Luminescence processes in [Tb.cntnd.bpy.bpy.bpy]3+ cryptate: a low-temperature solid-state study

Blasse, G.; Dirksen, G. J.; Sabbatini, N.; Perathoner, Siglinda; Lehn, J. M.; Alpha, B.

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The luminescence properties of solid [Tb.cntnd.bpy.bpy.bpy]3+, [La.cntnd.bpy.bpy.bpy]3+, and [Na.cntnd.bpy.bpy.bpy]+ are reported for temps. 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 temp. migration competes with energy transfer to Tb3+, reducing the Tb3+ luminescence output. The rates of the processes involved are detd. as accurately as possible. A comparison is made with the same cryptate mols. in soln. [on SciFinder(R)]

Titolo:	Luminescence processes in [Tb.cntnd.bpy.bpy.bpy]3+ cryptate: a low-temperature solid-state study
Autori:	G. Blasse G. J. Dirksen N. Sabbatini PERATHONER, Siglinda J. M. Lehn B. Alpha mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	1988
Rivista:	THE JOURNAL OF PHYSICAL CHEMISTRY
Abstract:	The luminescence properties of solid [Tb.cntnd.bpy.bpy.bpy]3+, [La.cntnd.bpy.bpy.bpy]3+, and [Na.cntnd.bpy.bpy.bpy]+ are reported for temps. 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 temp. migration competes with energy transfer to Tb3+, reducing the Tb3+ luminescence output. The rates of the processes involved are detd. as accurately as possible. A comparison is made with the same cryptate mols. in soln. [on SciFinder(R)]
Handle:	http://hdl.handle.net/11570/1907354
Appare nelle tipologie:	14.a.1 Articolo su rivista

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