Development of highly dichroic fluorescent dyes for less energy-consuming passive-type guest/host liquid crystal display systems

开发用于低能耗无源型宾/主液晶显示系统的高二色性荧光染料

• 批准号: 14350469
• 负责人: MATAKA Shuntaro
• 金额: $ 8.06万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14350469/
• 关键词: LIQUID CRYSTAL; EMISSIVEE; LESS ENERGY-CONSUMING; DICHROIC; FLUORESCENCT DYE; ROD-LIKE MOLECULAR STRUCTURE; DISPLAY; 2,1,3-BENZOTHIADIAZOLE; 蛍光2色性; 蛍光色素; ベンゾー2,1,3-チアジアゾール

Passive-type full-color liquid crystal displays(LCDs) consume a large part of the electric power, usually supplied by batteries of limited capacity, for the back light system. The development of less energy-consuming displays is required for their utilization in mobile communication tools. Within this context, fluorescent dye(guest)/LC(host) systems in such displays seem attractive. For their realization it is crucial to develop strongly fluorescent dyes with highly dichroic properties.In this study, various types of symmetric and unsymmetric 4,7-diaryl-2,1,3-benzothiadiazoles having alkoxy, alkoxymethyl, alkoxycarbonyl, ethenyl-and ethynyl groups have been prepared from 4,7-dibrpmo-2,1,3-benzothiazole. All compounds emit strong fluorescence in a solution and in solid state, covering the full color range from blue to red. Their dichroic properties have been evaluated in commercial liquid crystalline media and The dyes show practical dichroic ratios of N>8.0 and possess good solubility in commercial LC media, without destabilisation of the LC phase. With 4,7-bis(p-octyloxyphenyl)-2,1,3-benzothiadiazole as guest dye, a high dichroic ratio in fluorescence of up to 9.1 has been observed in MLC-2039 as the LC matrix.An LCD working model could be fabricated with a mixture of fluorescent dyes in MLC-2039 at a total concentration of 3%(w/w).

无源型全彩液晶显示器(LCD)消耗了背光系统的很大一部分电能，通常由容量有限的电池提供。为了在移动通信工具中使用更低能耗的显示器，需要开发更低能耗的显示器。在这种背景下，荧光染料(客体)/液晶(主体)系统在这种显示器中似乎很有吸引力。为了实现这一目标，开发具有高度二色性的强荧光染料是至关重要的。本研究以4，7-二溴-2，1，3-苯并噻唑为原料，合成了具有烷氧基、烷氧甲基、烷氧基羰基、乙烯基和乙炔基的各种对称和不对称的4，7-二芳基-2，1，3-苯并噻二唑。所有化合物在溶液和固体中都会发出强烈的荧光，覆盖了从蓝色到红色的所有颜色范围。它们的二色性已在商用液晶介质中进行了评估，实际二色性比为N&gt；8.0，在商用LC介质中具有良好的溶解性，且不会破坏LC相的稳定性。以4，7-bis(p-octyloxyphenyl)-2，1，3-benzothiadiazole为客体染料，在MLC-2039中观察到高达9.1的荧光二向色性比，在MLC-2039中以3%(w/w)的总浓度混合荧光染料可制成液晶工作模型。

项目成果

Saitoh, Akihito, Okinaka, Keiji, Suzuki, Koichi, Seno, Akihiro, Kasahara, Maki, Ueno, Kazunori, Matsumoto, Taisuke, Mataka, Shuntaro: "Site-selective formation of N-arylmethyl-imidazoles and C-arylimines in the reaction of 4,5-diamino-2,1,3-benzothiadiazo

Saitoh、Akihito、Okinaka、Keiji、Suzuki、Koichi、Seno、Akihiro、Kasahara、Maki、Ueno、Kazunori、Matsumoto、Taisuke、Mataka、Shuntaro：“反应中 N-芳基甲基-咪唑和 C-芳基亚胺的位点选择性形成

Wang, Rong, Ramaraj, Ramasamy, Okajima, Takeyoshi, Kitamura, Fusao, Matsumoto, Naoki, Thiemann, Thies, Mataka, Shuntaro, Ohsaka, Takeo: "Electrochemical behavior of conjugated quinoxaline derivatives"Journal of Electroahalytical Chemistry. 567. 85-94 (200

Wang, Rong, Ramaraj, Ramasamy, Okajima, Takeyoshi, Kitamura, Fusao, Matsumoto, Naoki, Thiemann, Thies, Mataka, Shuntaro, Ohsaka, Takeo：“共轭喹喔啉衍生物的电化学行为”Journal of Electroalytical Chemistry。

Wang, Rong, Okajima, Takeyoshi, Kitamura, Fusao, Kawauchi, Susumu, Matsumoto, Naoki, Thiemann, Thies, Mataka, Shuntaro, Ohsaka, Takeo: "Catalytic Reductions of 02 by Pyrazine Derivative"Journal of Physical Chemistry A. 108. 1891-1899 (2004)

Wang, Rong, Okajima, Takeyoshi, Kitamura, Fusao, Kawauchi, Susumu, Matsumoto, Naoki, Thiemann, Thies, Mataka, Shuntaro, Ohsaka, Takeo：“吡嗪衍生物催化还原 02”物理化学杂志 A. 108. 1891

Xuelong Zhang, Shuntaro Mataka 他: "Benzo-2,1,3-thiadiazole based, highly dichroic fluorescent dyes for fluorescent host-guest liquid crystal displays"Journal of Materials Chemistry. (印刷中). (2004)

张学龙，Shuntaro Mataka 等人：“基于苯并-2,1,3-噻二唑的高二色性荧光染料，用于荧光主客体液晶显示器”材料化学杂志（2004 年出版）。

Akira Mori, Masahiro Yokoo, Masashi Hashimoto, Seiji Ujiie, Siegmar Diele, Ute Baumeister, Carsten Tschierske: "A Novel Biaxial Smectic Liquid Crystalline Phase Formed by Rodlike Molecules with a 1,3-Diazaazulene Skeleton"Journal of the American Chemical

Akira Mori、Masahiro Yokoo、Masashi Hashimoto、Seiji Ujiie、Siegmar Diele、Ute Baumeister、Carsten Tschierske：“一种由具有 1,3-二氮杂薁骨架的棒状分子形成的新型双轴近晶液晶相”美国化学杂志