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1. 北京大学 工学院 北京,100871
2. 北京科技大学 化学与生物工程学院 化学系 北京,100083
收稿日期:2012-11-14,
修回日期:2012-12-17,
纸质出版日期:2013-04-15
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原小涛, 弓爱君, 杨槐. 手征性向列相液晶复合体系的研究[J]. 液晶与显示, 2013,28(2): 155-161
YUAN Xiao-tao, GONG Ai-jun, YANG Huai. Helical Twisting Behavior of Chiral Nematic Mesophase[J]. , 2013,28(2): 155-161
原小涛, 弓爱君, 杨槐. 手征性向列相液晶复合体系的研究[J]. 液晶与显示, 2013,28(2): 155-161 DOI: 10.3788/YJYXS20132802.0155.
YUAN Xiao-tao, GONG Ai-jun, YANG Huai. Helical Twisting Behavior of Chiral Nematic Mesophase[J]. , 2013,28(2): 155-161 DOI: 10.3788/YJYXS20132802.0155.
以(+)-2-甲基丁醇为不对称中心制备了单手性中心与双手性中心两个系列的液晶用手性掺杂物
分别将其与4-烷基联苯氰类向列相液晶混合。通过对单手性中心掺杂物/向列相液晶复合体系的研究
发现了手性中心的旋转自由度对其螺旋扭曲力的影响规律;进一步制备了双手性中心掺杂物
并对双手性中心掺杂物/向列相液晶复合体系的螺旋扭曲力及其螺距的温度依赖性进行研究
发现两个手性中心之间的链接方式对其螺旋扭曲力的温度依赖性有强烈的影响。
Chiral dopants based on optically active (+)-2-methylbutan-1-ol were prepared. Two kinds of induced chiral nematic liquid crystal (N
*
-LC) were achieved by mixing the chiral dopants in 4-n-alkyl-4'-cyanobiphenyl (CBS) host nematic liquid crystal. The helical pitches of the N
*
-LC were measured and the regularities of change were analyzed. The results showed that the steric hindrance in the chiral region contributed to the helical twisting power (
) of the N
*
phase. The substitution between the two chiral center had a strongly effect on
and the temperature dependence of the helical pitch (d
p
/d
t
).
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