Abstract
AbstractA new fluorescent chemosensor 2,2′‐((1E,1′E)‐hydrazine‐1,2‐diylidenebis(methanylylidene))bis(4‐(1,2,2‐triphenylvinyl)phenol) TPESAA incorporated with salicylaldehyde azine motif was developed based on aggregation‐induced emission (AIE). The probe TPESAA was prepared from 4‐hydroxy tetraphenyl ethylene which underwent formylation followed by condensation with hydrazine hydrate. It showed ratiometric fluorescence quenching behavior to Cu2+, which could induce naked‐eye color changes from colorless to pale yellow. Moreover, it displayed excellent sensitivity and selectivity toward Cu2+ without interference from other metal ions. The extent of quenching is dependent on the concentration of Cu2+ in the range of 0.5–7.5 μM, and a remarkable detection limit (30.9 nM) can be achieved. Furthermore, the obtained Cu2+ complex could be applied to quantitative determination of cysteine in the range of 0.2–2 μM with a good linear relationship.
Published Version
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