Zusammenfassung
2-Mercaptopyrimidine (2MPy) forms a stable two-dimensional network on
Au(1 1 1). The 2MPy dimeric structure forms chains separated by narrow
channels that can trap a variety of molecules such as oligopyridines and
arenes. In this work, the 2MPY structure was used to intercalate
pyridine and its acid derivatives, specifically, picolinic acid,
dipicolinic acid, niconitic acid and isonicotinic acid. Pyridine and the
pyridine carboxylic acids were intercalated into the thiol structure in
a 2:1 stoichiometry. The STM contrast of the carboxylic group varies
with its position on the pyridine ring and with the tunneling parameters
employed to acquire the images. (c) 2007 Elsevier B.V. All rights
reserved.
Nutzer