Superhelix Structure in Helical Conjugated Polymers Synthesized in an Asymmetric Reaction Field
Superhelix Structure in Helical Conjugated Polymers Synthesized in an Asymmetric Reaction Field
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DOI：
10.1021/ma401092v
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发表时间：
2013-08
期刊：
影响因子：
5.5
通讯作者：
Taizo Mori;K. Akagi
中科院分区：
文献类型：
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作者：
Taizo Mori;K. Akagi
以手性液晶（N*-LC）为不对称反应场，对螺旋聚乙炔（H-PA）的超螺旋结构进行了数学描述，并将其描述为一种化学可把握的特征。H-PA的原纤和螺旋形态分别被澄清为形成圆柱形和圆锥形螺旋。作为一级结构的H-PA主链的扭转诱导了更高级螺旋结构的形成，如原纤维和螺旋形态。从H-PA的分级螺旋结构与N*-LC的关系出发，详细探讨了H-PA在N*-LC中的形成机理。超螺旋结构也被用来合理化不同的形成机制的螺旋芳香族共轭聚合物，如螺旋聚（间苯）（PMP）。结果表明，曲率和挠率是区分H-PA和PMP螺旋结构的关键。本方法基于传统的数学公式，是有用的设计…
The superhelix structure of helical polyacetylene (H-PA) synthesized in a chiral nematic liquid crystal (N*-LC) used as an asymmetric reaction field was mathematically specified and presented as a chemically graspable feature. Fibril and spiral morphologies of H-PA were clarified as forming cylindrical and conical helices, respectively. The torsion of the H-PA main chain as the primary structure induced the formation of higher-order helical structures, such as fibril and spiral morphologies. The formation mechanism of H-PA in N*-LC was investigated in detail from the relationship between the hierarchical helical structure of H-PA and N*-LC. The superhelix structure was also used to rationalize the different formation mechanisms for helical aromatic conjugated polymers, such as helical poly(m-phenylene) (PMP). It was found that the curvature and torsion are essential for distinguishing the helical structures of H-PA and PMP. The present approach, based on conventional mathematical formulas, is useful for d...