title: Toward mechanical switching of surface-adsorbed [2]catenane by in situ copper complexation.
abstract: Using scanning tunneling microscopy (STM), electrospray ionization mass spectrometry (ESI-MS), and X-ray photoelectron spectroscopy (XPS), we demonstrate that a free [2]catenane consisting of two interlocking 30-membered rings (cat-30) can be deposited on a Ag(111) surface by vacuum sublimation without decomposition. The deposited cat-30 molecules self-organize as ordered dimer chain structures at the surface, presumably via intermolecular pi-pi stacking. An in situ addition of Cu atoms to the surface-adsorbed catenanes induces a drastic change in the molecular organization, i.e., from the dimer chain structure to isolated species. The nitrogen core level spectra suggest that the cat-30 phenanthroline units coordinate with Cu, indicating that the free catenane has been transformed into a Cu-complexed [2]catenane. Since it is known that the two interlocked macrocyclic rings of the free ligand cat-30 completely rearrange, i.e., circumrotate, upon complexation to copper, our results reveal that when adsorbed on the silver surface, the two macrocyclic rings of the free [2]catenane can glide within one another so as to generate the corresponding copper complex by in situ Cu complexation.
authors.affiliation: Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany.
authors.forename: Dietmar
authors.initials: D
authors.lastname: Payer
authors.forename: Stephan
authors.initials: S
authors.lastname: Rauschenbach
authors.forename: Nicola
authors.initials: N
authors.lastname: Malinowski
authors.forename: Mitsuharu
authors.initials: M
authors.lastname: Konuma
authors.forename: Chariya
authors.initials: C
authors.lastname: Virojanadara
authors.forename: Ulrich
authors.initials: U
authors.lastname: Starke
authors.forename: Christiane
authors.initials: C
authors.lastname: Dietrich-Buchecker
authors.forename: Jean-Paul
authors.initials: JP
authors.lastname: Collin
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Sauvage
authors.forename: Nian
authors.initials: N
authors.lastname: Lin
authors.forename: Klaus
authors.initials: K
authors.lastname: Kern
mesh_terms: D000327:Adsorption; D000873:Anthracenes / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D008024:Ligands; D016252:Microscopy, Scanning Tunneling; D015394:Molecular Structure; D011083:Polycyclic Compounds / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization; D013499:Surface Properties
chemical_list: D000873:Anthracenes; D008024:Ligands; D011083:Polycyclic Compounds; C467767:catenane; D003300:Copper