Geometry for self-assembling of spherical hydrocarbon cages with methane thiolates on au(111)

Shintaro Fujii; Uichi Akiba; Masamichi Fujihira

doi:10.1021/ja026214t

Geometry for self-assembling of spherical hydrocarbon cages with methane thiolates on au(111)

J Am Chem Soc. 2002 Nov 13;124(45):13629-35. doi: 10.1021/ja026214t.

Authors

Shintaro Fujii¹, Uichi Akiba, Masamichi Fujihira

Affiliation

¹ Contribution from the Department of Biomolecular Engineering, Tokyo Institute of Technology, 4259 Nagatsuta Midori-ku, Yokohama, 226-8501, Japan.

PMID: 12418918
DOI: 10.1021/ja026214t

Abstract

An organodisulfide with a pair of adamantane moieties was synthesized, and its self-assembled monolayer (SAM) was formed on Au(111). The adamantane moieties are almost spherical and much bulkier than alkyl chains. The structure was characterized by scanning tunneling microscopy. Two-dimensional crystals of the SAM were found to be four orientationally different hexagonals with almost the same lattice constant with 4 radical 3a/3 and 7a/3 (a = 0.2884 nm, the Au lattice constant). The structure is assigned to four of the high-order commensurate adlayers. The present study of geometry and energetics for self-assembling of such an organosulfur compound with spherical cages provides a new insight into the probable SAM structure of various thiolate derivatives on Au(111).