Two-dimensional separation of [7]helicene enantiomers on Cu(111)

被引：65

作者：

Ernst, KH ^{[1
]}

Kuster, Y

Fasel, R

Müller, M

Ellerbeck, U

机构：

[1] Swiss Fed Labs Mat Testing & Res EMPA, Dubendorf, Switzerland

[2] Swiss Fed Res Stn, CH-8820 Wadenswil, Switzerland

[3] Free Univ Berlin, Inst Organ Chem, D-1000 Berlin, Germany

来源：

CHIRALITY | 2001年 / 13卷 / 10期

关键词：

aromatics; chemisorption; helicene; copper; ordered organic overlayers; self-assembly;

D O I：

10.1002/chir.10006

中图分类号：

R914 [药物化学];

学科分类号：

100701 ;

摘要：

The adsorption of heptahelicene, a helically shaped polyaromatic hydrocarbon (C30H18) on a Cu(111) surface was studied by means of thermal desorption mass spectrometry (TDMS) and low energy electron diffraction (LEED) at temperatures between 130-1,000 K under ultrahigh vacuum (UHV) conditions. The molecule in the monolayer remains intact up to 400 K Above that temperature it decomposes in several steps into carbon and hydrogen, desorbing subsequently as H-2. In the saturated monolayer of the racemate the enantiomers are separated into two different domains on the surface which are mirror images of each other. After adsorption of one enantiomer only, no mirror domains were observed. (C) 2001 Wiley-Liss, Inc.

引用

页码：675 / 678

页数：4

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