超分子纳米圆柱体的动态桥接引发各向同性流体向向列相凝胶的转变。

Transformation of isotropic fluid to nematic gel triggered by dynamic bridging of supramolecular nanocylinders.

作者信息

Ryu Ja-Hyoung, Lee Myongsoo

机构信息

Center for Supramolecular Nano-Assembly and Department of Chemistry, Yonsei University, Seoul 120-749, Korea.

出版信息

J Am Chem Soc. 2005 Oct 19;127(41):14170-1. doi: 10.1021/ja055583x.

DOI:10.1021/ja055583x

PMID:16218596

Abstract

We have synthesized an amphiphilic triblock coil-rod-coil molecule consisting of a rigid aromatic building block and poly(ethylene oxide). The coil-rod-coil molecule was observed to assemble into a cylindrical micelle structure in aqueous solution. Notably, addition of a small amount of a rod-coil-rod molecule into the cylindrical micellar solution can induce the anisotropic gelation due to dynamic interconnection of adjacent cylindrical micelles via hydrophobic and pi-pi interactions. Depending on the concentration of the rod-coil-rod molecule, the nematic gel can be reversibly switched into an isotropic solution of cylindrical micelles.

摘要

我们合成了一种由刚性芳香族结构单元和聚环氧乙烷组成的两亲性三嵌段线圈-棒-线圈分子。观察到该线圈-棒-线圈分子在水溶液中组装成圆柱形胶束结构。值得注意的是，向圆柱形胶束溶液中加入少量棒-线圈-棒分子会由于相邻圆柱形胶束通过疏水作用和π-π相互作用的动态互连而诱导各向异性凝胶化。根据棒-线圈-棒分子的浓度，向列型凝胶可以可逆地转变为圆柱形胶束的各向同性溶液。