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Structural transformation of surface-confined porphyrin networks by addition of Co atoms

DOI: 10.1002/chem.202101217 DOI Help

Authors: Brian David Baker Cortés (University of Groningen Zernike Institute for Advanced Materials) , Mihaela Enache (University of Groningen Zernike Institute for Advanced Materials) , Kathrin Küster (Max-Planck-Institute for Solid State Research) , Florian Studener (University of Groningen Zernike Institute for Advanced Materials) , Tien-Lin Lee (Diamond Light Source) , Nicolas Marets (Laboratoire de Tectonique Moléculaire du Solide) , Véronique Bulach (Laboratoire de Tectonique Moléculaire du Solide) , Mir Wais Hosseini (Laboratoire de Tectonique Moléculaire du Solide) , Meike Stohr (University of Groningen Zernike Institute for Advanced Materials)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Chemistry – A European Journal

State: Published (Approved)
Published: June 2021
Diamond Proposal Number(s): 11841

Abstract: The self-assembly of a nickel-porphyrin derivative (Ni-DPPyP) containing two pyridyl coordinating sites and two pentyl chains at trans meso positions was studied with scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS) and low energy electron diffraction (LEED) on Au(111). Deposition of Ni-DPPyP onto Au(111) gave rise to a close-packed network for coverages smaller or equal to one monolayer as revealed by STM and LEED. The molecular arrangement of this two-dimensional network is stabilized via hydrogen bonds formed between the pyridyl’s nitrogen and hydrogen atoms from the pyrrole groups of neighboring molecules. Subsequent deposition of cobalt atoms onto the close-packed network and post-deposition annealing at 423 K led to the formation of a Co-coordinated hexagonal porous network. As confirmed by XPS measurements, the porous network is stabilized by metal-ligand interactions between one cobalt atom and three pyridyl ligands, each pyridyl ligand coming from a different Ni-DPPyP molecule.

Journal Keywords: metal-organic coordination network; molecular self-assembly; scanning tunneling microscopy; X-ray photoelectron spectroscopy

Subject Areas: Chemistry

Instruments: I09-Surface and Interface Structural Analysis

Added On: 23/06/2021 10:03

Discipline Tags:

Inorganic Chemistry Physics Surfaces Chemistry

Technical Tags:

Spectroscopy X-ray Photoelectron Spectroscopy (XPS)