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Surface Supported Gold-Organic Hybrids: On-Surface Synthesis and Surface Directed Orientation.
|Title||Surface Supported Gold-Organic Hybrids: On-Surface Synthesis and Surface Directed Orientation.|
|Publication Type||Journal Article|
|Year of Publication||2013|
|Authors||Zhang H, Franke J-H, Zhong D, Li Y, Timmer A, Arado OD, Mönig H, Wang H, Chi L, Wang Z, Müllen K, Fuchs H|
|Journal||Small (Weinheim an der Bergstrasse, Germany)|
|Date Published||2013 Nov 13|
The surface-assisted synthesis of gold-organic hybrids on Au (111) and Au (100) surfaces is repotred by thermally initiated dehalogenation of chloro-substituted perylene-3,4,9,10-tetracarboxylic acid bisimides (PBIs). Structures and surface-directed alignment of the Au-PBI chains are investigated by scanning tunnelling microscopy in ultra high vacuum conditions. Using dichloro-PBI as a model system, the mechanism for the formation of Au-PBI dimer is revealed with scanning tunnelling microscopy studies and density functional theory calculations. A PBI radical generated from the homolytic C-Cl bond dissociation can covalently bind a surface gold atom and partially pull it out of the surface to form stable PBI-Au hybrid species, which also gives rise to the surface-directed alignment of the Au-PBI chains on reconstructed Au (100) surfaces.