Abstract
A novel rigid anion receptor 1 containing thiosemicarbazone groups were synthesized. Receptor 1 displayed competitive turn‐off fluorescence and colorimetric response for hydrogen pyrophosphate. This recognition process was confirmed by UV–vis, fluorescence titrations. A detailed analysis of the TD‐density functional theory calculations was consistent with the observed colorimetric experiments. These experiments revealed that the colorimetric and fluorescent response is triggered by thiourea/ HP2O73− hydrogen bonding.
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