Creation of aromatic-type optically active conducting polymers by using liquid crystalline reaction field.

利用手性向列相液晶构筑了液晶反应场。并在该反应领域内聚合了无手性的噻吩类单体。这样得到的聚合物表现出手性聚集行为，尽管聚合物中没有手性取代基，但聚合物仍具有光学活性。通过这一结果，该聚合技术可以归结为一种新的不对称聚合方法，我们发展了“液晶不对称聚合方法”。在手性向列相液晶领域中，通过电化学聚合成功地制备了光学活性的聚联苯。聚合物的偏光和相衬光学显微照片显示了与手性向列相的光学织构相似的分辨率很好的螺旋形态。圆二向色性测试表明薄膜具有Cotton效应。该聚合物表现出光学活性的电致变色和开关行为，复制了作为电化学聚合溶剂的手性向列相液晶的螺旋形态，提供了具有光学活性电致变色的光学活性共轭聚合物。所提出的合成方法为手性工程提供了新的可能性，允许合成一系列具有手性性质的共轭聚合物，并扩大了此类聚合物在生物科学和工程中的应用。这项研究还强调了手性反应领域在化学合成中的重要性和多功能性。

We constructed liquid crystalline reaction field by using chiral nematic liquid crystals. And achiral thiophene monomer was polymerized in this reaction field. The polymer thus obtained showed chiral aggregation behavior, and the polymer exhibited optically active properties in spite of the polymer having no chiral substituent. Through this result, this polymerization technique can be concluded as new asymmetric polymerization method, and we developed "liquid crystal asymmetric polymerization method".Optically active polybithiophene was successfully prepared by electrochemical polymerization in a chiral nematic liquid crystal field. Polarizing and phase-contrast optical micrographs of the polymer revealed a well-resolved spiral morphology similar to the optical texture of the chiral nematic phase. Circular dichroism measurements indicated the Cotton effect for the film. The polymer exhibited optically active electrochromism and switching behavior.The polymer was demonstrated to replicate the spiral morphology of chiral nematic liquid crystal used as a solvent in electrochemical polymerization, affording an optically active conjugated polymer exhibiting optically active electrochromism. The proposed synthesis method provides new possibilities for chiral engineering, allowing for the synthesis of a range of conjugated polymers with chiroptical properties and extending the applications of such polymers in bioscience and engineering. This study also highlights the importance and versatility of chiral reaction fields for chemical synthesis.