SERS Chiral Recognition and Quantification of Enantiomers through Cyclodextrin Supramolecular Complexation
- 15 December 2010
- journal article
- research article
- Published by Wiley in Chemphyschem
- Vol. 12 (8), 1529-1535
- https://doi.org/10.1002/cphc.201000800
Abstract
We introduce here a simple approach in which a cyclodextrin, functionalized with thiols in the narrower rim, is assembled onto the silver surface of a SERS platform composed of polystyrene beads coated with silver nanoparticles. Trapping properties of the fabricated sensor are demonstrated through the retention of different enantiomers (R,R or/and S,S) of hydrobenzoin (HBZ), a molecule that has not been reported before in SERS because it has no affinity for coinage metal surfaces. Further, selective recognition of each enantiomer and semiquantification of its proportion in a racemic mixture are provided by the analysis of the SERS spectra of the HBZ–cyclodextrin complex, in full agreement with the surface selection rules.Keywords
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