1 research outputs found
Spectroscopic Scanning Tunneling Microscopy Studies of Single Surface-Supported Free-Base Corroles
Corroles are versatile chemically active agents in solution.
Expanding
their applications toward surface-supported systems requires a fundamental
knowledge of corrole–surface interactions. We employed the
tip of a low-temperature scanning tunneling microscope as local probe
to investigate at the single-molecule level the electronic and geometric
properties of surface-supported free-base corrole molecules. To provide
a suitable reference for other corrole-based systems on surfaces,
we chose the archetypal 5,10,15-trisÂ(pentafluorophenyl)Âcorrole [H<sub>3</sub>(TpFPC)] as model system, weakly adsorbed on two surfaces
with different interaction strengths. We demonstrate the nondissociative
adsorption of H<sub>3</sub>(TpFPC) on pristine Au(111) and on an intermediate
organic layer that provides sufficient electronic decoupling to investigate
geometric and frontier orbital electronic properties of almost undisturbed
H<sub>3</sub>(TpFPC) molecules at the submolecular level. We identify
a deviating adsorption behavior of H<sub>3</sub>(TpFPC) compared to
structurally similar porphyrins, characterized by a chiral pair of
molecule–substrate configurations