BIBLIOS

Document type
Journal articles

Document subtype
Full paper

Title
Enantiomeric electro-oxidation of d- and l-glucose on chiral gold single crystal surfaces

Participants in the publication
A. Martins (Author)
Virginia C Ferreira (Author)
Dep. Química e Bioquímica
Dep. Química e Bioquímica
CQB
A. Queirós (Author)
I. Aroso (Author)
F. Silva (Author)
J. Feliu (Author)

Summary
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.


Institution
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DO PORTO

Where published
Electrochemistry Communications

Publication Identifiers
ISSN - 1388-2481

Publisher
Elsevier BV



Document Identifiers
URL - http://dx.doi.org/10.1016/s1388-2481(03)00182-6
DOI - https://doi.org/10.1016/s1388-2481(03)00182-6

Rankings
SCOPUS Q1 (2011) - 2.14 - Electrochemistry
Web Of Science Q1 (2017) - 4.66 - ELECTROCHEMISTRY - SCIE
SCIMAGO Q1 (2016) - 1.626 - Electrochemistry

Keywords
Enantioselectivity Chiral surfaces Gold Glucose electro-oxidation

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