ANYL 136 |
| Patterned after the olfactory senses of animals, electronic noses contain multiple receptors. Each analyte causes some or all of the sensor elements to respond to different degrees, producing unique response patterns that encode each vapor. Most explosives are nitro(aromatic) compounds. They are known to interact (in solution) with porphyrins, causing a quenching of the fluorescence, though the influence of the structural variation of a porphyrinoid on the binding of different nitroaromatics is little investigated. We will report here the results of a fluorescence quenching study using a combination of ~20 different nitro- and non-nitro-compounds and ~50 structurally very different porphyrinoids: meso-aryl- and ß-alkyl-porphyrins, chlorins, corroles, N-confused porphyrins, porpholactones, phthalocyanines, pyrrole-modified porphyrins, and their metal (e.g. Ni, Cu, Zn, Ag, Hg, Pt, Pd, Hg, Cd) complexes. The recording of the distinct differences between the interaction of different nitroaromatics with the porphyrin library serves as proof of principle that a porphyrin-based sensor array could be assembled for the specific detection of, for instance, TNT vapors. -2007--> |
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General Posters
7:00 PM-9:00 PM, Sunday, August 19, 2007 BCEC -- Exhibit Hall - B2, Poster
Sci-Mix
Division of Analytical Chemistry |