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Imaging the Bonds of Dehalogenated Benzene Radicals on Cu(111) and Au(111)
Author(s) -
SimicMilosevic Violeta,
Mehlhorn Michael,
Morgenstern Karina
Publication year - 2016
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.201600495
Subject(s) - chemistry , radical , molecule , photochemistry , hydrogen bond , benzene , adsorption , hydrogen , hydrogen atom , crystallography , inorganic chemistry , organic chemistry , alkyl
Abstract Dissociative adsorption of doubly substituted benzene molecules leads to formation of benzyne radicals. In this study, co‐adsorbed hydrogen molecules are used in scanning tunneling hydrogen microscopy to enhance the contrast of the meta‐ and the para ‐isomers of these radicals on Cu(111) and Au(111). Up to three hydrogen molecules are attached to one radical. One hydrogen molecule reveals the orientation of the carbon ring and its adsorption site, allowing discrimination between the two radicals. Two hydrogen molecules reflect the bond picture of the carbon skeleton and reveals that adsorption on Cu(111) distorts the meta‐ isomer differently from its gas‐phase distortion. Three hydrogen molecules allow us to determine the bond picture of a minor species.