用于氢键组装的星形光电材料的合成与表征

Syntheses and Characterization of Star-Shaped Opto-Electronic Materials for H-Bonding Induced Self-Assembly

合成了一系列具有光电活性的星状共轭分子,并在端基上引入了不同个数或不同类型的氢键基团.包括端基上分别带有1,2和3个羧酸基团的星状芴分子,以及结构更为刚性的3个端基均为2,4-二胺基三嗪环的三聚茚分子,以此形成一个系列的分子结构,便于进行系统性研究.同时我们对这些星状分子进行了紫外和荧光光谱的表征,发现星状核和长烷基侧链能有效地阻止分子间π-π堆积和增大固态薄膜的无定形态.最终这些功能性分子将有望由氢键诱导在石墨或者金属表面形成有序的自组装结构.

A series of star-shaped opto-electronic molecules end-capped with hydrogen bonding groups were synthesized. One, two and three carboxyl terminal groups were introduced into star-shaped oligofluorenes, respectively; and more planar core structure truxene with 1,3,5-triazine-2,4-diamine end-groups was also designed and synthesized for systematic research and comparison. The optical properties of these molecules were characterized by UV-Vis and fluorescence spectra, which implied that the star-shaped core and the long alkane side chains could substantially suppress the intermolecular π-π aggregation. These molecules would be good candidates for hydrogen bonding induced self-assembly materials on graphite or a metal surface.