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• W2936624044 startingPage "5690" @default.
• W2936624044 abstract "As highly toxic and accessible chemical reagents, phosgene and triphosgene have become a serious threat to public safety. So, it is highly desirable to develop facile methods to detect and recognize them. In this article, a novel fluorescent chemosensor, Phos-4, has been constructed with 1,8-naphthalimide as the fluorophore and 2-(2-aminophenyl)imidazol as the recognition sites for discrimination between phosgene and triphosgene in a dual-channel mode for the first time. Owing to the difference in electrophilicity between chlorocarbonyl and trichloromethoxycarbonyl, the sensing reaction of Phos-4 with phosgene undergoes two carbamylations to afford a cyclic product with green fluorescence, and only one carbamylation occurs for triphosgene to form a noncyclic product with blue fluorescence. The sensor Phos-4 exhibits high sensitivity (the limit of detection, 3.2 nM, for phosgene, and 1.9 nM, for triphosgene) and high selectivity in solutions. Furthermore, facile test papers containing Phos-4-embedded nanofibrous membrane have been fabricated by the electrospinning technology. The test papers can provide visual and selective detection of phosgene with a lower limit of detection (42 ppb) and a faster response (≤10 s) in the gas phase over those in solutions. The test paper with Phos-4 is promising to be a practical detection tool of gaseous phosgene." @default.
• W2936624044 created "2019-04-25" @default.
• W2936624044 creator A5022994640 @default.
• W2936624044 creator A5032447166 @default.
• W2936624044 creator A5065880271 @default.
• W2936624044 date "2019-04-17" @default.
• W2936624044 modified "2023-10-16" @default.
• W2936624044 title "Fluorescent Chemosensor for Dual-Channel Discrimination between Phosgene and Triphosgene" @default.
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• W2936624044 doi "https://doi.org/10.1021/acs.analchem.8b05777" @default.
• W2936624044 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30994328" @default.
• W2936624044 hasPublicationYear "2019" @default.
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