Noncontact Layer Stabilization of Azafullerene Radicals: Route toward High-Spin-Density Surfaces.

ABSTRACT: We deposit azafullerene C₅₉N^• radicals in a vacuum on the Au(111) surface for layer thicknesses between 0.35 and 2.1 monolayers (ML). The layers are characterized using X-ray photoemission (XPS) and X-ray absorption fine structure (NEXAFS) spectroscopy, low-temperature scanning tunneling microscopy (STM), and by density functional calculations (DFT). The singly unoccupied C₅₉N orbital (SUMO) has been identified in the N 1s NEXAFS/XPS spectra of C₅₉N layers as a spectroscopic fingerprint of the molecular radical state. At low molecular coverages (up to 1 ML), films of monomeric C₅₉N are stabilized with the nonbonded carbon orbital neighboring the nitrogen oriented toward the Au substrate, whereas in-plane intermolecular coupling into di

SUBMITTER: Tanuma Y 

PROVIDER: S-EPMC10753892 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature