The luminescence characteristics of tris(2.2'-bipyridine)ruthenium(II) ([Ru(bpy)3]2+) adsorbed on a mesoporous silica was investigated. The adsorption of the complex cation into the mesoporous silica was conducted by the reaction using a dimethylformamide solution of [Ru(bpy)3]2+ chloride hexahydrate. The amount of adsorbed [Ru(bpy)3]2+ was controlled by changing the concentration of the solution. When the samples were dehydrated, the adsorbed [Ru(bpy)3]2+ ions aggregated to cause self-quenching of the luminescence. The luminescence was intensified dramatically upon hydration of the samples, indicating that the aggregated [Ru(bpy)3]2+ ions were dispersed in the mesopore to suppress the self-quenching. The luminiscence characteristics of the adsorbed [Ru(bpy)3]2+ significantly changed upon washing, showing the possible role of the co-adsorbed Cl- ions.
ASJC Scopus subject areas
- 化学 (全般)