title: Ultrathin ruthenium(II) complex-H4SiW12O40 multilayer film.
abstract: A dipolar Ru(II) complex, [(bpy)2Ru(bpbh)Ru(bpy)2](ClO4)4 {where bpbh = 1,6-bis-[2-(2-pyridyl) benzimidazoyl]hexane, bpy = 2,2'-bipyridine}, was synthesized and characterized. A multilayer film of at least 18 layers was successfully prepared by alternating adsorption of H4SiW12O40 and [Ru2(bpy)4(bpbh)](ClO4)4 by electrostatic layer-by-layer self-assembly. The multilayer films were studied by ultraviolet-visible and X-ray photoelectron spectroscopy, atomic force microscopy, and cyclic voltammetry.
authors.affiliation: Department of Chemistry, Beijing Normal University, Beijing 100875, China.
authors.forename: Yu-Qi
authors.initials: YQ
authors.lastname: Zhang
authors.forename: Li-Hua
authors.initials: LH
authors.lastname: Gao
authors.forename: Ke-Zhi
authors.initials: KZ
authors.lastname: Wang
authors.forename: Hong-Jun
authors.initials: HJ
authors.lastname: Gao
authors.forename: Ye-Liang
authors.initials: YL
authors.lastname: Wang