Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 140, Issue 14, Pages 4820-4825Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.7b09097
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Funding
- National Natural Science Foundation of China (NSFC) [21527805, 21673154, 11374374, 21790053]
- Ministry of Science and Technology [2017YFA0205002]
- Johannes Gutenberg University
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Surface-assisted polymerization of alkanes is a remarkable reaction for which the surface reconstruction of Au(110) is crucial. The surface of (1x2)-Au(110) precovered with molecules can be completely transformed into (1x3)-Au(110) by introducing branched methylidene groups on both sides of the aliphatic chain (18, 19-dimethylidenehexatriacontane) or locally shifted into (1x3)-Au(110) under exposure to low-energy electrons (beam energy from 3.5 to 33.6 eV, for alkane dotriacontane). Scanning tunneling microscopy investigations demonstrate that alkane chains adsorbed on (1x3)Au(110) are more reactive than on (1x2)-Au(110), presenting a solid experimental proof for structure reactivity relationships. This difference can be ascribed to the existence of an extra row of gold atoms in the groove of (1x3)-Au(110), providing active sites of Au atoms with lower coordination number. The experimental results are further confirmed by density functional theory simulations.
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