Discotic Liquid Crystals: Synthesis and Characterization of Radial Polyalkynylbenzene Derivatives
作者:Sanjay Kumar Varshney、Hideo Takezoe、Doddamane Sreenivasamurthy Shankar Rao
DOI:10.1246/bcsj.81.163
日期:2008.1.15
diffraction (XRD) studies. The hexa-alkynylbenzene derivatives in a pure form had a columnar mesophase texture, and pentaalkynylphenyl and pentaalkynyltoluene derivatives remained in a highly viscous liquid state even at room temperature, whereas D-A complexes showed a the columnar hexagonal (Col h ) mesophase. The unexpected mesophase behavior of these radial polyalkynylbenzene derivatives comes from
介绍了新的径向聚炔基苯衍生物,其由 4-苯基乙炔单元与中心苯基或苯氧基或甲苯基连接部分连接而成。用偏光显微镜 (POM)、差示扫描量热法 (DSC) 研究了这些化合物的纯形式和作为供体-受体 (DA) 与 2,4,7-三硝基芴-9-one (TNF) 复合物的介晶性质和 X 射线衍射 (XRD) 研究。纯形式的六炔基苯衍生物具有柱状中间相结构,五炔基苯基和五炔基甲苯衍生物即使在室温下仍保持高粘性液体状态,而 DA 配合物则显示柱状六方 (Col h ) 中间相。