Incorporation of tris(2,2′-bipyridine)ruthenium(II) cations ([Ru(bpy)3]2+) into a mesoporous silica

✍ Scribed by Makoto Ogawa; Tomoyuki Nakamura; Jun-Ichi Mori; Kazuyuki Kuroda

• Book ID: 104430488
• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 110 KB
• Volume: 48
• Category: Article
• ISSN: 1387-1811
• DOI: 10.1016/s1387-1811(01)00339-0

✦ Synopsis

The luminescence characteristics of tris(2,2 H -bipyridine)ruthenium(II) Rubpy 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 Rubpy 3 2 chloride hexahydrate. The amount of adsorbed Rubpy 3 2 was controlled by changing the concentration of the solution. When the samples were dehydrated, the adsorbed Rubpy 3 2 ions aggregated to cause self-quenching of the luminescence. The luminescence was intensi®ed dramatically upon hydration of the samples, indicating that the aggregated Rubpy 3 2 ions were dispersed in the mesopore to suppress the self-quenching. The luminescence characteristics of the adsorbed Rubpy 3 2 signi®cantly changed upon washing, showing the possible role of the co-adsorbed Cl À ions.