N,N′-disubstituted ureas:: Influence of substituents on the formation of supramolecular polymers

被引：107

作者：

Lortie, F

Boileau, S

Bouteiller, L

机构：

[1] Univ Paris 06, UMR 7610, Lab Chim Polymeres, F-75252 Paris 05, France

[2] CNRS, UMR 7581, Lab Rech Polymeres, F-94320 Thiais, France

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2003年 / 9卷 / 13期

关键词：

IR spectroscopy; polymers; self-assembly; supra-molecular chemistry;

D O I：

10.1002/chem.200304801

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Symmetrical N,N'-disubstituted ureas have been synthesized and characterized. Among them, the branched dialkylureas prepared are highly soluble in organic media. Moreover, the solutions obtained are very viscous in heptane, if the branched alkyl groups are not too bulky (i.e. a methyl group on the alpha carbon, or an ethyl group on the beta carbon). Due to the strong, bifurcated hydrogen bonds between the urea moieties, linear supramolecular polymers are formed. The degree of association of these supramolecular polymers has been determined by FTIR spectroscopy.

引用

收藏

页码：3008 / 3014

页数：7

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