【摘要】 以四辛基溴化铵为相转移催化剂,以1,4,5,8-萘四甲酸为原料,分别与溴代丁烷和溴代辛烷反应制备了1,4,5,8-萘四甲酸丁酯和1,4,5,8-萘四甲酸辛酯。采用紫外可见光谱和荧光光谱等测试技术研究了2种化合物的光谱性质。结果表明,2种化合物在溶液中有可能形成激基缔合物,采用DSC和偏光显微镜测试技术研究了其热行为和液晶性质。结果发现,2种化合物均表现出热致液晶性。更多还原

【Abstract】 Two novel compounds, 1,4,5,8-tetra-(4-n-butoxy-carbonyl)-naphthalene and 1,4,5,8-tetra-(8-n-octoxy-carbonyl)-naphthalene, were prepared from 1,4,5,8-naphthalene tetracarboxylic acid(NTA) with tetraoctane-ammonium bromide as a phase transfer catalyst. Their UV-Vis and fluorescent spectra suggested that the two compounds formed excimer complex in CH2Cl2, respectively. Their liquid crystalline behavior was investigated by DSC and polarized optical microscopy and their thermotropic liquid crystalline behavior was observed.更多还原