Structure Determination of F 4 TCNQ on Ag(111): A Systematic Trend in Metal Adatom Incorporation

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

doi:10.1021/acsomega.4c04860

Structure Determination of F 4 TCNQ on Ag(111): A Systematic Trend in Metal Adatom Incorporation

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

^*Corresponding author for this work

Chemistry

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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.

Original language	English
Pages (from-to)	32193-32200
Number of pages	8
Journal	ACS Omega
Volume	9
Issue number	29
DOIs	https://doi.org/10.1021/acsomega.4c04860
Publication status	Published - 10 Jul 2024

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Cite this

@article{1b2ae0d72b784d4bb54bb5fdb5fc0fdd,

title = "Structure Determination of F 4 TCNQ on Ag(111): A Systematic Trend in Metal Adatom Incorporation",

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 {\AA}. The results show a consistent pattern of behavior for F4TCNQ adsorption on the (111) surfaces of Cu, Ag, and Au.",

author = "Hobson, {Archie L.} and Hadeel Hussain and Mousley, {Philip J.} and Duncan, {David A.} and Mona Braim and Giovanni Costantini and Christopher Nicklin and Woodruff, {D. Phil}",

year = "2024",

month = jul,

day = "10",

doi = "10.1021/acsomega.4c04860",

language = "English",

volume = "9",

pages = "32193--32200",

journal = "ACS Omega",

issn = "2470-1343",

publisher = "American Chemical Society",

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}

TY - JOUR

T1 - Structure Determination of F 4 TCNQ on Ag(111)

T2 - A Systematic Trend in Metal Adatom Incorporation

AU - Hobson, Archie L.

AU - Hussain, Hadeel

AU - Mousley, Philip J.

AU - Duncan, David A.

AU - Braim, Mona

AU - Costantini, Giovanni

AU - Nicklin, Christopher

AU - Woodruff, D. Phil

PY - 2024/7/10

Y1 - 2024/7/10

N2 - 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.

AB - 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.

U2 - 10.1021/acsomega.4c04860

DO - 10.1021/acsomega.4c04860

M3 - Article

SN - 2470-1343

VL - 9

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EP - 32200

JO - ACS Omega

JF - ACS Omega

IS - 29

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