Self-assembly of folded m-phenylene ethynylene oligomers into helical columns
Self-assembly of folded m-phenylene ethynylene oligomers into helical columns
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DOI：
10.1021/ja010751g
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发表时间：
2001-08-22
影响因子：
15
通讯作者：
Moore, JS
中科院分区：
文献类型：
--
作者：
Brunsveld, L;Meijer, EW;Moore, JS
用圆二色性光谱研究了两个系列的间苯乙炔齐聚物在强极性溶剂中的自组装行为。发现较短的低聚物长度的螺旋构象在乙腈水溶液中稳定，而较长的低聚物开始分子间相互作用。低聚物在水溶液中的分子间聚集揭示了一个链长依赖的关联，需要存在一个稳定的螺旋构象。军士和士兵实验提供了分子间相互作用的证据，其中手性寡聚体的扭曲感偏转移到非手性寡聚体。
Circular dichroism spectroscopy has been used to study the self-assembly of two series of m-phenyleric ethynylene oligomers in highly polar solvents. The helical conformation of shorter oligomer lengths was found to be stabilized in aqueous acetonitrile solutions, while longer oligomers began to interact intermolecularly. The intermolecular aggregation of the oligomers in aqueous solutions revealed a chain length dependent association that required the presence of a stable helical conformation. Evidence for intermolecular interaction, is provided by Sergeants and Soldiers experiments in which the twist sense bias of a chiral oligomer is transferred to an achiral oligomer.