Selective colorimetric sensing of geometrical isomers of dicarboxylates in water by using functionalized gold nanoparticles.
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.
Chatterjee
Amrita
A
Department of Chemistry and Center for Integrated Molecular Systems, Pohang University of Science and Technology, San 31 Hyoja-dong, Pohang 790-784, Korea.
Oh
Dong Ju
DJ
Kim
Kyung Mi
KM
Youk
Kyung-Seog
KS
Ahn
Kyo Han
KH
D002264:Carboxylic Acids / Q000737:chemistry*; D003124:Colorimetry / Q000379:methods*; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D013237:Stereoisomerism; D014867:Water / Q000737:chemistry*
D002264:Carboxylic Acids; D014867:Water; D006046:Gold