An amino-substituted 2-(2′-hydroxyphenyl)benzimidazole for the fluorescent detection of phosgene based on an ESIPT mechanism
Zi‐Jie Li, Wenjie Zhang, Wen‐Zhu Bi, Qiujuan Ma, Suxiang Feng, Xiaolan Chen, Lingbo Qu
Abstract
In this work, an ESIPT-based fluorescence probe, 5'-amino-2-(2'-hydroxyphenyl)benzimidazole (P1), was synthesized and explored for the ratiometric detection of phosgene. Compared to 2-(2'-hydroxyphenyl)benzimidazole (HBI), P1 exhibits high sensitivity (LoD = 5.3 nM) and selectivity toward phosgene with the introduction of the amine group. Furthermore, simple P1 loaded test papers are manufactured and display selective fluorescent detection of phosgene in the gas phase.
Topics & Concepts
PhosgeneBenzimidazoleAmine gas treatingChemistryFluorescenceSelectivityPhotochemistryCombinatorial chemistryOrganic chemistryPhysicsQuantum mechanicsCatalysisPesticide Exposure and ToxicityMolecular Sensors and Ion DetectionSulfur Compounds in Biology