Adsorption mode of the chiral modifier cinchonidine on Au(111)

被引：17

作者：

Behzadi, B.

Ferri, D.

Baiker, A.

Ernst, K. -H.

机构：

[1] Swiss Fed Labs Mat Testing & Res, Empa, CH-8600 Dubendorf, Switzerland

[2] ETH, Dept Chem & Appl Biosci, Inst Chem & Bioengn, HCI, CH-8093 Zurich, Switzerland

来源：

APPLIED SURFACE SCIENCE | 2007年 / 253卷 / 07期

关键词：

chirality; enantioselective heterogeneous catalysis; cinchonidine; quinoline; chiral modifier; Au(111);

D O I：

10.1016/j.apsusc.2006.07.084

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The adsorption of the chiral modifier cinchonidine on Au(1 1 1) in UHV has been studied by means of TPD, LEED and XPS. In the monolayer the molecule is bound via nitrogen]one pair electrons of its quinoline part rather than via the pi-system of this aromatic moiety. Intact molecular desorption is only observed for the multilayers. Decomposition in the first monolayer upon heating occurs above 400 K, indicating a stronger interaction in the monolayer. No long-range ordered structures were observed via LEED. Long-time exposure leads to rearrangement and further stabilization of the first molecular monolayer. Quinoline is bound to gold via the nitrogen lone pair as well. The binding energy of 9.6 kcal/mol is characteristic for physisorption. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：3480 / 3484

页数：5

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