Development of New Photo-triggered Mass Transport Systems

新型光触发大众运输系统的开发

• 批准号: 16205019
• 负责人: SEKI Takahiro
• 金额: $ 26.62万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16205019/
• 关键词: mass transport; azobenzene; block copolymers; hierarchical strucures; relief formation; molecular orientation; hydrogen bonding; 光誘因物質移動; 表面レリーフ形成; レーザー光照射; 偏光依存性; 表面レリーフ; レーザー干渉露光

Az polymers are potentially useful as materials for reversible holographic information storage and photonic devices. Surface relief gratings (SRG) formed via irradiation with an interference pattern of coherent light have been demonstrated. We have developed highly sensitive photo-activated mass migration systems using LC binary component materials comprised of an azopolymer and a liquid crystal molecule or azopolymers containing a soft segment. The energy level is three orders of magnitude smaller than those required for conventional amorphous polymer systems hitherto reported. This efficient migration is found to be due to the photoinduced phase transition of a smectic phase to an isotroipic one. In the our migrating system, the quick motion itself can be a valuable function. An application as a "molecular conveyer" for patterning of light-inert (non-photoresponsive) functional materials can be presented. Functional materials, such as dye molecules, conjugated polymers, and semiconductor quantum dots, can be conveyed by the massive motion of the Az polymers. Azobenzene unit is essential for the photo-induced mass migration, but after the relief formation the existence of this strongly light absorbing chromophore will be a severe drawback for many optical applications. To overcome these contradictory requirements, a system in which the Az unit can be detached after the relief formation is proposed. Here the Az unit is not necessarily linked to the polymer backbone, but the supramolecular liquid crystalline framework via hydrogen bonding (Kato system) is applied. After the crosslinking mentioned above, the Az unit is readily removed from the film with retention of the morphological feature of the relief structure. The present proposal can be a facile and versatile method for bleaching the SRG film.

AZ聚合物可能可作为可逆全息信息存储和光子设备的材料。已经证明了通过辐照形成的表面浮雕光栅（SRG），并具有连贯光的干扰模式。我们已经使用由偶氮聚合物和含有软段的液晶分子或偶氮聚合物组成的LC二元组件材料开发了高度敏感的光激活质量迁移系统。能量水平比迄今报道的常规无定形聚合物系统所需的能水平小三个数量级。发现这种有效的迁移是由于光诱导的相位相变为各个相位的迁移。在我们的迁移系统中，快速运动本身可以是一个有价值的功能。可以提出作为“分子输送机”的应用，以呈现光启动（非验证）功能材料的模式。功能材料，例如染料分子，共轭聚合物和半导体量子点，可以通过AZ聚合物的巨大运动来传达。偶氮苯单元对于光诱导的质量迁移至关重要，但是在浮雕形成后，这种强烈吸收的发色团的存在将是许多光学应用的严重缺点。为了克服这些矛盾的要求，在提出救济形成后，可以将AZ单位分离的系统。在这里，AZ单元不一定与聚合物主链相关，而是使用氢键（Kato System）的超分子液晶框架。上面提到的交联后，AZ单元很容易从胶片中删除，并保留了浮雕结构的形态特征。目前的提案可以是一种用于漂白SRG电影的简便而多功能的方法。

项目成果

In-situ Polymerization of Liquid Crystalline Monomers within Photo-aligned Mesoporous Silica Thin Film

光取向介孔二氧化硅薄膜内液晶单体的原位聚合

• 发表时间: 2005
• 期刊: Chem.Lett. 35(2)
• 作者: Haruhiko Fukumoto;Shusaku Nagano;Takahiro Seki
• 通讯作者: Takahiro Seki

Highly efficient photogeneration of surface relief structure and its immobilization in cross-linkable liquid crystalline azobenzene polymers

• DOI: 10.1021/ma048804c
• 发表时间: 2004-10
• 期刊: Macromolecules
• 影响因子: 5.5
• 作者: N. Zettsu;T. Seki

Assembled and Organized Films of Functional Materials and Their Applications

功能材料的组装有序薄膜及其应用

• 发表时间: 2006
• 作者: 海老原祐輔;西谷望;菊池崇;他;T. Seki
• 通讯作者: T. Seki

高分子の界面組織化と光機能

聚合物的界面组织和光学功能

• 发表时间: 2004
• 期刊: 高分子 53(7)
• 作者: Masaaki;Kojima;Kunihiro;Fujita;Yukinari;Sunatsuki;Seiichiro;Iijima;Naohide;Matsumoto;西村 貴洋;T. Okamoto;関 隆広
• 通讯作者: 関 隆広

「研究成果報告書概要(和文)」より

摘自《研究结果报告摘要（日文）》

• 发表时间: 2005
• 作者: Kawauchi;et. al.;Nishimura et al.;Dezawa et al.;Yoshizawa et al.;星野 幹雄;星野 幹雄
• 通讯作者: 星野 幹雄