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@ARTICLE{Ebeling:889775,
author = {Ebeling, René and Arasu, Narendra P. and Bensch, Lisa and
Schulze Lammers, Bertram and Mayer, Bernhard and Müller, T.
J. J. and Vázquez, Héctor and Karthäuser, Silvia},
title = {{P}reservation of the donor–acceptor character of a
carbazole–phenalenone dyad upon adsorption on {P}t(111)},
journal = {Nanoscale advances},
volume = {3},
number = {2},
issn = {2516-0230},
address = {Cambridge},
publisher = {Royal Society of Chemistry},
reportid = {FZJ-2021-00388},
pages = {538-549},
year = {2021},
abstract = {Donor–acceptor molecules are a subject of great attention
due to their immense potential in molecular electronics and
photovoltaics. Despite numerous extensive studies
demonstrating their functionality in solution, the
donor–acceptor character is usually lost upon adsorption
on a conducting substrate. Here the concept of breaking the
conjugation between the donor and acceptor unit by insertion
of a bridge is used. Furthermore, the bridge introduces a
kink into the dyad and thus, reduces the possibility of
hybridization with the substrate. A
donor–bridge–acceptor dyad composed of carbazole and
phenalenone units joined through a flexible bridge is
synthesized and deposited on a Pt(111) surface. Its
electronic properties are investigated with a combination of
low temperature scanning tunneling microscope measurements
and density functional theory simulations. Two preferential
adsorption configurations are identified, in which
individual molecules form strong bonds to the substrate and
to a Pt adatom. Differential conductance measurements and
atomistic simulations evidence the preservation of a reduced
donor–acceptor character upon adsorption of the molecule,
where this reduction is ascribed to the strong
molecule-metal hybridization. Our results highlight the
changes in donor–acceptor character of the dyad induced by
the substrate and provide guidelines for the use of
donor–bridge–acceptor molecules as functional units in
solid-state devices.},
cin = {PGI-7 / JARA-FIT},
ddc = {540},
cid = {I:(DE-Juel1)PGI-7-20110106 / $I:(DE-82)080009_20140620$},
pnm = {5233 - Memristive Materials and Devices (POF4-523)},
pid = {G:(DE-HGF)POF4-5233},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000611877100024},
doi = {10.1039/D0NA00925C},
url = {https://juser.fz-juelich.de/record/889775},
}