A quinoline-based compound for explosive 2,4,6-trinitrophenol sensing: experimental and DFT-D3 studiesElectronic supplementary information (ESI) available. See DOI: 10.1039/c8nj00817e

A quinoline-based Schiff base compound, 2,5-dimethylbis(quinolin-2-ylmethylene)benzene-1,4-diamine (DQB), has been found to be a chemosensor for 2,4,6-trinitrophenol (TNP). DQB has been synthesized by condensation between two equivalents of quinoline-4-carboxaldehyde and one equivalent of 2,5-dimeth...

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Main Authors: Halder, Shibashis, Ghosh, Pritam, Hazra, Ananta, Banerjee, Priyabrata, Roy, Partha
Format: Article
Language:English
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Summary:A quinoline-based Schiff base compound, 2,5-dimethylbis(quinolin-2-ylmethylene)benzene-1,4-diamine (DQB), has been found to be a chemosensor for 2,4,6-trinitrophenol (TNP). DQB has been synthesized by condensation between two equivalents of quinoline-4-carboxaldehyde and one equivalent of 2,5-dimethyl-1,4-diaminobenzene in methanol under ambient reaction conditions and characterized by using standard spectroscopic methods. It shows an emission band at 440 nm with high intensity ( λ ex = 390 nm). The emission intensity is quenched severely in the presence of TNP while other nitroaromatic compounds fail to reduce the intensity, signifying high selectivity towards TNP. The fluorescence quenching mechanism can be explained by theoretical calculations as an RET-ICT based pathway. A quinoline-based compound, 2,5-dimethylbis(quinolin-2-ylmethylene)benzene-1,4-diamine (DQB), has been found to be a turn-off chemosensor for 2,4,6-trinitrophenol.
ISSN:1144-0546
1369-9261
DOI:10.1039/c8nj00817e