In situ organogelation at room temperature: direct synthesis of gelators in organic solvents
作者:Masahiro Suzuki、Yasushi Nakajima、Mariko Yumoto、Mutsumi Kimura、Hirofusa Shirai、Kenji Hanabusa
DOI:10.1039/b401683a
日期:——
Organogels are formed through a conventional organogelation involving a heating process and an in situ organogelation at room temperature. The conventional organogelation is carried out by dissolution of gelators by heating, while the in situ organogelation is performed by mixing of highly reactive methyl 2,6-diisocyanatohexanoate (LDI) or 2-isocyanatoethyl 2,6-diisocyanatohexanoate (LTI) and alkylamines. The in situ organogelation produced the organogels within several seconds after mixing. The organogels prepared by the in situ organogelation showed quite similar FT-IR spectra and SEM photographs to those formed by conventional organogelation. Moreover, the in situ organogelation using LTI and octylamine as well as dodecylamine produced organogels of acetone, ethyl acetate, and acetonitrile that gelators 5 and 6 cannot gel through conventional organogelation.
有机凝胶是通过传统的有机凝胶化和在室温下的原位有机凝胶化过程形成的。传统的有机凝胶化是通过加热溶解凝胶剂进行的,而原位有机凝胶化是通过将高度反应性的甲基 2,6-二异氰酸酯己酸酯(LDI)或 2-异氰基乙基 2,6-二异氰酸酯己酸酯(LTI)与烷基胺混合进行的。原位有机凝胶化在混合后几秒钟内就产生了有机凝胶。通过原位有机凝胶化制备的有机凝胶在傅里叶变换红外光谱(FT-IR)和扫描电子显微镜(SEM)照片上与通过传统有机凝胶化形成的有机凝胶表现出相似性。此外,使用 LTI 及辛胺和十二胺进行的原位有机凝胶化也产生了丙酮、乙酸乙酯和乙腈的有机凝胶,而凝胶剂 5 和 6 通过传统有机凝胶化无法形成凝胶。