Coverage- and Temperature-Dependent Rates of Metalation, Ring Fusion, and Polymerization of Benzoporphyrins on Cu(111).

ABSTRACT: Using scanning-tunneling microscopy (STM), temperature-programmed desorption (TPD), X-ray photoelectron spectroscopy (XPS), and density-functional theory (DFT), we have investigated metalation, ring fusion, and polymerization of three different benzoporphyrins, tetraphenyltransdisbenzoporphyrin (2-Benzo), copper-tetraphenyltransdibenzoporphyrin (Cu 2-Benzo), and tetraphenyltetrabenzoporphyrin (4-Benzo), from 280 to 1000 K on Cu(111), and compare with previous data of tetraphenylporphyrin (0-Benzo) on Cu(111). Using STM, we observe 2-Benzo to adsorb as individual, rather-immobile molecules at room temperature, which coalesce into elongated islands of metalated molecules at 373 K. N 1 s XPS spectra confirm the metalation, and DFT-calculated structures and simulated STM images confirm the app

SUBMITTER: Muth M 

PROVIDER: S-EPMC12272011 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature