Adsorption-induced distortion of a large pi-conjugated molecule studied bysurface X-ray diffraction: End-capped quaterthiophene on Ag(111)

Citation
Hl. Meyerheim et al., Adsorption-induced distortion of a large pi-conjugated molecule studied bysurface X-ray diffraction: End-capped quaterthiophene on Ag(111), EUROPH LETT, 52(2), 2000, pp. 144-150
Citations number
26
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
EUROPHYSICS LETTERS
ISSN journal
0295-5075 → ACNP
Volume
52
Issue
2
Year of publication
2000
Pages
144 - 150
Database
ISI
SICI code
0295-5075(200010)52:2<144:ADOALP>2.0.ZU;2-F
Abstract
The internal geometric structure of a large pi -conjugated organic molecule adsorbed on a metallic surface (end-capped quaterthiophene on Ag(111)) was determined in detail by using surface X-ray diffraction. In contrast to th e common belief that such molecules remain undistorted on a weakly interact ing substrate, we find significant distortion of the thiophene rings and el ongation of the bond distances. These results open new perspectives for the understanding of large organic adsorbates and have important implications for a deeper insight into organic/inorganic interfaces in general.