Title: Scanning tunneling microscopy and spectroscopy of donor-acceptor-donor triads at the liquid/solid interface
Authors: Uji-I, Hiroshi ×
Miura, A
Schenning, A
Meijer, EW
Chen, ZJ
Wurthner, F
De Schryver, Frans
Van der Auweraer, Mark
De Feyter, Steven #
Issue Date: Nov-2005
Publisher: Wiley-v c h verlag gmbh
Series Title: Chemphyschem vol:6 issue:11 pages:2389-2395
Abstract: By means of scanning tunneling microscopy (STM), the self-assembly of two organic donor-acceptor-donor triads (donor=oligo(p-phenylene vinylene) (OPV); acceptor=perylene diimide (PDI)) and their mixtures has been investigated at the liquid/solid interface, Both triads differ in the nature of the substituents and, therefore, in the redox properties of the central perylene diimide unit (H or Cl). Thanks to the submolecular resolution, the distinct electronic properties of the units, within a triad and between the two triads, are reflected by the relative STM contrast in the bias-dependent imaging experiments. Moreover, scanning tunneling spectroscopy reveals an inverse rectifying behavior of the OPV and H-substituted PDI units, which is discussed in the framework of quasi-resonant tunneling. A striking difference is observed for the Cl-substituted triad.
ISSN: 1439-4235
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
× corresponding author
# (joint) last author

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