Adsorption structure of iron phthalocyanine and titanyl phthalocyanine on Cu(111)

DOI: 10.1016/j.ica.2023.121679

Authors: Matthew A. Stoodley (Diamond Light Source; University of Warwick) , Benedikt P. Klein (Diamond Light Source; University of Warwick) , Michael Clarke (University of Nottingham; University of Warwick) , Leon B. S. Williams (Diamond Light Source; University of Glasgow; University of Warwick) , Luke A. Rochford (University of Cambridge; University of Warwick) , Pilar Ferrer (Diamond Light Source; University of Warwick) , David C. Grinter (Diamond Light Source; University of Warwick) , Alex Saywell (University of Nottingham; University of Warwick) , David A. Duncan (Diamond Light Source; University of Warwick)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Inorganica Chimica Acta , VOL 21

State: Published (Approved)
Published: July 2023
Diamond Proposal Number(s): 30875 , 31165 , 29418

Abstract: The adsorption structure of iron phthalocyanine (FePc) and titanyl phthalocyanine (TiOPc) was studied by a combination of near edge X-ray absorption fine structure (NEXAFS) spectroscopy and normal incidence X-ray standing waves (NIXSW) technique. The FePc results demonstrate that the molecule adsorbs with the Fe metal centre at an adsorption height of 2.44 ± 0.09 Å, its macrocycle plane mostly parallel with the underlying surface and a single adsorption configuration. However, a small distortion of the isoindole groups, with respect to one another, is required to rationalise the results. The TiOPc results similarly indicate that the macrocycle plane is mostly parallel with the underlying surface up to thick multilayer films, yet, in the monolayer regime, the molecule must adsorb in multiple configurations. These configurations are nominally assigned to a mixture of adsorption configurations with some Ti=O bonds pointing towards the surface, and some pointing away. We determine that, in both configurations, the Ti metal centre sits at a similar adsorption height above the surface of 3.00 ± 0.20 Å.

Journal Keywords: Quantitative structure determination; X-ray standing waves; near-edge X-ray absorption fine structure; synchrotron radiation; soft X-ray photoelectron spectroscopy

Subject Areas: Materials, Chemistry


Instruments: B07-B1-Versatile Soft X-ray beamline: High Throughput ES1 , I09-Surface and Interface Structural Analysis

Added On: 14/07/2023 11:32

Documents:
1-s2.0-S0020169323003043-main.pdf

Discipline Tags:

Surfaces Physics Physical Chemistry Chemistry Materials Science Inorganic Chemistry

Technical Tags:

Diffraction Spectroscopy X-ray Standing Wave (XSW) X-ray Absorption Spectroscopy (XAS) X-ray Photoelectron Spectroscopy (XPS) Near Edge X-ray Absorption Fine Structures (NEXAFS)