Helical twisting properties of new chiral dopants with double (S)-1,2-propanediol units for nematic liquid crystals  

作　　者：Zhang, Hai Quan Liu, Wen Ke Zhao, Li Cheng Huang, Wei Zhang, Shuai Li, Ying Yang, Huai 

机构地区：[1]Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China [2]Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Dept Mat Phys & Chem, Beijing 100083, Peoples R China

出　　处：《Chinese Chemical Letters》2010年第2期139-142,共4页中国化学快报（英文版）

基　　金：the National Science Foundation(No.20674005);the Flat-Panel Display Special Project of China 863 Plan(No.2008AA03A318);Projects of Chinese National Science and Technology Tackling Key Problems(No.2007BAE31B02)

摘　　要：A novel series of chiral dopants synthesized from(S)-1,2-propanediol and mesogenic carboxylic acids were characterized by FT-IR,~1H NMR,elemental analysis and their helical twisting properties were investigated by doping the chiral dopants into a nematic liquid crystal host(SLC-1717).The results show that,the helical pitch of N~*-LC mixture exhibited a terminal alkyl chain length dependence and the molecular twisting power β also exhibited a temperature dependence(increasing β with increasing temperature).A novel series of chiral dopants synthesized from(S)-1,2-propanediol and mesogenic carboxylic acids were characterized by FT-IR,~1H NMR,elemental analysis and their helical twisting properties were investigated by doping the chiral dopants into a nematic liquid crystal host(SLC-1717).The results show that,the helical pitch of N~*-LC mixture exhibited a terminal alkyl chain length dependence and the molecular twisting power β also exhibited a temperature dependence(increasing β with increasing temperature).

关 键 词：Chiral dopants Chiral nematic PITCH Molecular twisting power 

分 类 号：O621.2[理学—有机化学]