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Published on: March 4, 2021
Surface supported gold-organic hybrids: on-surface synthesis and surface directed orientation
Haiming Zhang1, Jörn-Holger Franke, Dingyong Zhong
1Physikalisches Institut, Universität Münster, Wilhelm-Klemmstrasse 10, 48149 Münster, Germany, Center for Nanotechnology (CeNTech), Heisenbergstrasse 11, 48149, Münster, Germany.
Abstract:
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.
