权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

SYNTHESIS OF NEW,HIGH-EFFICIENCY LIQUID CRYSTAL COMPOUNDS OF BETA-CYCLOHEXYL-ALFA,BETA-DIFLUOROSTYRENE CORE STRUCTURE

β-环己基-α、β-二氟苯乙烯核心结构新型高效液晶化合物的合成

基本信息

批准号：
07555582
负责人：
INOUE Seiichi
金额：
$ 1.09万
依托单位：
YOKOHAMA NATIONAL UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

项目摘要

Molecular design and synthesis of new, highly efficient liquid crystal compounds having beta-cyclohexyl-alfa, beta-difluorostyrene core structure have been investigated in view of practical application from 1995 through 1997.1. As to synthesis of the basic core compound, methods for generation of cyclohexyllithium and its reaction with tetrafluoroethylene were investigated and effective method was established using 4-alkylcyclohexanol as a atarting compund.2. As to molecular design of liquid crystal of beta-cyclohexyl-alfa, beta-difluorostyrene core structure, it turned out difficult to design effective cyano compounds because of different temperature ranges of liquid crystal phase for individual compounds.3. As to molecular design and synthesis of chiral additives for STN-LC devices, it proved to be difficult to predict molecular structure of effective compounds because of weak relationship between molecular structute and effectiveness as chiral additive. So long as a series of benzoa … More tes were synthesized and their physical properties were evaluated, an approximately linear relationship was observed between helical pitch and length of side chain, whereas viscosity changed up and down depending on the even or odd number of side chain atoms.4. As to synthesis and purification on a large scale, there will be need of further investigation for chlorination at low temperature and reactions with alkylmetal compounds. Purification method must be reinvestigated for some steps of the synthesis.5. Sone effective compounds were found for suitable practical application as the result of evaluation of newly synthesized compounds.Throughout this research project new and significant information was obtained regarding the physical properties and molecular structures of liquid crystal compounds. But systematic synthesis and evaluation of compounds having various functional groups will be required in order to clarify the structure-propertis relationship and to enable the molecular design. Less

从1995年到1997.1年间，从实际应用的角度出发，研究了具有β-环己基-α，β-二氟苯乙烯核结构的新型高效液晶化合物的分子设计和合成。在碱性核心化合物的合成方面，研究了环己基锂的生成方法及其与四氟乙烯的反应，建立了以4-烷基环己醇为基团的有效合成方法。对于β-环己基-α，β-二氟苯乙烯核心型液晶的分子设计，由于各个化合物的液晶相温度范围不同，很难设计出有效的氰基化合物。在用于STN-LC器件的手性添加剂的分子设计和合成中，由于分子结构与作为手性添加剂的有效性之间的弱相关性，因此很难预测有效化合物的分子结构。只要一系列安息香…合成了更多的TES，并对其物理性能进行了评价，发现螺距与侧链长度呈近似线性关系，而粘度则随侧链原子的偶数或奇数而变化。至于大规模的合成和提纯，还需要进一步研究低温氯化反应和与烷基金属化合物的反应。对于合成的某些步骤，必须重新研究提纯方法。通过对新合成化合物的评价，发现了一些适合实际应用的有效化合物。通过这一研究项目，获得了关于液晶化合物的物理性质和分子结构的新的有意义的信息。但是，需要系统地合成和评价具有各种官能团的化合物，以澄清结构-性质的关系，并使分子设计成为可能。较少