SERS chiral recognition and quantification of enantiomers through cyclodextrin supramolecular complexation
Articolo
Data di Pubblicazione:
2011
Citazione:
SERS chiral recognition and quantification of enantiomers through cyclodextrin supramolecular complexation / S. Abalde-Cela, J.M. Hermida-Ramon, P. Contreras-Carballada, L. De Cola, A. Guerrero-Martinez, R.A. Alvarez-Puebla, L.M. Liz-Marzan. - In: CHEMPHYSCHEM. - ISSN 1439-4235. - 12:8(2011), pp. 1529-1535. [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. Enantioselective sensor: We introduce a simple approach in which a cyclodextrin is assembled onto the silver surface of a SERS platform for chiral recognition of enantiomers (see picture). Trapping properties, chiral discrimination and quantification of the R,R- and S,S-enantiomers of hydrobenzoin by surface-enhanced Raman scattering (SERS) spectroscopy are demonstrated.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
cyclodextrins; enantioselectivity; hybrid nanomaterials; SERS; supramolecular chemistry
Elenco autori:
S. Abalde-Cela, J.M. Hermida-Ramon, P. Contreras-Carballada, L. De Cola, A. Guerrero-Martinez, R.A. Alvarez-Puebla, L.M. Liz-Marzan
Link alla scheda completa: