Two-dimensional separation of helicene enantiomers on Cu(111)
Article first published online: 30 OCT 2001
Copyright © 2001 Wiley-Liss, Inc.
Special Issue: Proceedings from the 12th International Symposium on Chiral Discrimination, Chamonix-Mont Blanc, September 2000
Volume 13, Issue 10, pages 675–678, 2001
How to Cite
Ernst, K.-H., Kuster, Y., Fasel, R., Müller, M. and Ellerbeck, U. (2001), Two-dimensional separation of helicene enantiomers on Cu(111). Chirality, 13: 675–678. doi: 10.1002/chir.10006
- Issue published online: 30 OCT 2001
- Article first published online: 30 OCT 2001
- Manuscript Accepted: 1 MAY 2001
- Manuscript Received: 18 NOV 2000
- the Schweizer Nationalfonds. Grant Number: NFP 36 4036-043974
- ordered organic overlayers;
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 H2. 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. Chirality 13:675–678, 2001. © 2001 Wiley-Liss, Inc.