Summary: Visualization of Hydrogen Bonding and Associated Chirality in Methanol Hexamers
Timothy J. Lawton,1
Ashleigh E. Baber,1
and E. Charles H. Sykes1,*
Department of Chemistry, Tufts University, Medford, Massachusetts 02155-5813, USA
Instituto de Cata´lisis y Petroleoqui´mica, CSIC, Marie Curie 2, E-28049 Madrid, Spain
Thomas Young Centre, London Centre for Nanotechnology and Department of Chemistry, University College London,
London WC1E 6BT, United Kingdom
(Received 4 August 2011; revised manuscript received 13 October 2011; published 16 December 2011)
Using a combination of scanning tunneling microscopy (STM) and density functional theory the
hydrogen bond directionality and associated chirality of enantiopure clusters is visualized and controlled.
This is demonstrated with methanol hexamers adsorbed on Au(111), which depending on their chirality,
adopt two distinct molecular footprints on the surface. Controlled STM tip manipulations were used to
interconvert the chirality of entire clusters and to break up metastable chain structures into hexamers.
DOI: 10.1103/PhysRevLett.107.256101 PACS numbers: 68.43.Hn, 68.37.Ef, 68.43.Bc, 68.47.De