Novel ferroelectric and electroclinic organosiloxane liquid crystals
Novel ferroelectric and electroclinic organosiloxane liquid crystals
复制标题
新型铁电和电动有机硅氧烷液晶
DOI：
10.1021/cm00055a019
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发表时间：
1995
影响因子：
8.6
通讯作者：
B. Ratna
中科院分区：
文献类型：
--
作者：
J. Naciri;J. Ruth;G. Crawford;R. Shashidhar;B. Ratna
具有室温手性近晶C（SmC*）或手性近晶A（SmA）相和低熔融温度的铁电液晶（FLC）材料在电光领域中具有极大的兴趣。它们是大面积平板显示器、* 1超快电光调制器2和空间光调制器等各种潜在器件的基础。3它们也被考虑用于新的非线性光学应用。4手性近晶C材料适用于需要双稳态的应用，而手性近晶A材料适用于灰度应用。通常，FLC分子由刚性核心和末端基团组成，其中手性中心位于一个或两个基团上。对于大多数FLC分子，末端-末端基团是烃链。然而，最近已经有一些努力来研究用氟碳或甲硅烷氧基单元部分取代烷基链的效果。6· 7与刚性碳氟化合物相反，烷基链的部分取代
Ferroelectric liquid crystal (FLCs) materials exhibiting room temperature chiral smectic C (SmC*) or chiral smectic A (SmA) phases and low melting temperatures are of great interest in the electrooptic field. They are the basis of a variety of potential devices ranging from large-area flat-panel displays,* 1 ultrafast electro-optic modulators, 2 and spatial light modulators. 3 They are also being considered for novel nonlinear optical ap-plications. 4 Chiral smectic C materials are appropriate for applications where bistability is required, whereas chiral smectic Amaterials are suited for gray-scale applications.Typically, FLCmolecules consist of a rigid core and end-tail groups with a chiral center located on one or both groups. For most FLC molecules, the end-tail groups are hydrocarbon chains. However, recently there has been some effort to study the effect of replacing the alkyl chains partially witheither fluoro-carbons5 or siloxy units. 6· 7 In contrast to the stiff fluorocarbons, the partial substitutionof alkyl chains