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设计合成了一种含凝胶因子和微晶的两组分凝胶体系,由发蓝光的氨基酸衍生物和发红光的苊唑衍生物构成.在超声和热的协同作用下,可促进凝胶因子的羧基和微晶分子中的苊唑氮进行酸碱配位,从而实现该两组分在分子聚集体层次的共组装.两种化合物分别能发出蓝色和红色荧光,便于我们通过共聚焦显微镜(CLSM)来直接观测其微观聚集行为.CLSM图片表明通过加热冷却的方法所获得的干凝胶其微观结构是由发红光的棒状微晶和发蓝光的纤维组成的混合体;当通过一个预超声再加热-冷却的过程,可以得到一种均匀的同时发射蓝光和红光的凝胶纤维聚集体.结果表明,超声和热的协同作用可以有效地促进分子间的聚集,从而形成均相体系.进一步,我们通过超声诱导的分子间共聚集构建了微纳米层次上的多彩发光体系.该体系发射光谱可以通过两种成分的混合比例来精确调控,同时可以通过加入质子酸进一步调控.与此同时,酸的加入也诱导了两组分组装体发生由纤维向囊泡的形貌变化,并伴随着凝胶向溶胶的宏观相态转变.当加入碱后,该溶胶可恢复为凝胶.这种具有多重功能并易于调控的两组分凝胶在可视化分子识别、控制缓释、刺激响应和记忆材料等领域具有潜在应用价值.
A two-component gel system containing gel factor and microcrystals was designed and synthesized, which consisted of a blue-emitting amino acid derivative and a red-emitting oxazole derivative. Under the synergistic effect of ultrasound and heat, condensation The carboxyl group of the gel factor and the azathiazole nitrogen in the microcrystalline molecule undergo acid-base coordination to achieve co-assembly of the two components at the level of the molecular aggregates. Both compounds fluoresce blue and red, respectively, allowing us to pass through (CLSM) was used to directly observe the microscopic aggregation behavior.CLSM images show that the microcrystalline structure of the xerogel obtained by the method of heating and cooling is composed of a mixture of red-luminescent rod-like crystallites and blue-emitting fibers; when Through a pre-ultrasound reheating-cooling process, a homogeneous gel fiber aggregate that emits both blue and red light can be obtained. The results show that the synergistic effect of ultrasound and heat can effectively promote the aggregation of molecules to form Homogeneous system.Furthermore, we constructed a multi-nanometer-scale colorful luminescence system by ultrasound-induced intermolecular copolymerization.The emission spectrum of the system can be refined by mixing the two components At the same time, the addition of acid also induced the morphological changes from fiber to vesicle in the two-component assembly, accompanied by the transition from gel to the macroscopic phase of the sol. When added to the base, the sol can be restored to gel.This multifunctional and easily controlled two-component gel has potential applications in the fields of visualization of molecular recognition, controlled release, stimulation response and memory materials.