Adsorption Conformation and Lateral Registry of Cobalt Porphine on Cu(111)

Martin Schwarz, Manuela Garnica, David A. Duncan, Alejandro Pérez Paz, Jacob Ducke, Peter S. Deimel, Pardeep K. Thakur, Tien Lin Lee, Angel Rubio, Johannes V. Barth, Francesco Allegretti, Willi Auwärter

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

The tetrapyrrole macrocycle of porphine is the common core of all porphyrin molecules, an interesting class of π-conjugated molecules with relevance in natural and artificial systems. The functionality of porphines on a solid surface can be tailored by the central metal atom and its interaction with the substrate. In this study, we present a local adsorption geometry determination for cobalt porphine on Cu(111) by means of complementary scanning tunneling microscopy, high-resolution X-ray photoelectron spectroscopy, X-ray standing wave measurements, and density functional theory calculations. Specifically, the Co center was determined to be at an adsorption height of 2.25 ± 0.04 Å occupying a bridge site. The macrocycle adopts a moderate asymmetric saddle-shape conformation, with the two pyrrole groups that are aligned perpendicular to the densely packed direction of the Cu(111) surface tilted away from the surface plane.

Original languageEnglish
Pages (from-to)5452-5461
Number of pages10
JournalJournal of Physical Chemistry C
Volume122
Issue number10
DOIs
Publication statusPublished - Mar 15 2018
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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