Probing nitrosyl ligation of surface-confined metalloporphyrins by inelastic electron tunneling spectroscopy.

ABSTRACT: Complexes obtained by the ligation of nitric oxide (NO) to metalloporphyrins represent important model systems with biological relevance. Herein we report a molecular-level investigation of surface-confined cobalt tetraphenyl porphyrin (Co-TPP) species and their interaction with NO under ultrahigh vacuum conditions. It is demonstrated that individual NO adducts can be desorbed using the atomically sharp tip of a scanning tunneling microscope, whereby a writing process is implemented for fully saturated regular metalloporphyrin arrays. The low-energy vibrational characteristics of individual Co-TPP-nitrosyl complexes probed by inelastic electron tunneling spectroscopy (IETS) reveal a prominent signature at an energy of ~/=31 meV. Using density functional theory-based IETS simulations-the fi

SUBMITTER: Burema SR 

PROVIDER: S-EPMC3833350 | biostudies-literature | 2013 Jun

REPOSITORIES: biostudies-literature