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Selective fluorescence sensing of polynitroaromatic explosives using triaminophenylbenzene scaffolds

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Title Selective fluorescence sensing of polynitroaromatic explosives using triaminophenylbenzene scaffolds
 
Creator VISHNOI, P
WALAWALKAR, MG
SEN, S
DATTA, A
PATWARI, GN
MURUGAVEL, R
 
Subject PHOTOINDUCED ELECTRON-TRANSFER
COVALENT ORGANIC FRAMEWORKS
NITROAROMATIC EXPLOSIVES
DENSITY FUNCTIONALS
NITRATED EXPLOSIVES
NITRO EXPLOSIVES
POLYMER SENSORS
TRACE DETECTION
CHEMOSENSORS
FILMS
 
Description 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.
 
Publisher ROYAL SOC CHEMISTRY
 
Date 2014-12-28T12:03:02Z
2014-12-28T12:03:02Z
2014
 
Type Article
 
Identifier PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 16(22)10651-10658
1463-9076
1463-9084
http://dx.doi.org/10.1039/c4cp00930d
http://dspace.library.iitb.ac.in/jspui/handle/100/16428
 
Language English