Document Detail


Selective detection of trace nitroaromatic, nitramine, and nitrate ester explosive residues using a three-step fluorimetric sensing process: a tandem turn-off, turn-on sensor.
MedLine Citation:
PMID:  17944906     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
Detection of trace quantities of explosive residues plays a key role in military, civilian, and counter-terrorism applications. To advance explosives sensor technology, current methods will need to become cheaper and portable while maintaining sensitivity and selectivity. The detection of common explosives including trinitrotoluene (TNT), cyclotrimethylenetrinitramine, cyclotetramethylene-tetranitramine, pentaerythritol tetranitrate, 2,4,6-trinitrophenyl-N-methylnitramine, and trinitroglycerin may be carried out using a three-step process combining "turn-off" and "turn-on" fluorimetric sensing. This process first detects nitroaromatic explosives by their quenching of green luminescence of polymetalloles (lambda em approximately 400-510 nm). The second step places down a thin film of 2,3-diaminonaphthalene (DAN) while "erasing" the polymetallole luminescence. The final step completes the reaction of the nitramines and/or nitrate esters with DAN resulting in the formation of a blue luminescent traizole complex (lambda(em) = 450 nm) providing a "turn-on" response for nitramine and nitrate ester-based explosives. Detection limits as low as 2 ng are observed. Solid-state detection of production line explosives demonstrates the applicability of this method to real world situations. This method offers a sensitive and selective detection process for a diverse group of the most common high explosives used in military and terrorist applications today.
Authors:
Jason C Sanchez; Sarah J Toal; Zheng Wang; Regina E Dugan; William C Trogler
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2007-10-17
Journal Detail:
Title:  Journal of forensic sciences     Volume:  52     ISSN:  0022-1198     ISO Abbreviation:  J. Forensic Sci.     Publication Date:  2007 Nov 
Date Detail:
Created Date:  2007-12-20     Completed Date:  2008-02-28     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0375370     Medline TA:  J Forensic Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1308-13     Citation Subset:  -    
Affiliation:
Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA 92093-0358, USA.
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