Dibenzo[g,p]chrysene, a novel core for discotic liquid crystals
Dibenzo[g,p]chrysene, a novel core for discotic liquid crystals
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DOI：
10.1080/10587250290090039
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发表时间：
2002-01-01
影响因子：
0.7
通讯作者：
Varshney, SK
中科院分区：
文献类型：
--
作者：
Kumar, S;Varshney, SK
二苯并[g，p]芘是一种新型的偶联多环芳烃，是制备盘状液晶的核心片段。该新型核心的前两个衍生物是由钯催化的二苯基乙炔与2-碘二芳基环化反应制备的，然后进行氧化偶联。在这两种化合物中均观察到诱导柱状中间相形成的电荷转移相互作用。用偏光显微镜和差示扫描量热法研究了它们的亚形态行为。
Dibenzo[g,p]chrysene, a new pi-conjugated polycyclic aromatic hydrocarbon, has been found to function as the core fragment for the preparation of discotic liquid crystals. First two derivatives of this novel core were prepared by a palladium-catalyzed annulation reaction of diphenylacetylenes with 2-iodobiaryls, followed by oxidative coupling. Charge-transfer interactions that induced columnar mesophase formation was observed in both the compounds. Their mesomorphic behavior was studied by polarizing microscopy and differential scanning calorimetry.