Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/xmlui/handle/100/16436
Title: Selective fluorescence sensing of polynitroaromatic explosives using triaminophenylbenzene scaffolds
Authors: VISHNOI, P
WALAWALKAR, MG
SEN, S
DATTA, A
PATWARI, GN
MURUGAVEL, R
Issue Date: 2014
Publisher: ROYAL SOC CHEMISTRY
Citation: PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 16(22)10651-10658
Abstract: A supramolecular fluorophore, 1,3,5-tris(4 '-aminophenyl)benzene (TAPB), selectively senses polynitroaromatic compounds (PNAC), viz. 2,4,6-trinitrotoluene (TNT), 2,4-dinitrotoluene (DNT), picric acid (PA), m-dinitrobenzene (m-DNB) and p-dinitrobenzene (p-DNB) through donor-acceptor complexation. Steady-state and time resolved fluorescence measurements indicate predominantly static quenching of the TAPB fluorophore with TNT, DNT, m-DNB and p-DNB. In the case of PA, a new emissive band with a marginally longer lifetime emerges due to complex formation with TAPB. The selectivity of sensing action is rationalized through computation of HOMO and LUMO energies for both the fluorophore and the analytes using the M06-2X/6-311+G(d,p) level of theory. Practical utility of the fluorophore has also been demonstrated with TNT and DNT vapour.
URI: http://dx.doi.org/10.1039/c4cp00930d
http://dspace.library.iitb.ac.in/jspui/handle/100/16436
ISSN: 1463-9076
1463-9084
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