Non-symmetric chiral liquid crystal dimers. Preparation and characterisation of the (S)-(benzylidene-4′-substitutedaniline)-2″-methylbutyl-4‴-(4″″-phenyloxy)-benzoateoxy)hexanoates
作者:Guan-Yeow Yeap、Faridah Osman、Corrie T. Imrie
DOI:10.1016/j.molstruc.2016.01.007
日期:2016.5
described. The terminal substituents on the 4-benzylidene-4′-substituted fragment are H, Cl, Br, I, CH 3 and C 2 H 5 . All six dimers exhibit an enantiotropic chiral nematic phase. The relationship between the chiral nematic-isotropic transition temperature and the terminal substituent is discussed in terms of the size of the substituent and its effect of the molecular shape, and its ability to interact
摘要 描述了属于 ( S )-(benzylidene-4'-locatedaniline)-2"-methylbutyl-4‴-(4""-phenyloxy)benzoate-oxy)己酸酯家族的六种手性非对称二聚体的性质。 . 4-亚苄基-4'-取代片段上的末端取代基是H、Cl、Br、I、CH 3 和C 2 H 5 。所有六个二聚体都表现出对映手性向列相。手性向列-各向同性转变温度与末端取代基之间的关系根据取代基的大小及其对分子形状的影响,以及与它所连接的介晶基团相互作用的能力进行了讨论。C 2 H 5 取代的二聚体还显示出对映单层手性近晶C相,其形成归因于更长的烷基链引起的增强的分子不均匀性。