Hybridization of phenylthiolate- and methylthiolate-adatom species at low coverage on the Au(111) surface
- U.S. DOE
Using scanning tunneling microscopy we observed reaction products of two chemisorbed thiolate species, methylthiolate and phenylthiolate, on the Au(111) surface. Despite the apparent stability, organometallic complexes of methyl- and phenylthiolate with the gold-adatom (RS-Au-SR, with R as the hydrocarbon group) undergo a stoichiometric exchange reaction, forming hybridized CH{sub 3}S-Au-SPh complexes. Complementary density functional theory calculations suggest that the reaction is most likely mediated by a monothiolate RS-Au complex bonded to the gold surface, which forms a trithiolate RS-Au-(SR)-Au-SR complex as a key intermediate. This work therefore reveals the novel chemical reactivity of the low-coverage “striped” phase of alkanethiols on gold and strongly points to the involvement of monoadatom thiolate intermediates in this reaction. By extension, such intermediates may be involved in the self-assembly process itself, shedding new light on this long-standing problem.
- Research Organization:
- National Energy Technology Lab. (NETL), Pittsburgh, PA, and Morgantown, WV (United States). In-house Research; National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
- Sponsoring Organization:
- USDOE Office of Fossil Energy (FE)
- OSTI ID:
- 1127493
- Report Number(s):
- A-NETL-PUB-004
- Journal Information:
- Journal of the American Chemical Society, Vol. 135, Issue 13; ISSN 0002--7863
- Country of Publication:
- United States
- Language:
- English
Similar Records
Au-adatoms in Self-assembly of Benzenethiol on the Au(111) Surface
Diffusion of the Linear CH3S-Au-SCH3 Complex on Au(111) from First Principles