Phenanthroline Dicarboxamide-Based Helical Foldamers: Stable Helical Structures in Methanol
作者:Zhi-Qiang Hu、Hai-Yu Hu、Chuan-Feng Chen
DOI:10.1021/jo052222r
日期:2006.2.1
fold into well-defined helical structures in solution through intramolecular hydrogen bonds and aromatic stacking interactions, which has been established by 1H NMR, fluorescence, and UV/vis spectra. In particular, it was found that the oligomers were more favorable to fold into stable helical structures in methanol than in chloroform and dichloromethane. The helical foldamers formed in the solid state
一系列新的芳族低聚酰胺2 - 5基于1,10-菲咯啉二酸和ö苯二胺必须通过一个会聚段耦合策略被合成。这些低聚物可以通过分子内的氢键和芳族堆积相互作用折叠成溶液中明确定义的螺旋结构,这一点已由11 H NMR,荧光和UV / vis光谱。特别地,发现与在氯仿和二氯甲烷中相比,低聚物在甲醇中更有利于折叠成稳定的螺旋结构。固态形成的螺旋形折叠剂已经通过单晶X射线衍射分析进行了表征。结果表明,钢绞线的高曲率导致2和21都绕了半圈,4绕了三圈,而5绕了近四圈。