Design protocols in triarylamine cored dendrimer-based explosive sensors

Vamvounis, George, Shaw, Paul E., and Burn, Paul L. (2013) Design protocols in triarylamine cored dendrimer-based explosive sensors. Journal of Materials Chemistry C, 1 (7). pp. 1322-1329.

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Abstract

The preparation, photophysical characterisation and explosive sensing of two first-generation triarylamine-based dendrimers are reported. The dendrimers are constructed of a triphenylamine core, dendrons comprised of a phenyl branching unit with thiophene (Dendrimer 1) or bithiophene (Dendrimer 2) moieties, and dodecyl surface groups. By simply changing the number of thiophene units within the dendrons, it was found that the emissive chromophore could be switched from the centre (Dendrimer 1) to the dendrons (Dendrimer 2). Both Dendrimer 1 and 2 detected nitro-aromatic and -aliphatic analytes by fluorescence quenching, with the former showing a much greater response. In particular, Dendrimer 1 showed a particularly high affinity for the difficult-to-detect nitroaliphatic taggant 2,3-dinitro-2,3-dimethylbutane (DMNB). A combination of steady-state and time-resolved Stern–Volmer measurements revealed that the high affinity for DMNB was due to a combination of long luminescence lifetime and dominant static quenching.

Item ID: 31990
Item Type: Article (Research - C1)
ISSN: 2050-7534
Funders: Australian Research Council
Projects and Grants: ARC DP0986838, ARC Australian Research Fellowship DP1095404, ARC Federation Fellow FF0668728
Date Deposited: 23 May 2014 00:15
FoR Codes: 03 CHEMICAL SCIENCES > 0303 Macromolecular and Materials Chemistry > 030306 Synthesis of Materials @ 25%
03 CHEMICAL SCIENCES > 0303 Macromolecular and Materials Chemistry > 030303 Optical Properties of Materials @ 50%
03 CHEMICAL SCIENCES > 0305 Organic Chemistry > 030503 Organic Chemical Synthesis @ 25%
SEO Codes: 81 DEFENCE > 810107 National Security @ 80%
86 MANUFACTURING > 8606 Industrial Chemicals and Related Products > 860604 Organic Industrial Chemicals (excl. Resins, Rubber and Plastics) @ 20%
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