A precise tuning of the four possible states of a helix (P/M helical sense and stretched/compressed helical backbone) is attained by controlling the complexation between Li⁺ and a poly(phenylacetylene) that bears amide, ester and phenyl ring functionalities at the pendant group. Depending on the MeOH ratio that is present as a cosolvent, different coordination sites are involved in interactions leading to complexes I–III, each one with a characteristic structure (tri-, bi-, and unipodal) and an associated helical state. This dynamic coordination allows the selective modification of the helical sense or the stretching/compression backbone of a helical polymer.

中文翻译：

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涉及阳离子-π相互作用以控制螺旋聚合物结构的多足动力学配位

通过控制Li ⁺与聚（苯基乙炔）之间在酰胺基，酯基和苯环上具有官能团的络合物之间的络合，可以精确调节螺旋的四个可能状态（P / M螺旋方向和拉伸/压缩的螺旋主链）。吊坠组。取决于作为助溶剂的MeOH比例，相互作用中会涉及不同的配位点，从而形成配合物I-III，每个配合物均具有特征结构（三，双和单足）和相关的螺旋态。这种动态配位允许选择性地修饰螺旋形聚合物或螺旋形聚合物的拉伸/压缩骨架。