Nematogenic and smectogenic liquid crystals from new heterocyclic isoflavone derivatives:Synthesis,characterization and X-ray diffraction studies  

作　　者：Wan Sinn Yam Guan Yeow Yeap 

机构地区：[1]Liquid Crystal Research Laboratory,School of Chemical Sciences,Universiti Sains Malaysia,Minden 11800,Malaysia

出　　处：《Chinese Chemical Letters》2011年第2期229-232,共4页中国化学快报（英文版）

基　　金：Universiti Sains Malaysia for USM RU(No.1001/PKIMIA/81140)

摘　　要：A new series of liquid crystals comprising eight heterocyclic isoflavone esters,7-alkanoyloxy-3-[4＇-（3-methylbutyloxyphenyl）]- 4H-1-benzopyran-4-ones exhibiting enantiotropic nematic（N） and smectic C（SmC） phases were synthesized and investigated.The mesomorphic properties of all derivatives were investigated by means of differential calorimetry and polarized optical microscopy. Wide angle X-ray diffraction technique was employed to investigate the molecular packing associated with the intermolecular interaction as well as the correlation between the thermal behaviour of these compounds with their anisotropy properties within a mesophase.A new series of liquid crystals comprising eight heterocyclic isoflavone esters,7-alkanoyloxy-3-[4＇-（3-methylbutyloxyphenyl）]- 4H-1-benzopyran-4-ones exhibiting enantiotropic nematic（N） and smectic C（SmC） phases were synthesized and investigated.The mesomorphic properties of all derivatives were investigated by means of differential calorimetry and polarized optical microscopy. Wide angle X-ray diffraction technique was employed to investigate the molecular packing associated with the intermolecular interaction as well as the correlation between the thermal behaviour of these compounds with their anisotropy properties within a mesophase.

关 键 词：HETEROCYCLIC ISOFLAVONE ENANTIOTROPIC MESOPHASE 

分 类 号：O621.2[理学—有机化学]