We electrochemically polymerized various achiral heteroaromatic monomers in left-handed helical cholesteric liquid crystal (CLC) media. Circular dichroism (CD) spectroscopy revealed that most of the resulting conjugated polymer films exhibited both the first negative and second positive Cotton effects near their absorption maxima. This indicates left-handed helical aggregation of the conjugated main
我们在左旋螺旋胆甾型液晶(CLC)介质中电
化学聚合了各种非手性杂芳族单体。圆二色性(CD)光谱显示,大多数所得共轭聚合物薄膜在其吸收最大值附近均表现出第一负棉花效应和第二正棉花效应。这表明共轭主链的左旋螺旋聚集,这与CLC的左旋螺旋顺序一致。该结果表明,在电沉积期间,左旋螺旋CLC环境引起聚合物的左旋螺旋聚集。然而,聚合物的CD强度取决于母体单体的结构。