The luminescence properties of solid [Tb⊂bpy·bpy·bpy]3+, [La⊂bpy·bpy·bpy]3+, and [Na⊂bpy·bpy·bpy]+ are reported for temperatures down to 4.2 K. The 2,2′-bipyridine phosphorescence in the case of the La3+ and Na+ cryptate is quenched by energy migration to killers. In the case of Tb3+, however, efficient energy transfer from the cryptand to Tb3+ takes place up till 100 K. At that temperature migration competes with energy transfer to Tb3+, reducing the Tb3+ luminescence output. The rates of the processes involved are determined as accurately as possible. A comparison is made with the same cryptate molecules in solution. © 1988 American Chemical Society.
Luminescence processes in [Tb⊂bpy·bpy·bpy]3+ cryptate: A low-temperature solid-state study
Perathoner, S.;
1988-01-01
Abstract
The luminescence properties of solid [Tb⊂bpy·bpy·bpy]3+, [La⊂bpy·bpy·bpy]3+, and [Na⊂bpy·bpy·bpy]+ are reported for temperatures down to 4.2 K. The 2,2′-bipyridine phosphorescence in the case of the La3+ and Na+ cryptate is quenched by energy migration to killers. In the case of Tb3+, however, efficient energy transfer from the cryptand to Tb3+ takes place up till 100 K. At that temperature migration competes with energy transfer to Tb3+, reducing the Tb3+ luminescence output. The rates of the processes involved are determined as accurately as possible. A comparison is made with the same cryptate molecules in solution. © 1988 American Chemical Society.Pubblicazioni consigliate
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