ja4036187_si_001.pdf (1.14 MB)
Surface Control of Alkyl Chain Conformations and 2D Chiral Amplification
journal contribution
posted on 2013-06-19, 00:00 authored by Nadine Hauptmann, Katharina Scheil, Thiruvancheril G. Gopakumar, Franziska
L. Otte, Christian Schütt, Rainer Herges, Richard BerndtTrioctyl-functionalized
triazatriangulenium (trioctyl-TATA) deposited
on Au(111) and Ag(111) surfaces by electrospray ionization was investigated
using low-temperature scanning tunneling microscopy. The molecule
surprisingly adsorbs with gauche rather than anti conformations of
the octyl groups. We observed chiral amplification in the islands.
Only one of the eight possible configurations of the octyl groups
was found in homochiral hexagonal networks. Quantum-chemical calculations
confirmed and explained the preference for the gauche conformations
of adsorbed trioctyl-TATA.