Structure Determination of F4TCNQ on Ag(111): A Systematic Trend in Metal Adatom Incorporation

Hobson, Archie L.; Hussain, Hadeel; Mousley, Philip J.; Duncan, David A.; Braim, Mona; Costantini, Giovanni; Nicklin, Christopher; Woodruff, D. Phil

Abstract

A structure determination of the commensurate phase formed by 7,7,8,8-tetracyano-2,3,5,6-tetrafluoroquinodimethane (F4TCNQ) absorbed on Ag(111) is reported. Initial characterization was performed using low-energy electron diffraction and synchrotron radiation photoelectron spectroscopy, with quantitative structural data being provided by normal incident X-ray standing waves (NIXSW) and surface X-ray diffraction (SXRD). NIXSW data show the F4TCNQ molecule to adopt a “twisted” conformation on the surface, previously found to be associated with metal adatom incorporation into a 2d-metal–organic framework for F4TCNQ on Au(111), Ag(100), and Cu(111). SXRD results provide direct evidence of the presence of Ag adatoms that are found to occupy near-bridge or fcc hollow sites with respect to the underlying surface, at an adsorption height of 2.69 ± 0.10 Å. The results show a consistent pattern of behavior for F4TCNQ adsorption on the (111) surfaces of Cu, Ag, and Au.

Citation

Hobson, A. L., Hussain, H., Mousley, P. J., Duncan, D. A., Braim, M., Costantini, G., Nicklin, C., & Woodruff, D. P. (2024). Structure Determination of F4TCNQ on Ag(111): A Systematic Trend in Metal Adatom Incorporation. ACS Omega, 9(29), 32193-32200. https://doi.org/10.1021/acsomega.4c04860

• Journal Article Type: Article
• Acceptance Date: Jul 5, 2024
• Online Publication Date: Jul 10, 2024
• Publication Date: Jul 23, 2024
• Deposit Date: Nov 18, 2024
• Publicly Available Date: Nov 19, 2024
• Journal: ACS Omega
• Electronic ISSN: 2470-1343
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 9
• Issue: 29
• Pages: 32193-32200
• DOI: https://doi.org/10.1021/acsomega.4c04860
• Public URL: https://nottingham-repository.worktribe.com/output/41932688
• Publisher URL: https://pubs.acs.org/doi/10.1021/acsomega.4c04860