
Poly(2,5-diheptyl-1,4-phenylenevinylene) (1) was prepared by the sulfonium salt pyrolysis procedure. Tough films of 1 were obtained by pyrolysis of its sulfonium salt precursor film. Due to flexible side chains, 1 was soluble in organic solvents such as chloroform. The molecular weights were Mn = 3.8−4.7 × 104 and Mw = 1.4−1.8 × 105. The ratio of trans to cis olefinic units was found to be 93 : 7 from the 1H NMR spectrum. Two arylmethylene peaks suggested that there were two kinds of stereochemically different methylene groups. Although the peak energy in the absorption spectra was almost identical to those of poly(1,4-phenylenevinylene) (PPV), the electrical conductivity of 1 was much lower than that of PPV.
聚(2,5-二庚基-1,4-苯乙烯) (1) 是通过季铵盐热解法制备的。通过热解其季铵盐前驱体薄膜获得了坚韧的薄膜。由于有柔性的侧链,1可溶于氯仿等有机溶剂。其分子量为 Mn = 3.8−4.7 × 10^4 和 Mw = 1.4−1.8 × 10^5。通过1H NMR光谱发现反式与顺式烯烃单元的比例为93 : 7。两个芳烯亚甲基峰表明存在两种立体化学上不同的亚甲基。尽管吸收光谱中的峰值能量几乎与聚(1,4-苯乙烯) (PPV) 相同,但1的电导率远低于PPV。