期刊
SMALL
卷 10, 期 7, 页码 1361-1368出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201303011
关键词
Ullmann reaction; scanning tunnelling microscopy; organogold; polymerization; surface reaction
类别
资金
- DFG through the German-Chinese transregional project [TRR61, SFB858]
- NSFC through the German-Chinese transregional project [TRR61, SFB858]
- NSFC [91227201]
- China Scholarship Council (CSC)
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.
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