1 research outputs found
Tuning the Planarity of an Aromatic Thianthrene-Based Molecule on Au(111)
Nonplanar aromatic molecules are interesting systems
for organic
electronics and optoelectronics applications due to their high stability
and electronic properties. By using scanning tunneling microscopy
and spectroscopy, we investigated thianthrene-based molecules adsorbed
on Au(111), which are nonplanar in the gas phase and the bulk solid
state. Varying the molecular coverage leads to the formation of two
different kinds of self-assembled structures: close-packed islands
and quasi-one-dimensional chains. We found that the molecules are
nonplanar within the close-packed islands, while the configuration
is planar in the molecular chain and for single adsorbed molecules.
Using vertical tip manipulation to isolate a molecule from the island,
we demonstrate the conversion of a nonplanar molecule to its planar
configuration. We discuss the two different geometries and their electronic
properties with the support of density functional theory calculations