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Development of Next-generation Functional Materials Based on Isolated Macromolecules

基于孤立大分子的下一代功能材料的开发

基本信息

批准号：
15350128
负责人：
AIDA Takuzo
金额：
$ 9.92万
依托单位：
The University of Tokyo
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：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15350128/
关键词：
mesoporous silica polymerization conductive polymer 反応場孤立化配向制御

项目摘要

Novel meso-structured silica gel was successfully obtained via sol-gel process using an amphiphile, containing thiophene and oligoethylene groups at its terminal positions, as a template. Oxidation of the composite with FeCl_3 caused polymerization of the thiophene within the silica channels, where fluorescence due to the formed polythiophenes observed, after removal of the oxidant by washing. Peak top of the fluorescence was bathochromically shifted from that observed for polythiophene obtained from the amphiphile alone, indicatging the possible elongation of the effective conjugation length in the silica channels. Although the silica channels in single domain are aligned in the same direction, it is well known that orientation of silica channels is macroscopically disordered because of the randomization of domains. For micrometer-range alignment of silica channels, sol-gel reaction at the lithographically patterned groove on the silicon substrate has been recently proposed and demonstrated to be useful. Collaboration with the group possessing this technique resulted in the successful alignment of polythiphenes. TEM observations of cross-sections parallel and perpendicular to the long axis of the groove clearly demonstrated that silica channels were aligned along with the long axis of the groove. Furthermore, polythiphenes in the channels were also aligned, as confirmed by anisotropic emission of the fluorescence.

以一种末端含有噻吩和低聚乙烯基的两亲分子为模板剂，通过溶胶-凝胶法合成了一种新型的介孔结构硅胶。用FeCl_3氧化该复合物导致噻吩在二氧化硅通道内聚合，在通过洗涤除去氧化剂后，观察到由于形成的聚噻吩而产生的荧光。荧光的峰顶从单独从两亲物获得的聚噻吩观察到的峰顶向红移，表明二氧化硅通道中有效共轭长度的可能延长。尽管单畴中的二氧化硅通道沿相同方向排列，但众所周知，由于畴的随机化，二氧化硅通道的取向在宏观上是无序的。对于微米范围内的硅通道的对准，溶胶-凝胶反应在硅衬底上的光刻图案化的凹槽最近已被提出，并证明是有用的。与拥有这种技术的小组合作，成功地对聚噻吩进行了排列。平行和垂直于槽长轴的横截面的TEM观察清楚地表明二氧化硅通道沿着与槽长轴对齐。此外，通道中的聚噻吩也被对齐，如通过荧光的各向异性发射所证实的。