title: Two-Dimensional Ketone-Driven Metal-Organic Coordination on Cu(111).
abstract: Two-dimensional metal-organic nanostructures based on the binding of ketone groups and metal atoms were fabricated by depositing pyrene-4,5,9,10-tetraone (PTO) molecules on a Cu(111) surface. The strongly electronegative ketone moieties bind to either copper adatoms from the substrate or codeposited iron atoms. In the former case, scanning tunnelling microscopy images reveal the development of an extended metal-organic supramolecular structure. Each copper adatom coordinates to two ketone ligands of two neighbouring PTO molecules, forming chains that are linked together into large islands through secondary van der Waals interactions. Deposition of iron atoms leads to a transformation of this assembly resulting from the substitution of the metal centres. Density functional theory calculations reveal that the driving force for the metal substitution is primarily determined by the strength of the ketone-metal bond, which is higher for Fe than for Cu. This second class of nanostructures displays a structural dependence on the rate of iron deposition.
authors.affiliation: Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK.
authors.forename: Ada
authors.initials: A
authors.lastname: Della Pia
authors.affiliation: Department of Physics, King's College London, Strand, London, WC2R 2LS, UK.
authors.forename: Massimo
authors.initials: M
authors.lastname: Riello
authors.affiliation: Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK.
authors.forename: James
authors.initials: J
authors.lastname: Lawrence
authors.affiliation: Namur Research College (NARC) and Department of Chemistry, University of Namur (UNamur), 5000, Belgium.
authors.forename: Daphne
authors.initials: D
authors.lastname: Stassen
authors.affiliation: Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK.
authors.forename: Tim S
authors.initials: TS
authors.lastname: Jones
authors.affiliation: Namur Research College (NARC) and Department of Chemistry, University of Namur (UNamur), 5000, Belgium. bonifazid@cardiff.ac.uk.|School of Chemistry, Cardiff University, Park Place, CF10 3AT, Cardiff, UK. bonifazid@cardiff.ac.uk.
authors.forename: Davide
authors.initials: D
authors.lastname: Bonifazi
authors.affiliation: Department of Physics, King's College London, Strand, London, WC2R 2LS, UK. alessandro.de_vita@kcl.ac.uk.
authors.forename: Alessandro
authors.initials: A
authors.lastname: De Vita
authors.affiliation: Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK. G.Costantini@warwick.ac.uk.
authors.forename: Giovanni
authors.initials: G
authors.lastname: Costantini
keywords: density functional theory; nanostructures; scanning tunneling microscopy; self-assembly; surface chemistry