基于多金属氧簇的手性超分子液晶  

Chiral Supramolecular Liquid Crystal Based on Polyoxometalate

作　　者：李志军 张静[1,3] 魏学红[2] 蔡瑾[1] 吴立新[3] 

机构地区：[1]山西大学应用化学研究所,太原030006 [2]山西大学化学化工学院,太原030006 [3]吉林大学超分子结构与材料国家重点实验室,长春130012

出　　处：《无机化学学报》2018年第2期353-358,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21502107;21574057);山西省自然科学基金(No.2014021019-5);山西省高校科技创新项目(No.2016118;016117);山西大学引进人才建设项目(No.020451801001);山西大学大型科学仪器中心资助项目

摘　　要：以手性诱导为切入点,采用含胆固醇基团的季铵盐表面活性剂静电包覆缺位的Keggin结构多金属氧簇K7PW11O39·12H2O,得到了手性介晶阳离子修饰的多金属氧簇杂化超分子复合物。圆二色谱对该复合物光学活性的表征说明外围的手性表面活性剂可以通过静电相互作用诱导复合物显示出手性。利用差示扫描量热曲线法、偏光显微镜观察和变温X射线衍射详细研究了该复合物的热性质和相行为,结果表明该复合物在较宽的温度范围内具有热致液晶性质,是一种典型的手性近晶A相离子液晶材料。Taken chiral induction as the breakthrough point, the cholesterol-containing ammonium surfactant is employed to encapsulate the lacunary Keggin-type polyoxometalate, which yielding a chiral mesogenic cations modified polyoxometalate-containing hybrid supramolecular complex. The complex has optical activities which are induced by the peripheral chiral surfactants through electrostatic interactions, as demonstrated by the circular dichroism spectrum. The thermotropic behaviors of the complex are characterized by differential scanning calorimetry, polarized optical microscopy, and temperature-dependent X-ray diffraction, which indicating that the complex has liquid crystalline properties with a typical SmA＊ mesophase over a wide temperature range.

关 键 词：多金属氧簇 液晶 手性超分子 自组装 表面活性剂 

分 类 号：O611.3[理学—无机化学]