A quinoline-based compound for explosive 2, 4, 6-trinitrophenol sensing: experimental and DFT-D3 studies. (27th April 2018)

• Record Type: Journal Article
• Authors: Halder, Shibashis; Ghosh, Pritam; Hazra, Ananta; Banerjee, Priyabrata; Roy, Partha
• Is Part Of: New journal of chemistry. Volume 42:Number 11(2018)
• Page Start: 8408
• Page End: 8414
• Publication Date: 2018-04-27
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c8nj00817e
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : 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. Abstract : 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.