三聚磷腈咪唑盐离子液晶的合成及其性能研究

Synthesis and mesomorphism of novel cyclotriphosphazene-tethered imidazolium ionic liquid crystals

摘要: 通过咪唑介晶单元与三聚磷腈单元间的季铵化作用合成了一类新型三聚磷腈咪唑盐,采用偏光显微镜(POM)、差热分析(DSC)等方法对这类物质的液晶性能进行了研究,结果表明:化合物的液晶相态取决于咪唑介晶单元所含烷基链的数目.由含单烷基链的咪唑介晶单元生成的三聚磷腈咪唑盐呈现层列相;而由含三烷基链的咪唑介晶单元生成的三聚磷腈咪唑盐呈现柱相.

Abstract: Novel cyclotriphosphazene-tethered imidazolium salts were synthesized by quaternization of polycatenar imidazole mesogenic units which containing extended aromatic core,with hexakis-(4-chloromethylphenoxy)triazatriphosphinine.The mesophase behavior of such compounds was investigated.Imidazole mesogenic unit containing only one terminal chain gives rise to Smectic phases.While mesogenic unit containing three long terminal chains exhibits columnar mesophase.