Photoinvertible chiral compounds are synthesized by linking a photoresponsive bisbenzothienylethene moiety with an axially chiral binaphthyl moiety and used as chiral dopants to prepare a photoinvertible chiral nematic liquid crystal (N*‐LC) field. Subsequently, electrochemical polymerizations of ethylenedioxythiophene (EDOT) in the N*‐LC field to synthesize helical poly(ethylenedioxythiophene)s (H‐PEDOTs) are achieved. The H‐PEDOTs show not only spiral morphologies resembling the fingerprinted texture of N*‐LC in polarizing optical microscope but also bisignate Cotton effects in circular dichroism spectra, indicating the formation of a helically π‐stacked structure in terms of the main chains of H‐PEDOT. In addition, the signs of the bisignate Cotton effect are strictly determined by the helicity of the N*‐LC. The present N*‐LC is the first reaction field exhibiting photoinvertible chirality with extremely high fatigue resistance and serves as an asymmetric medium for electrochemical polymerization, leading to dynamic helicity control of conjugated polymers.

中文翻译：

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Affords提供螺旋控制的芳族共轭聚合物的光可逆手性液晶

光可逆手性化合物是通过将光响应性双苯并噻吩基乙烯部分与轴向手性联萘基部分连接起来而合成的，并用作手性掺杂剂以制备光可逆手性向列液晶（N * -LC）场。随后，在N * -LC场中实现了乙二氧基噻吩（EDOT）的电化学聚合，以合成螺旋形的聚（乙二氧基噻吩）s（H-PEDOT）。H-PEDOTs不仅显示出类似于偏振光学显微镜中N * -LC指纹纹理的螺旋形态，而且在圆二色性光谱中二元化Cotton效应，表明就H主链而言形成了一个螺旋π堆积结构‐PEDOT。此外，二元棉花效应的信号严格由N * -LC的螺旋度决定。