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.

我们使用1,7-二羟基苯乙烯和Aklylthio末端链基合成了新型弯曲核液晶材料。观察到一个新的SMAP相，即通过延伸到具有1,7-萘核的七个环的七环中极化与层平行的，这清楚地表明了应用于面内切换模式的可能性。此外，在将1,7-萘甲烯与烷基硫硫代末端组结合的系统中，检测到了一种新型可切换柱相。由于分子设计的弯曲角结构较小，因此通过高层曲率理解了新型柱状相的形成，除了期望应用LC显示外，它还提供了进一步的科学利益。

项目成果

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
• 期刊: Jpn.J.Appl.Phys. 49
• 作者: Seng Kue Lee;Sungmin Kang;Masatoshi Tokita;Junji Watanabe
• 通讯作者: Junji Watanabe

Formation of a homochiral antiferroelectric ground state in asymmetric bent-shaped molecules

不对称弯曲分子中同手性反铁电基态的形成

• 发表时间: 2010
• 期刊: Liq.Cryst. 37
• 作者: Seng Kue Lee;Sungmin Kang;Masatoshi Tokita;Junji Watanabe
• 通讯作者: Junji Watanabe

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

在具有烷硫基尾部的弯曲形状分子的 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

• 发表时间: 2010
• 期刊: J.Mater.Chem. 20
• 作者: Seng Kue Lee;Xiaodong Li;Sungmin Kang;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
• 期刊: Chem.Lett. 38
• 作者: Xiaodong Li;Seng Kue Lee;Sungmin Kang;Masatoshi Tokita;Susumu Kawauchi;Junji Watanabe
• 通讯作者: Junji Watanabe

Syntehsis of Liquid Crystal Molecules Based on bis(byphenyl)diacetylene and Their Liquid Crystallinity

双(联苯基)联乙炔液晶分子的合成及其液晶性

• 发表时间: 2010
• 期刊: Chem.Lett. 39
• 作者: Makoto Uchimura;Sungmin Kang;Ryohei Ishige;Gen-ichi Konishi;Junji Watanabe
• 通讯作者: Junji Watanabe