Montarnal Damien, Tournilhac François, Hidalgo Manuel, Couturier Jean-Luc, Leibler Ludwik
Matiere Molle et Chimie, ESPCI-CNRS (UMR7167) 10 rue Vauquelin, 75005 Paris, France.
J Am Chem Soc. 2009 Jun 17;131(23):7966-7. doi: 10.1021/ja903080c.
We propose a strategy to obtain through a facile one-pot synthesis a large variety of supramolecular materials that can behave as differently as associating low-viscosity liquids, semicrystalline or amorphous thermoplastics, viscoelastic melts or rubbers. Such versatility is achieved thanks to simultaneous synthesis of branched backbones and grafting of associating units. This contrasts with usual synthetic pathways that rely on grafting functional groups on preprepared backbones. We use oligocondensation of fatty di- and triacids with diethylenetriamine and finely tune the molecular weight and degree of branching by end-capping some acid groups before condensation by reaction with aminoethylimidazolidone. Supramolecular assembly is formed thanks to complementary and self-complementary associations of amide, imidazolidone, and dialkylurea groups, and the stoichiometry directly controls the mesoscopic structure and properties.
我们提出了一种策略，通过简便的一锅法合成获得多种超分子材料，这些材料的行为可以像低粘度缔合液体、半结晶或无定形热塑性塑料、粘弹性熔体或橡胶一样不同。这种多功能性得益于支化主链的同时合成和缔合单元的接枝。这与通常依靠在预先制备的主链上接枝官能团的合成途径形成对比。我们使用脂肪酸二酸和三酸与二亚乙基三胺进行低聚缩合，并通过在缩合前与氨基乙基咪唑啉酮反应封端一些酸基团来精细调节分子量和支化度。由于酰胺、咪唑啉酮和二烷基脲基团的互补和自互补缔合形成了超分子组装，化学计量直接控制介观结构和性能。
