Supramolecular Gels Formed by Amphiphilic Low-Molecular-Weight Gelators ofNα,Nɛ-Diacyl-L-Lysine Derivatives
作者:M. Suzuki、M. Yumoto、H. Shirai、K. Hanabusa
DOI:10.1002/chem.200701111
日期:2008.2.27
result of a change in nanostructure from micelle-like aggregates to nanofibers, which was induced by partial protonation of the carboxylate to form a carboxylic acid. On the other hand, two-component low-molecular-weight gelators exhibited amphiphilic gelation behavior and functioned as not only hydrogelators, but also as organogelators. FTIR studies revealed that lateral ionic interactions between the
简单的L-赖氨酸衍生物,N(α)-己酰基-N(ε)-月桂酰-L-赖氨酸(1),其碱金属盐(2-4)和由1与2到4组成的二组分化合物合成了它们,并研究了它们的水凝胶化和有机凝胶化性能。在室温下将盐酸添加到碱金属盐的水溶液中产生了半透明的水凝胶。这种水凝胶化是由于纳米结构从胶束状聚集体变为纳米纤维而发生的,这种变化是由羧酸盐的部分质子化形成羧酸而引起的。另一方面,两组分低分子量胶凝剂表现出两亲性胶凝行为并且不仅起水凝剂的作用,而且还起有机胶凝剂的作用。FTIR研究表明,羧酸盐,碱金属阳离子,除了氢键和范德华力相互作用外,羧酸和质子在水凝胶化中也起着非常重要的作用。此外,发现在两组分胶凝剂体系中,水不溶性羧酸化合物经历了具有热可逆的溶胶-凝胶转变的沉淀-溶解转变。