The absorption, emission, and excitation spectra, the excited state lifetimes (at 77 and 300 K, in H2O and D2O soln.) and the emission quantum yields of some Eu3+ and Tb3+ cryptates are reported and compared with the corresponding properties of the Eu3+ and Tb3+ aquo ions. The cryptates examd. are [M.cntnd.2.2.1]3+, [M.cntnd.2.2.1]3+-2F-, and [M.cntnd.bpy.bpy.bpy]3+, where M stands for Eu3+ or Tb3+, 2.2.1 is the 4,7,13,16,21-pentaoxa-1,10-diazabicyclo-8,8,5-tricosane cryptand, and bpy.bpy.bpy is a macrobicyclic cryptand contg. three 2,2'-bipyridine groups. The possibility to design complexes exhibiting excellent absorption and luminescence properties is discussed on the basis of a detailed anal. of the above mentioned photophys. data. [on SciFinder(R)]
Antenna effect in europium(3+) and terbium(3+) cryptates
PERATHONER, Siglinda;
1987-01-01
Abstract
The absorption, emission, and excitation spectra, the excited state lifetimes (at 77 and 300 K, in H2O and D2O soln.) and the emission quantum yields of some Eu3+ and Tb3+ cryptates are reported and compared with the corresponding properties of the Eu3+ and Tb3+ aquo ions. The cryptates examd. are [M.cntnd.2.2.1]3+, [M.cntnd.2.2.1]3+-2F-, and [M.cntnd.bpy.bpy.bpy]3+, where M stands for Eu3+ or Tb3+, 2.2.1 is the 4,7,13,16,21-pentaoxa-1,10-diazabicyclo-8,8,5-tricosane cryptand, and bpy.bpy.bpy is a macrobicyclic cryptand contg. three 2,2'-bipyridine groups. The possibility to design complexes exhibiting excellent absorption and luminescence properties is discussed on the basis of a detailed anal. of the above mentioned photophys. data. [on SciFinder(R)]Pubblicazioni consigliate
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