Novel smectic liquid crystals based on benzocinline:Their synthesis, mesomorphism, opto- and elctro-chemical proerties
Novel smectic liquid crystals based on benzocinline:Their synthesis, mesomorphism, opto- and elctro-chemical proerties
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基于苯佐辛啉的新型近晶液晶：其合成、介晶性、光电化学性质
DOI：
10.1080/02678292.2016.1229056
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发表时间：
2016
期刊：
影响因子：
2.2
通讯作者：
and J. Hanna
中科院分区：
文献类型：
--
作者：
T-Z. Yang;H. Iino;and J. Hanna
通过一种简便的方法合成了一系列基于极性苯并[c]噌啉结构的新型液晶。通过单烷基化和二烷基化的分子设计诱导了丰富的近晶相，包括矩形和六方有序的高度有序的近晶相。二烷基化的苯并喹啉衍生物在150°C以上表现出很宽的近晶C（SmC）相的温度范围，而单烷基化的苯并喹啉衍生物只表现出较低的有序中间相，在晶相中表现出双层结构。从循环伏安图中明显的可逆氧化还原波和约-3.2 eV的最低未占分子轨道能级表明可能的电子传输行为。此外，在SmC* 的铁电性引起的手性掺杂剂的开关行为进行了观察。
A series of novel calamatic liquid crystals based on a polar benzo[c]cinnoline moiety were efficiently prepared through a facile route. Rich smectic mesophases were induced by the monoalkylated and dialkylated molecular design, including highly ordered smectic mesophases in the rectangular and hexagonal orders. Dialkylated phenylbenzocinnoline derivatives showed a very wide temperature range over 150°C for smectic C (SmC) phase, while the monoalkylated ones only presented the low-ordered mesophases, which exhibited a bilayer structure in crystalline phase. From pronounced reversible redox waves in a cyclic voltammogram and low-lying lowest unoccupied molecular orbital level of about −3.2 eV indicated possible electron-transporting behaviour. In addition, a switching behaviour originating from ferroelectricity in SmC* induced by chiral dopant was observed.