Explosive sensing with fluorescent dendrimers: The role of collisional quenching

Olley, DA, Wren, EJ, Vamvounis, G, Fernee, MJ, Wang, X, Burn, PL, Meredith, P and Shaw, PE (2011) Explosive sensing with fluorescent dendrimers: The role of collisional quenching. Chemistry of Materials, 23 3: 789-794. doi:10.1021/cm1020355

Author Olley, DA
Wren, EJ
Vamvounis, G
Fernee, MJ
Wang, X
Burn, PL
Meredith, P
Shaw, PE
Title Explosive sensing with fluorescent dendrimers: The role of collisional quenching
Journal name Chemistry of Materials   Check publisher's open access policy
ISSN 0897-4756
Publication date 2011-02
Year available 2010
Sub-type Article (original research)
DOI 10.1021/cm1020355
Volume 23
Issue 3
Start page 789
End page 794
Total pages 6
Place of publication Washington DC, United States
Publisher American Chemical Society
Collection year 2011
Language eng
Abstract We have investigated a series of branched fluorescent sensing compounds with thiophene units in the arms and triphenylamine centers for the detection of nitrated model compounds for 2,4,6-trinitrotoluene (TNT) and the plastic explosives taggant 2,3-dimethyl-2,3-dinitrobutane (DMNB). Stern-Volmer measurements in solution show that the fluorescence is more efficiently quenched by nitroaromatic compounds when compared to a non-nitrated quencher, benzophenone. Simple modification of the structure of the sensing compound was found to result in significant changes to the sensitivity and selectivity toward the nitrated analytes. A key result from time-resolved fluorescent measurements showed that the chromophore-analyte interaction was primarily a collisional process. This process is in contrast to conjugated polymers where static quenching dominates, a difference that could offer a potentially more powerful detection mechanism. © 2010 American Chemical Society.
Keyword Conjugated polymers
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Publication Date (Web): September 14, 2010

Document type: Journal Article
Sub-type: Article (original research)
Collections: Centre for Quantum Computer Technology Publications
Official 2011 Collection
School of Chemistry and Molecular Biosciences
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Citation counts: TR Web of Science Citation Count  Cited 77 times in Thomson Reuters Web of Science Article | Citations
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Created: Tue, 15 Mar 2011, 11:09:08 EST by Jo Hughes on behalf of School of Chemistry & Molecular Biosciences