期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 5, 期 9, 页码 741-746出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/S1388-2481(03)00182-6
关键词
gold; chiral surfaces; enantioselectivity; glucose electro-oxidation
The enantioselectivity of the gold chiral surfaces towards the electrocatalvtic oxidation of D- and L-glucose in neutral phosphate-buffered media is reported. Two enantiomorphic surfaces were used, Au{32}(R) and Au{321}(S), and results obtained by cyclic voltammetry were compared with two non-chiral surfaces having the same terrace and step orientations, Au(111) and Au(211). All enantioselective effect is observed, Au {321}(R) exhibits a higher activity for D-glucose while Au{3 2 1}(S) exhibits a higher activity for L-glucose. The corresponding en anti oselectivity 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. (C) 2003 Elsevier B.V. All rights reserved.
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