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Toward Mechanical Switching of Surface-Adsorbed [2]Catenane by in Situ Copper Complexation
Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany.
Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany.
Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany.
Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany.
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2007 (English)In: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 129, 15662-15667 p.Article in journal (Refereed) Published
Abstract [en]

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 π−π 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. 

Place, publisher, year, edition, pages
Washington, DC, USA: American Chemical Society (ACS), 2007. Vol. 129, 15662-15667 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-78523DOI: 10.1021/ja075886mOAI: oai:DiVA.org:liu-78523DiVA: diva2:533709
Available from: 2012-06-14 Created: 2012-06-14 Last updated: 2017-12-07

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Virojanadara, Chariya

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