Effect of the linkages on the self-assembly and photophysical properties of 4,7-diphenyl-2,1,3-benzothiadiazole-based luminescent polycatenars
作者:Jinliang Hu、Yulong Xiao、Qing Chang、Hongfei Gao、Xiaohong Cheng
DOI:10.1016/j.molliq.2019.04.121
日期:2019.7
linkages had great effect on their self-assembly and photophycial properties. Both ether and amide compounds were mesogens, while the ester compounds were non-mesogens. The ether compounds displayed Colhex/p6mm phases, while the amide compound displayed two kinds of columnar phases i.e. columnar rectangular phase with p2mm and columnar hexagonal phase with p6mm lattices depending on temperature. The column
三个系列的4,7-二苯基-2,1,3-苯并噻二唑(DBTD)基聚类,其中包含与3,4,5-三烷氧基苯单元相连的中心4,7-二苯基-2,1,3-苯并噻二唑部分关键步骤是通过Suzuki偶联反应合成通过醚(-OCH 2-),酯(-OOC-)或酰胺(-HNCO-)连接的两端。连接的极性对它们的自组装和光物理性质有很大的影响。醚和酰胺化合物都是介晶,而酯化合物是非介晶。醚类化合物显示Col hex / p 6 mm相,而酰胺类化合物显示两种柱状相,即p的柱状矩形相。2 mm的柱状六方相,具有p 6 mm的晶格,具体取决于温度。柱相可以在电场中或在机械剪切下对齐。醚和酰胺化合物显示出明显的红移最大吸收和发射。在固态和凝胶态下,醚和酰胺化合物均为黄色发光,而酯化合物均为绿色发光。