Dual sites fluorescence probe for hydrogen sulfide: AIEE activity and supramolecular assembly with β-cyclodextrin

One aggregation-induced emission enhancement (AIEE) active compound based on alpha-cyanostilbenes and maleic anhydride group were synthesized. The "Turn-On" fluorescence recognition for H2S was evaluated both in aqueous solution and cells. It was found that cyanostilbenes group acts as the first reactive site and maleimide group acts as the second site to H2S. Supramolecular assembly with beta-cyclodextrin successfully revealed the reaction mechanism of 3-state model.