An unprecedented memory of macromolecular helicity induced in an achiral polyisocyanide in water.
An unprecedented memory of macromolecular helicity induced in an achiral polyisocyanide in water.
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DOI：
10.1021/ja039279k
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发表时间：
2004-01
影响因子：
15
通讯作者：
M. Ishikawa;Katsuhiro Maeda;Yuuki Mitsutsuji;E. Yashima
中科院分区：
文献类型：
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作者：
M. Ishikawa;Katsuhiro Maeda;Yuuki Mitsutsuji;E. Yashima
我们发现了一个前所未有的记忆大分子螺旋诱导的非手性钠盐的聚（4-羧基苯基异腈）（聚-1-Na）。聚-1-钠折叠成一个单手螺旋通过周围的C=N骨架的构型异构化通过与光学活性胺在水中的相互作用。当旋光胺被完全除去时，螺旋仍然存在，并且侧基进一步修饰为羧基和酯是可能的，而不会损失大分子螺旋度记忆。
We have found an unprecedented memory of macromolecular helicity induced in an achiral sodium salt of poly(4-carboxyphenyl isocyanide) (poly-1-Na). Poly-1-Na folds into a one-handed helix through configurational isomerization around the C=N backbones by interactions with optically active amines in water. The helix remains when the optically active amines are completely removed, and further modifications of the side group to carboxy and esters can be possible without loss of the macromolecular helicity memory.