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Organic Molecular Beam Deposition of Oligophenyls on Au(111): A Study by X‐ray Absorption Spectroscopy
Author(s) -
Müllegger Stefan,
Hänel Kathrin,
Strunskus Thomas,
Wöll Christof,
Winkler Adolf
Publication year - 2006
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200600353
Subject(s) - monolayer , xanes , molecule , spectroscopy , absorption (acoustics) , absorption spectroscopy , crystallography , deposition (geology) , materials science , chemistry , phase (matter) , analytical chemistry (journal) , optics , nanotechnology , organic chemistry , physics , paleontology , quantum mechanics , sediment , composite material , biology
Near‐edge X‐ray absorption fine structure (NEXAFS) spectroscopy has been applied to reveal the molecular arrangement of ultrathin oligophenyl films [ p ‐quaterphenyl (4P) and p ‐hexaphenyl (6P)] on Au(111). In the half‐monolayer films the molecules lie flat on the surface but still have a considerable inter‐ring twist of 30°‐40°, similar to the gas‐phase conformation. In the saturated monolayer film the second half of the molecules is side‐tilted by an angle of less than 66° with respect to the surface. This arrangement is already similar to that in bulk net planes of thicker films parallel to the surface, that is, the 4P(211) and 6P(21‐3) planes, respectively.