Biomaterials, Biodegradables and Biomimetics Research Group

Papers in Scientific Journals

Enantiomeric electro-oxidation of D- and L-glucose on chiral gold single crystal surfaces

Abstract

The enantioselectivity of the gold chiral surfaces towards the electrocatalytic oxidation of d- and l-glucose in neutral phosphate-buffered media is reported. Two enantiomorphic surfaces were used, Au{3 2 1}R and Au{3 2 1}S, and results obtained by cyclic voltammetry were compared with two non-chiral surfaces having the same terrace and step orientations, Au(1 1 1) and Au(2 1 1). An enantioselective effect is observed, Au{3 2 1}R exhibits a higher activity for d-glucose while Au{3 2 1}S exhibits a higher activity for l-glucose. The corresponding enantioselectivity factor was estimated to 10% for the process occurring at lower potential values and to 50% for the process at higher potential values. These results represent the first evidence that gold chiral surfaces are capable of enantiomeric discrimination.

Journal
Electrochemistry Communications
Volume
5
Issue
9
Pagination
741-746
Publisher
Elsevier
ISSN
1388-2481
URL
http://www.sciencedirect.com/science/article/pii/S1388248103001826
Keywords
Chiral surfaces, Enantioselectivity, Glucose electro-oxidation, Gold
Rights
Restricted Access
Peer Reviewed
Yes
Status
published
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