Multicolor fluorescent switches in gel systems controlled by alkoxyl chain and solvent
作者:Yue Xu、Pengchong Xue、Defang Xu、Xiaofei Zhang、Xingliang Liu、Huipeng Zhou、Junhui Jia、Xinchun Yang、Fengyong Wang、Ran Lu
DOI:10.1039/c0ob00091d
日期:——
Two simple molecules, 1 and 2 with D-π-A structure and alkoxyl groups, respectively, were designed and synthesized. Both compounds can gelatinize THF–water and DMSO. And compound 2 forms gel in acetone by ultrasonic stimulus. Interestingly, these gels exhibit aggregation-induced emission (AIE) during the sol–gel phase transformation. Moreover, the molecular self-assembled and photophysical properties can be controlled by the number of the alkoxyl chains and the type of the solvents. For example, 1 has an identical packing model and fluorescent colour in THF–water and DMSO gels. Contrarily, the self-assembly of molecule 2 strongly depends on the solvent. Furthermore, the gel phases of 2 formed in three solvents possess different fluorescent colours. Such as, THF–water gel emits yellow fluorescence, acetone gel has orange emission and red fluorescence appears in DMSO.
设计并合成了两种简单的D-π-A结构和烷氧基的分子1和2。这两种化合物均能凝胶化四氢呋喃-水和二甲基亚砜。而且,通过超声刺激,化合物2可以在丙酮中形成凝胶。有趣的是,这些凝胶在溶胶-凝胶相转变过程中表现出聚集诱导发光(AIE)现象。此外,分子自组装和光物理性质可以通过烷氧基链的数量和溶剂类型进行调控。例如,1在四氢呋喃-水凝胶和二甲基亚砜凝胶中具有相同的堆积模型和荧光颜色。相反,分子2的自组装强烈依赖于溶剂。此外,2在三种溶剂中形成的凝胶相具有不同的荧光颜色。例如,四氢呋喃-水凝胶发出黄色荧光,丙酮凝胶有橙色发射,而二甲基亚砜中则出现红色荧光。