An amino-substituted 2-(2′-hydroxyphenyl)benzimidazole for the fluorescent detection of phosgene based on an ESIPT mechanism. Issue 18 (15th March 2021)

• Record Type: Journal Article
• Authors: Li, Zi-Jie; Zhang, Wen-Jie; Bi, Wen-Zhu; Ma, Qiu-Juan; Feng, Su-Xiang; Chen, Xiao-Lan; Qu, Ling-Bo
• Is Part Of: RSC advances. Volume 11:Issue 18(2021)
• Page Start: 10836
• Page End: 10841
• Publication Date: 2021-03-15
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d1ra00811k
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : An easily prepared phosgene probe, 5′-amino-2-(2′-hydroxyphenyl)benzimidazole (P1 ), is designed and studied. Based on ESIPT mechanism, P1 exhibits ratiometric, sensitive and selective detection of phosgene both in solution and gas phase. 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.