蜜胺修饰的偶氮类凝胶因子的合成及其凝胶行为

设计合成了2个双蜜胺修饰的偶氮苯类小分子有机凝胶因子M-AZO-1和M-AZO-2.M-AZO-1和M-AZO-2能在多种有机溶剂中形成稳定的凝胶.通过SEM观察凝胶聚集体结构发现，凝胶因子在不同溶剂中形成凝胶的微观形貌结构不同，在乙酸乙酯等极性溶剂中凝胶纤维直径较大，在甲苯和甲基环己烷等非极性溶剂中凝胶纤维直径较小.进一步研究了UV光照对凝胶行为的影响.M-AZO-1和M-AZO-2经365 nm UV光照后仍可以形成凝胶，其凝胶聚集体结构变化不明显.
Two azobenzene gelators (M-AZO-1 and M-AZO-2) with melamine moieties were designed and synthesized. The two gelators can gel many kinds of organic solvents with a low concentration. The SEM images of the xerogels showed fibers with larger diameter formed in polar organic solvents such as ethyl acetate, and fibers with smaller diameters formed in apolar organic solvents such as toluene and methyl cyclohexane. The effect of UV irradiation on gelation behavior was further investigated. After the irradiation of 365nm light, M-AZO-1 and M-AZO-2 could still gel the same solvents and the morphologies of aggregations remained unchanged obviously.