Toward mechanical switching of surface-adsorbed [2]catenane by in situ copper complexation.
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.
Payer
Dietmar
D
Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany.
Rauschenbach
Stephan
S
Malinowski
Nicola
N
Konuma
Mitsuharu
M
Virojanadara
Chariya
C
Starke
Ulrich
U
Dietrich-Buchecker
Christiane
C
Collin
Jean-Paul
JP
Sauvage
Jean-Pierre
JP
Lin
Nian
N
Kern
Klaus
K
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
D000873:Anthracenes; D008024:Ligands; D011083:Polycyclic Compounds; C467767:catenane; D003300:Copper