Ferroelectricity and its application to LCD of Bent-shaped molecules of small bending angle

小弯曲角弯曲分子的铁电性及其在液晶显示器中的应用

• 批准号: 21750138
• 负责人: KANG Sungmin
• 金额: $ 3万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21750138/
• 关键词: キラリティ; バナナ型分子; 強誘電性; バナナ型液晶; スメクチック相; ディスプレイ

We have synthesized novel bent-core liquid crystal materials by using 1,7-dihydroxynaphthalene and aklylthio terminal chain groups. A novel SmAP phase was observed where the polarization is lying parallel to the layer by extention to seven rings mesogen with 1,7-naphthalene core, which clearly showed a possibility to the application to in-plane switching mode. Furthermore, in the system which 1,7-naphthalene is combined with alkylthio terminal group, a novel switchable columnar phase was detected. The formation of novel columnar phase was understood by a high layer curvature due to the small bent angle structure of molecular design, which provides further scientific interests it self in addition to the anticipation to application of LC display.

我们利用1,7-二羟基萘和烷硫基端链基团合成了新型弯核液晶材料。通过扩展到具有 1,7-萘核的七环介晶，观察到一种新颖的 SmAP 相，其中偏振平行于层，这清楚地表明了应用于面内开关模式的可能性。此外，在1,7-萘与烷硫基端基结合的体系中，检测到了一种新型的可转换柱状相。由于分子设计的小弯角结构，新型柱状相的形成被理解为高层曲率，这除了对液晶显示应用的预期之外，还提供了进一步的科学兴趣。

项目成果

Formation of banana phases in bent-shaped molecules with unusual bent angles as low as 60°

在弯曲形状的分子中形成香蕉相，弯曲角度低至 60°

• 发表时间: 2009
• 作者: Seng Kue Lee; Xiaodong Li; Sungmin Kang; Masatoshi Tokita; Junji Watanabe
• 通讯作者: Junji Watanabe

Antiferroelectric switching between optically isotropic and birefringent B2 phases of bent-shaped molecules with high tilt angle of 45°

具有 45° 高倾斜角的弯曲分子的光学各向同性和双折射 B2 相之间的反铁电转换

• 发表时间: 2010
• 作者: Seng Kue Lee; Sungmin Kang; Masatoshi Tokita; Junji Watanabe
• 通讯作者: Junji Watanabe

Unusual formation of switchable hexagonal columnar phase by bent-shaped molecules with lowbent-angle naphthalene central core and alkylthio tail

具有低弯角萘中心核和烷硫基尾的弯曲形状分子异常形成可转换的六方柱状相

• 发表时间: 2010
• 作者: Xiaodong Li; Sungmin Kang; Seng Kue Lee; Masatoshi Tokita; Junji Watanabe
• 通讯作者: Junji Watanabe

Effect of alkylthio tail on phase behaviors of bent-shaped molecules beased on naphthalene core

烷硫基尾部对萘核弯曲分子相行为的影响

• 发表时间: 2009
• 作者: Xiaodong Li; Seng Kue Lee; Sungmin Kang; Masatoshi Tokita; Susumu Kawauchi; Junji Watanabe
• 通讯作者: Junji Watanabe

Electric-field-induced transition between ferro- and antiferroelectric ground states observed in the B7 phase of a bent-shaped molecule with alkylthio tails

在带有烷硫基尾部的弯曲分子的 B7 相中观察到电场诱导的铁电基态和反铁电基态之间的转变

• DOI: 10.1039/b927280a
• 发表时间: 2010-04-27
• 期刊: Journal of Materials Chemistry
• 作者: Seng;Xiaodong Li;Sungmin Kang;M. Tokita;J. Watanabe
• 通讯作者: J. Watanabe