作者:Koushik Venkatesan、Paul H. J. Kouwer、Shigeyuki Yagi、Peter Müller、Timothy M. Swager
DOI:10.1039/b714291a
日期:——
A series of liquid crystals have been synthesized and studied based upon mononuclear ortho-platinated rod-like heteroaromatic and 1,3-diketonate ligands. The liquid crystalline properties of these molecules were investigated using polarized light optical microscopy, differential scanning calorimetry, single crystal X-ray diffraction, and powder X-ray diffraction. Increasing the number of alkyl chains attached to the 1,3-diketonate units resulted in a transition from lamellar (SmA) to hexagonal columnar phases (Colh). The 2-thienylpyridine units were previously unexplored in metallomesogenic complexes and these studies extend the utility of ortho-platinated 2-phenylpyridines and 2-thienylpyridines to produce columnar liquid crystalline phases. The platinum complexes all display photoluminescence and are of interest for electrooptical applications.
一系列基于单核邻铂化杆状杂芳烃和1,3-二酮配体的液晶已被合成和研究。使用偏振光显微镜、差示扫描量热法、单晶X射线衍射和粉末X射线衍射对这些分子的液晶特性进行了调查。增加与1,3-二酮基团相连的烷基链数量导致从层状相(SmA)转变为六角柱状相(Colh)。2-噻吩基吡啶单元在金属有机液晶复合物中之前并未涉及,这些研究扩展了邻铂化2-苯基吡啶和2-噻吩基吡啶的应用,产生柱状液晶相。所有铂复合物均显示出光致发光特性,并且对电光应用具有兴趣。