Novel polythiophenes which exhibit strong main chain absorption in the ultraviolet to visible region, show optical activity depending on the polymeric chain alone, and comprise as repeating units thiophene rings containing chiral substituent groups, and are represented by the following general formula:
1
(wherein R
1
and R
2
are the same or different, each representing a hydrogen atom or an organic group, of which at least one is an enantiopure alkyl group with a branch structure at the &bgr;-position, and n represents the number of repeating units selected from 10 to 100,000).
                            新型聚
噻吩在紫外至可见光区域表现出强烈的主链吸收,其光学活性仅取决于聚合链,并由含有手性取代基的
噻吩环作为重复单元组成,其通式如下:
1
(其中 R
1
和 R
2
相同或不同,各自代表一个氢原子或一个有机基团,其中至少有一个是在 &bgr;- 位具有分支结构的对映体纯烷基,n 代表从 10 到 100,000 中选择的重复单元数)。