作者:Graham W. Skelton、Dewen Dong、Rachel P. Tuffin、Stephen M. Kelly
DOI:10.1039/b209045g
日期:2003.2.20
The first liquid crystals incorporating a non-conjugated carbon–carbon triple bond in the terminal chain to exhibit a nematic phase above the melting point are reported. A variety of compounds incorporating a carbon–carbon triple bond in the terminal chain or between two phenyl rings have been synthesised as part of an investigation of the effects of the shape, conformation and rigidity of the terminal chains of liquid crystals on their mesophase behaviour. A series of related tolanes incorporating an alkenyloxy chain with an additional carbon–carbon double bond or a simple alkoxy chain as a terminal substituent also were prepared for comparison purposes.
据报道,首次发现了在末端链中包含非共轭碳-碳三键并在熔点以上呈现向列相的液晶。为了研究液晶末端链的形状、构象和刚性对其介晶相行为的影响,合成了一系列在末端链中或两个苯环之间包含碳-碳三键的化合物。此外,还制备了一系列相关的托兰化合物,其在末端取代基为含额外碳-碳双键的烯氧链或简单的烷氧链,用于比较研究。