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Aggregation of Au(i)-complexes on amorphous substrates governed by aurophilicity
Johannes Kepler Univ Linz, Inst Expt Phys, Surface Sci Div, Altenberger Str 69, A-4040 Linz, Austria.
Johannes Kepler Univ Linz, Inst Expt Phys, Surface Sci Div, Altenberger Str 69, A-4040 Linz, Austria.
Phillipps Univ Marburg, Phys Dept, Mol Solids Grp, Renthof 7, D-35032 Marburg, Germany.
Phillipps Univ Marburg, Phys Dept, Mol Solids Grp, Renthof 7, D-35032 Marburg, Germany.
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2019 (English)In: Dalton Transactions, ISSN 1477-9226, E-ISSN 1477-9234, Vol. 48, no 39, p. 14712-14723Article in journal (Refereed) Published
Abstract [en]

In single crystals of 2-naphthylisonitrile-gold(i)-halide (halide = Cl, Br, I) complexes, AuMIDLINE HORIZONTAL ELLIPSISAu distances are found to be significantly shorter than twice the van der Waals radius, indicating attractive interactions between gold atoms in adjacent molecules. In the particular case of the studied 2-naphthylisonitrile-gold(i) complexes, homodimers are the common structural motifs, in which the linearly coordinated gold exhibits a crossed swords arrangement with the Au atoms of two molecules being at the intersection point. The crossed swords motif is preserved upon physical vapour deposition of both the chlorine and bromine derivatives on amorphous substrates like glass and glassy carbon. The determined activation energies of desorption for the chlorine (0.9 eV) and the bromine (1.2 eV) derivative are comparable to that of unsubstituted naphthalene. Using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and ion scattering (RBS), we confirmed the chemical integrity of the molecules in thin films and revealed the orientation of the crossed swords dimers with respect to the substrate surface.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY , 2019. Vol. 48, no 39, p. 14712-14723
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Inorganic Chemistry
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URN: urn:nbn:se:uu:diva-396704DOI: 10.1039/c9dt03049bISI: 000489155800017PubMedID: 31539005OAI: oai:DiVA.org:uu-396704DiVA, id: diva2:1368862
Funder
Swedish Research Council, 821-2012-5144Swedish Foundation for Strategic Research , RIF14-0053Available from: 2019-11-08 Created: 2019-11-08 Last updated: 2019-11-08Bibliographically approved

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