Validation of the inverted adsorption structure for free-base tetraphenyl porphyrin on Cu(111)
P T P Ryan1, P L Lalaguna, F Haag
1Diamond Light Source, Harwell Science and Innovation Campus, Didcot, OX11 0QX, UK. david.duncan@diamond.ac.uk.
Abstract:
Utilising normal incidence X-ray standing waves we rigourously scrutinise 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 adsorption sites on the surface displaced laterally by 1.1 ± 0.2 Å in excellent agreement with previously published calculations.

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