Powerful low-molecular-weight gelators based on l-valine and l-isoleucine with various terminal groups
作者:Masahiro Suzuki、Teruaki Sato、Hirofusa Shirai、Kenji Hanabusa
DOI:10.1039/b604847a
日期:——
Novel L-valine and L-isoleucine gelators, which have various terminal groups, such as an ester, carboxylic acid and carboxylate as well as different alkyl chain lengths between the terminal group and L-amino acid segment, were synthesized and their organogelation properties were examined in various organic solvents and oils. The organogelation properties significantly depended on the molecular structures of the L-amino acid, the length of the alkyl chains and hydrophilic–hydrophobic balance of the gelators. The FT-IR studies demonstrated that the driving forces for the organogel formation were the hydrogen bonding and van der Waals interactions, and the aggregation modes of the nanofibers depended on the solvents. Furthermore, it was found that these gelators were useful for the selective gelation of oils or fuels from oil/water mixtures.
合成了新型L-缬氨酸和L-异缬氨酸凝胶剂,这些凝胶剂具有不同的末端基团,如酯、羧酸和羧酸盐,以及在末端基团与L-氨基酸段之间不同的烷基链长度,并考察了它们在各种有机溶剂和油中的成胶性质。成胶性质显著依赖于L-氨基酸的分子结构、烷基链的长度以及凝胶剂的亲水-疏水平衡。FT-IR研究表明,成胶的驱动力是氢键和范德华相互作用,纳米纤维的聚集模式依赖于溶剂。此外,还发现这些凝胶剂在油/水混合物中对油或燃料的选择性成胶具有良好效果。