Abstract
Abstract In a crystal of double complex salt Na[Ru(bpy)3][Cr(ox)3] (bpy = 2,2′-bipyridine, ox2− = C2O42−) obtained by mixing aqueous solutions of Na3[Cr(ox)3]•5H2O and [Ru(bpy)3]Cl2•6H2O, both luminescence from 3CT (metal-to-ligand charge-transfer) state of [Ru(bpy)3]2+ and 2Eg state of [Cr(ox)3]3− could be observed at 77 K, although the luminescence from 3CT was extremely small. Lifetime of the luminescence from 3CT becomes far shorter than that of single complex salts [Ru(bpy)3]X•nH2O (X = 2Cl−, SO42−). The large lifetime reduction of 3CT state indicates that the excitation energy transfer occurs via 3CT state of [Ru(bpy)3]2+ moiety in the double complex salt.
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