NDLI: Silica anchored fluorescent organosilicon polymers for explosives separation and detection

Content Provider	Royal Society of Chemistry (RSC)
Author	Martinez, H. Paul Trogler, William C. Grant, Christian D. Reynolds, John G.
Copyright Year	2012
Abstract	The luminescent organosilicon copolymers poly(silafluorenyldiethynylspirobifluorene) and poly(tetrasilolediethynylspirobifluorene) have been covalently linked to a silica gel thin layer chromatography (TLC) support through the use of a trimethoxysilyl end group. Surface functionalization of silica with the fluorescent sensing polymer allows for more efficient quenching by the analyte, due to the small amount of fluorophore present, thus yielding enhanced detection sensitivity. The attachment of the sensing polymers onto a chromatographic support also allows for simultaneous separation of an explosive mixture, and component identification through the use of multiple sensing polymers. In a 1.0 mm2 area solution spotted onto the fluorescent silica plate, detection limits obtained for the explosives TNT (2,4,6-trinitrotoluene), DNT (2,6-dinitrotoluene), PA (picric acid), Tetryl (N-methyl-N,2,4,6-tetranitroaniline), HMX (octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine), RDX (1,3,5-trinitro-1,3,5-triazacyclohexane), and Cl-20 (2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane) ranged from 4 to 750 pg mm−2. Since less than 350 pg of highly fluorescent polymer is required to coat each TLC plate, the relatively small amounts of explosive being detected still represent an excess of quencher over sensing fluorophore.
Starting Page	2908
Ending Page	2914
Page Count	7
File Format	HTM / HTML PDF
ISSN	09599428
Volume Number	22
Issue Number	7
Journal	Journal of Materials Chemistry
DOI	10.1039/c2jm15214b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	TNT Tetryl Organosilicon Silica gel Chromatography Silicon dioxide Polymer Analyte Fluorophore Trinitrotoluene 4-Dinitrotoluene Acid RDX
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry

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