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BOND STRETCHING AND DISTORTION IN LARGE ORGANIC MOLECULES ON Ag(111) DETERMINED BY SURFACE X-RAY DIFFRACTION

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  • H. L. MEYERHEIM

    (Institut für Kristallographic & Angewandte Minerlogie, Universität München, Theresienstraße 41, D-80333 München, Germany)

  • TH. GLOEGE

    (Institut für Kristallographic & Angewandte Minerlogie, Universität München, Theresienstraße 41, D-80333 München, Germany)

  • H. MALTOR

    (Institut für Kristallographic & Angewandte Minerlogie, Universität München, Theresienstraße 41, D-80333 München, Germany)

  • M. SOKOLOWSKI

    (Experimentelle Physik II, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany)

  • E. UMBACH

    (Experimentelle Physik II, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany)

  • P. BÄUERLE

    (Abteilung Organische Chemie II, Universität Ulm, Albert-Einstein-Allee 11, D-89081 Ulm, Germany)

Abstract

The geometric structure of large organic molecules (end-capped quaterthiophene and 2-thiouracil) adsorbed on Ag(111) was analyzed in detail by surface X-ray diffraction. In both cases our data give direct evidence for significant stretching of the C–S and the C–C bonds by up to 0.16 Å and — in the case of EC4T — for a distortion of the thiophene rings. This is in contrast to the common belief that such molecules remain undistorted upon adsorption on a weakly interacting substrate. Our results provide the basis for a deeper understanding of large organic adsorbates and have important implications for a deeper insight into organic/inorganic interfaces in general.

Suggested Citation

  • H. L. Meyerheim & Th. Gloege & H. Maltor & M. Sokolowski & E. Umbach & P. Bäuerle, 1999. "BOND STRETCHING AND DISTORTION IN LARGE ORGANIC MOLECULES ON Ag(111) DETERMINED BY SURFACE X-RAY DIFFRACTION," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 6(05), pages 883-891.
    • Handle: RePEc:wsi:srlxxx:v:06:y:1999:i:05:n:s0218625x99000949
    DOI: 10.1142/S0218625X99000949
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