Spectroscopic fingerprints of amine and imide functional groups in self-assembled monolayers.
The electronic structures of naphthalene tetracarboxylic diimide (NTCDI) and 1,4-bis(4,6-diamino-1,3,5-triazin-2-yl)benzene (BDG) monolayer assemblies grown on Au(111) are investigated by photoemission spectroscopy, X-ray absorption, and density functional theory. The different spectroscopic features in the absorption and core-level photoemission spectra are understood in terms of contributions from different core and molecular levels at N- and O-atom sites. This study provides clear spectroscopic fingerprints for amine and imide functional end groups, which drive the self-organization process in a number of planar, pi-conjugated molecular structures.
Ruiz-Osés
Miguel
M
Departamento de Física Aplicada I, Universidad del País Vasco, Plaza de Oñate 2, 20018 Donostia-San Sebastián, Spain.
Kampen
Thorsten
T
González-Lakunza
Nora
N
Silanes
Iñaki
I
Schmidt-Weber
Philipp M
PM
Gourdon
André
A
Arnau
Andrés
A
Horn
Karsten
K
Ortega
J Enrique
JE