SurfaceScience21 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 103: Poster Session VIII: Surface reactions II
O 103.4: Poster
Donnerstag, 4. März 2021, 13:30–15:30, P
Investigating the mechanism underlying an order-disorder transition for molecular assemblies of tetraphenylporphyrin (TPP) on Au(111) — •Matthew Edmondson1, Eleanor Frampton1,2, Chris J. Judd1, Neil R. Champness2, David A. Duncan3, Robert Jones2, and Alex Saywell1 — 1School of Physics & Astronomy, University of Nottingham — 2School of Chemistry, University of Nottingham, Nottingham, UK — 3Diamond Light Source, Harwell Science and Innovation Campus, Didcot, UK
Porphyrins display a rich array of chemical and physical properties which can be tuned by incorporating a metal atom via solution-phase synthesis or on-surface protocols.[1] Self-metalation (uptake of metal atoms from a supporting substrate) has been observed for surface confined porphyrin species, such as for 2H-tetraphenylporphyrin (2H-TPP) on Cu(111),[2] and offers an alternate synthetic pathway for the formation of metalated TPP (M-TPP) which is driven by interaction with the substrate.
Here we report on the interaction between 2H-TPP and Au(111) and present details of an order-disorder transition of 2H-TPP assemblies. Chemical analysis via X-ray photoelectron spectroscopy (XPS) suggests the formation of an Au-TPP species as part of this process. Characterisation using a combination of scanning probe microscopy, XPS, and X-ray standing wave techniques provide both chemical and structural information on the evolution of this on-surface reaction.
[1] J. M. Gottfried, Surface Science Reports, 2015, 70, 259-379.
[2] K. Diller et al., Journal of Chemical Physics, 2012, 136, 14705.