Journal
CHEMISTRY-AN ASIAN JOURNAL
Volume 3, Issue 11, Pages 1962-1967Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.200800233
Keywords
dicarboxylates; geometrical isomers; gold; nanoparticles; sensors
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Funding
- Korea Health Industry Development Institute [A05-0426-B20616-05N1-00010A]
- Korea Research Foundation [KRF-2005-070-C00078]
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A colorimetric sensing system based on gold nanoparticles functionalized with a water-soluble anion-recognition motif, an o-(carboxamido)trifluoroacetophenone analogue, has been developed. The nanoparticle system selectively senses specific isomers of dicarboxylates that are geometrically favorable for the binding-induced aggregation process; thus, it discriminates a trans-dicarboxylate fumarate from its cis-isomer maleate, and benzene-1,4-dicarboxylate from its isomeric benzene-1,2-and benzene-1,3-dicarboxylates in water, exhibiting a color change from red to blue.
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