Conformational Control of Chemical Reactivity for Surface-Confined Ru-Porphyrins

Peter Knecht, Joachim Reichert, Peter S. Deimel, Peter Feulner, Felix Haag, Francesco Allegretti, Manuela Garnica, Martin Schwarz, Willi Auwärter, Paul T.P. Ryan, Tien Lin Lee, David A. Duncan, Ari Paavo Seitsonen, Johannes V. Barth, Anthoula C. Papageorgiou

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

We assess the crucial role of tetrapyrrole flexibility in the CO ligation to distinct Ru-porphyrins supported on an atomistically well-defined Ag(111) substrate. Our systematic real-space visualisation and manipulation experiments with scanning tunnelling microscopy directly probe the ligation, while bond-resolving atomic force microscopy and X-ray standing-wave measurements characterise the geometry, X-ray and ultraviolet photoelectron spectroscopy the electronic structure, and temperature-programmed desorption the binding strength. Density-functional-theory calculations provide additional insight into the functional interface. We unambiguously demonstrate that the substituents regulate the interfacial conformational adaptability, either promoting or obstructing the uptake of axial CO adducts.

Original languageEnglish
Pages (from-to)16561-16567
Number of pages7
JournalAngewandte Chemie International Edition in English
Volume60
Issue number30
DOIs
StatePublished - 19 Jul 2021

Keywords

  • CO ligands
  • X-ray spectroscopy
  • ab-initio calculations
  • metalloporphyrins
  • scanning probe microscopy

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