Abstract
Two new CF3-substituted α-cyanostilbenes were synthesized and characterized by NMR, UV–visible, and fluorescence spectroscopies. Fluorescence emission of the compounds reveals polarity-dependent solvatochromic effects. Furthermore, both compounds show aggregation-induced emission in dioxane/water binary solutions. Results were supported by density functional theory calculations. Interestingly, the compounds display selective detection of picric acid with limits of detection on the order of 10−7 M. The results indicate that the position of a CF3 group on α-cyanostilbenes can be used to tune the aggregation-induced emission for monitoring traces of picric acid in aqueous media and solid support.
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