Bohannan Eric W, Kothari Hiten M, Nicic Igor M, Switzer Jay A
Department of Chemistry and Graduate Center for Materials Research, University of Missouri-Rolla, Rolla, Missouri 65409-1170, USA.
J Am Chem Soc. 2004 Jan 21;126(2):488-9. doi: 10.1021/ja039422+.
Epitaxial films of monoclinic CuO have been electrodeposited on single-crystal Cu(111) from solutions containing either (S,S)- or (R,R)-tartrate. X-ray pole figure analysis reveals that the CuO film grown from (S,S)-tartrate exhibits a (1) out-of-plane orientation while the film grown from (R,R)-tartrate has a (11) orientation. Even though CuO does not crystallize within a chiral space group, the orientations obtained exhibit a surface chirality similar to that obtained from high index fcc metal surfaces. The films were shown to be enantioselective toward the catalytic oxidation of tartrate molecules by cyclic voltammetry. The technique should prove to be applicable to the electrodeposition of chiral surfaces of other low-symmetry materials on achiral substrates and should prove to be of use to those interested in the synthesis, separation, and detection of chiral molecules.
单斜晶系的CuO外延膜已通过电沉积法，从含有（S,S）-或（R,R）-酒石酸盐的溶液中沉积在单晶Cu(111)上。X射线极图分析表明，由（S,S）-酒石酸盐生长的CuO膜呈现出（1）面外取向，而由（R,R）-酒石酸盐生长的膜具有（11）取向。尽管CuO不在手性空间群中结晶，但所获得的取向表现出与从高指数面心立方金属表面获得的表面手性相似。通过循环伏安法表明，这些膜对酒石酸盐分子的催化氧化具有对映选择性。该技术应被证明适用于在非手性衬底上电沉积其他低对称性材料的手性表面，并且应被证明对那些对手性分子的合成、分离和检测感兴趣的人有用。
