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- W3043132072 abstract "Abstract In this work, we designed a dual-fluorophore-based water sensor 5-(dimethylamino)- N'-(pyren-1-ylmethylene)naphthalene-1-sulfonohydrazide (PDH) by combining pyrene, which exhibits monomer/excimer switching emission, and dansyl, which shows typical intramolecular charge transfer (ICT) activity. The effects of solvents on PDH and two control compounds were studied. Results showed that PDH exhibited tunable fluorescence properties, and the two fluorescent units of PDH could behave independently and synergistically. Generally, the fluorescent emission of PDH displayed two distinct modes in various solvents. On the one hand, only pyrene emission was observed in N, N-dimethylformamide (DMF), acetonitrile (AN), ethanol (EtOH), dimethyl sulfoxide (DMSO), methanol (MeOH), acetone, and tetrahydrofuran (THF) because these solvents affected the push–pull interactions between dimethyamino moiety and naphthalenesulfonyl and the aggregation behavior. On the other hand, efficient Forster resonance energy transfer (FRET) from the pyrene unit to the dansyl moiety was observed in dichloromethane (CH2Cl2), chloroform (CHCl3), ethyl acetate (EA), toluene, and water (H2O). The fluorescence spectra displayed strong dansyl emission and weak pyrene monomer emission due to the synergy of ICT and FRET. By taking advantage of the monomer/excimer switching, ICT, and FRET activities, the fluorescence tunability of PDH was applied for the differentiation of solvents and discriminative detection of H2O content in three organic solvents, including acetone, DMF, and DMSO." @default.
- W3043132072 created "2020-07-23" @default.
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- W3043132072 date "2020-11-01" @default.
- W3043132072 modified "2023-10-17" @default.
- W3043132072 title "Highly sensitive pyrene–dansyl conjugate-based fluorescent sensor for discriminative detection of water in organic solvents" @default.
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- W3043132072 doi "https://doi.org/10.1016/j.dyepig.2020.108685" @default.
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