Investigation of the formation process of nanosized particles of Ru(III)

17O, 35Cl, 133Cs NMR spectroscopy, static magnetic susceptibility measurements, EXAFS, UV spectroscopy, pH measurements, and electron microscopy are applied to investigate alkaline hydrolysis of aqueous K2[RuCl5H2O]. It is found that on addition of a base ligand substitution is accompanied by polycondensation processes which afford filament structures consisting of Ru(OH)4Cl2 octahedra bonded by single OH-bridges. When polynuclear compounds are sorbed on the surface of carbonic substrates, the filaments aggregate into nanosized particles which have a diameter of approximately 2.0 nm with a narrow size distribution.