[Ru （bpy）3]2+/MCM-41 composite material obtained by loading tris（2, 2’ - bipyridine）ruthenium（Ⅱ） ([Ru （bpy）3]2+ ) in siliceous mesoporous MCM-41 was characterized by X-ray powder diffraction, UV-Vis absorption and emission spectroscopies. The absorption spectrum of [Ru（bpy）3]2+ /MCM-41 is similar to that of [Ru （bpy）3]2+ aqueous solution, whereas its emission spectrum exhibits hypsochromic shift compared to the solution spectrum. On the other hand, the peak position of the emission spectrum of [Ru（bpy）3]2+/MCM-41 shifts towards longer wavelength when the loading amount increases.
