SurfaceScience21 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 6: Poster Session I: Organic molecules on inorganic substrates: Adsorption and growth I

O 6.8: Poster

Montag, 1. März 2021, 10:30–12:30, P

Validation of the inverted adsorption structure for free-base tetraphenyl porphyrin on Cu(111) — Paul TP Ryan^1,2, Paula Laborda Lalaguna^1,3, Felix Haag⁴, Mona M Braim⁵, Pencheng Ding^5,6, David J Payne², Johannes V Barth⁴, Tien-Lin Lee¹, D Phil Woodruff⁵, Francesco Allegretti⁴, and •David A Duncan¹ — ¹Diamond Light Source, Didcot, UK — ²Imperial College London, UK — ³University of Glasgow, UK — ⁴Technical University of Munich, Germany — ⁵University of Warwick, Coventry, UK — ⁶Harbin Institute of Technology, China

Utilising normal incidence X-ray standing waves we rigourosly scrutinised the "inverted model" as the adsorption structure of free-base tetraphenyl porphyrin on Cu(111). We demonstrate that the iminic N atoms are anchored at near-bridge sites on the surface, displaced laterally by 1.1*0.2Å in excellent agreement with previously published calculations, thus confirming that this unusual structure is indeed present on the surface.