Monolayer Properties of a Dipyridyl Coordinated Ruthenium Compound

Abstract

Abstract A ligand exchange of trichloro-2,2′-dipyridylstearylamine ruthenium(III) (Ru(dps)Cl3) monolayer was investigated at the air-water interface and in the LB film. The optical image of the monolayer was monitored by Brewster angle microscopy. When the monolayer was spread on alkaline subphase (pH 11), the surface pressure spontaneously increased up to 15 mN/m. The λmax around 550 nm of UV-Vis absorption spectra of Ru(dps)Cl3 in chloroform was shifted to around 670 nm in the LB film. The FT-IR spectra of the LB films also supported the two-dimensional ligand exchange of chloride to water or hydroxide ions.