Liquid crystalline polymers with banana mesogens-Polarity and chirality induced by their banana shape
具有香蕉介晶的液晶聚合物-由香蕉形状引起的极性和手性
基本信息
- 批准号:15350130
- 负责人:
- 金额:$ 9.34万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B)
- 财政年份:2003
- 资助国家:日本
- 起止时间:2003 至 2004
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Liquid crystalline compounds with non-linear molecular shape, so-called banana-shaped molecules, have become a fruitful topic in liquid crystal researches since ferro-, anti-ferroelectricity and chrality were found in such achiral moleculear systems. A number of banana-shaped liquid crystalline molecules have been synthesized and studied by particularly modifying of the well-known banana-shaped molecule 1,4-phenylene [4-(4-n-alkoxypheny liminomethyl)benzoates, P-n-O-PIMB, subsequently, a variety of liquid crystalline phases and interesting properties have been revealed. In this study, we prepare a new homologous series of banana-shaped molecule containing oxadiazole core,2,5-bis(4'-n-alkylcarboxy biphenyl-4-yl)-[1,3,4]-oxadiazole (ODBBP-n) to extend the study on the polymeric banana molecules. To our knowledge, this is the first example of five-membered heterocyclic liquid crystalline molecule that exhibits banana class mesophase. In addition, the relationship between the bending geometry and mesomorphic behavior of ODBBP-n is also demonstrated by comparing with thiaziazole core derivatives. The results obtained simply described below.1)From the analysis of chiral memory between B2 and B4 phases, it was concluded that the spontaneously arising chirality is due to the chiral conformation characteristic of the banana shape.2)In ferroelectric B2 phase, the distinct layer undulation takes place as a result of the interplay between the spontaneous polarization and layer elasticity.3)In the banana molecules with the asymmetric alkyl tails, it was found that antiferroelectric phase is altered to the ferroelectric phase when two tail groups have the remarkable difference in their length.4)The extension of the study to the polymeric system failed because of the high temperature melting of polymer. Now, we try to synthesize the dimer and trimer of banana molecules.
液晶化合物具有非线性分子形状,即所谓的香蕉形分子,在这种恰当的分子系统中发现了液晶研究中的富有成果的话题。通过特别修饰众所周知的香蕉形分子1,4-苯基烯[4-(4-N-烷氧基氧甲基甲基甲基)苯甲酸酯苯甲酸酯,P-N-O-PIMB,随后,多种液体水晶性的特性和有趣的特性。在这项研究中,我们准备了一系列含有奥沙二唑核的新型同源性香蕉形分子,2,5-双(4'-N-N-烷基羧基二苯基二苯基-4-基) - [1,3,4] -oxadiazole(odbbp-n),以扩展对聚合物香蕉分子的研究。据我们所知,这是五元杂环液晶分子的第一个例子,该液晶分子表现出香蕉类中间体。此外,通过与硫唑核心核心衍生物进行比较,还证明了ODBBP-N的弯曲几何形状和介型行为之间的关系。 1)从B2和B4阶段之间的手性记忆分析中,得出的结论是,自发出现的手性能是由于香蕉形状的手性构象所引起的。2)在铁电B2相中。在B2相中,不同的层不合格,由于层次的质量和层次之间的相互作用而异,是在自发性的层次上进行了层次。烷基尾部发现,当两个尾组的长度上有显着差异时,抗氟电相变为铁电相。现在,我们尝试合成香蕉分子的二聚体和三聚体。
项目成果
期刊论文数量(40)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Study on smectic liquid crystal glass and isotropic liquid grass formed by thermotropic main-chain liquid crystal polyester
近晶液晶玻璃及热致主链液晶聚酯形成的各向同性液晶玻璃的研究
- DOI:
- 发表时间:2004
- 期刊:
- 影响因子:0
- 作者:M.Tokita;S.Funaoka;J.Watanabe
- 通讯作者:J.Watanabe
Local layer structures in circular domains of an achiral bent-core mesogen observed by X-ray microbeam diffraction
X 射线微束衍射观察到非手性弯曲核液晶元圆形域中的局部层结构
- DOI:
- 发表时间:2003
- 期刊:
- 影响因子:0
- 作者:Y.Takanishi;T.Ogasawara;K.Ishikawa;H.Takezoe;J.Watanabe;Y.Takahashi;A.Iida
- 通讯作者:A.Iida
Electric field induced transition between the polarization-modulated and ferroelectric smectic C_SP_F^* liquid crystalline stats studied using microbeam x-ray diffraction
使用微束 X 射线衍射研究偏振调制和铁电近晶 C_SP_F^* 液晶统计之间的电场诱导转变
- DOI:
- 发表时间:2004
- 期刊:
- 影响因子:0
- 作者:M.Nakata;D.R.Link;Y.Takanishi;Y.Takahashi;J.Thisayukuta;H.Niwano;D.A.Coleman;J.Watanabe;A.Iida;N.A.Clark;H.Takezoe
- 通讯作者:H.Takezoe
Solid State ^<13>C NMR Study on Chirai Twisted Conformation Attributable to Chirality in Smectic Phases of Achiral Banana-Shaped Molecules
非手性香蕉形分子近晶相手性Chirai扭曲构象的固态^ 13 C NMR研究
- DOI:
- 发表时间:2004
- 期刊:
- 影响因子:0
- 作者:H.Kurosu;M.Kawasaki;M.Hirose;M.Yamada;S.Kang;J.Thisayukta;M.Sone;H.Takezoe;J.Watanabe
- 通讯作者:J.Watanabe
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WATANABE Junji其他文献
WATANABE Junji的其他文献
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{{ truncateString('WATANABE Junji', 18)}}的其他基金
Fast-responsive filters with ionic polymer elastomer and solute permeability
具有离子聚合物弹性体和溶质渗透性的快速响应过滤器
- 批准号:
23550253 - 财政年份:2011
- 资助金额:
$ 9.34万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Quantum and classical behavior of fluctuation observed in light scattering
光散射中观察到的波动的量子和经典行为
- 批准号:
20340076 - 财政年份:2008
- 资助金额:
$ 9.34万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Clarification of nano-scaled structures in biological systems resulting in beautiful colors and their artificial production for application to optical
生物系统中纳米级结构的澄清导致美丽的颜色及其人工生产用于光学
- 批准号:
18GS0205 - 财政年份:2006
- 资助金额:
$ 9.34万 - 项目类别:
Grant-in-Aid for Creative Scientific Research
Development of ultra-precision processing technology of novel semiconductor substrate applied to devices with nano-structure
应用于纳米结构器件的新型半导体衬底超精密加工技术开发
- 批准号:
14205026 - 财政年份:2002
- 资助金额:
$ 9.34万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Preparation of soild cholesteric films from biomaterials and usage of their optical performances
生物材料固体胆甾醇薄膜的制备及其光学性能的应用
- 批准号:
11555252 - 财政年份:1999
- 资助金额:
$ 9.34万 - 项目类别:
Grant-in-Aid for Scientific Research (B).
The electron-phonon interaction in liquid investigated by near-resonantly excited Ramen scattering spectra
通过近共振激发拉曼散射光谱研究液体中的电子-声子相互作用
- 批准号:
11640315 - 财政年份:1999
- 资助金额:
$ 9.34万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Ferroeloctricity in cholesteric liquid crystals of polypeptide and its helicoidal cavity effect of SHG
多肽胆甾液晶的铁电性及其二次谐波螺旋腔效应
- 批准号:
10450361 - 财政年份:1998
- 资助金额:
$ 9.34万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Solvent-Solute Interaction in Liquid and Solid Phases of Ethanol Probed by Photon Echo Spectroscopy
用光子回波光谱法探测乙醇液相和固相中的溶剂-溶质相互作用
- 批准号:
08640405 - 财政年份:1996
- 资助金额:
$ 9.34万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Ferroelectric nematic phases formed from polar rod-like polymers
由极性棒状聚合物形成的铁电向列相
- 批准号:
08455450 - 财政年份:1996
- 资助金额:
$ 9.34万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Study on Smectic Liquid Crystalline Structure in Main-Chain Polyester
主链聚酯层列液晶结构的研究
- 批准号:
01550688 - 财政年份:1989
- 资助金额:
$ 9.34万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
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