Em. Georgiev et al., LUMINESCENT EUROPIUM(III) AND TERBIUM(III) IONS ENCAPSULATED IN A 2-AMINOETHOXY OR CARBAMOYLOXY SUBSTITUTED CALIXARENE HOST, Inorganica Chimica Acta, 227(2), 1994, pp. 293-296
A series of new 2-aminoethoxy and carbamoyloxy substituted calix[4]are
nes and calix[6]arenes has been synthesized and used to complex Eu3+ a
nd Tb3+ ions. Emissive complexes in methanol solvent are obtained. The
Tb3+ complexes are strongly emissive from a terbium centered excited
state. The excited states of the calix[6]arene complexes are less effe
ctively quenched by the addition of water than are those having the ca
lix[4]arene ligands.