A.N. Gusev, S Shulgin, W. Linert, M. Hasegawa, G. Aleksandrov, I. Eremenko:
"Adducts of lanthanide acetylacetonates with 5-phenyl-2-(2-pyridyl)-7,8-benzo-6,5-dihydro-1,3,6-triazaindolizine: structure and photoluminescence";
Russian Chemical Bulletin, 63 (2014), 7; S. 1493 - 1497.

Kurzfassung englisch:
A series of isostructural complexes of the formula Ln(acac)3L (where Hacac is the acetyl- acetone, L is the 5-phenyl-2-(2-pyridyl)-7,8-benzo-6,5-dihydro-1,3,6-triazaindolizine, Ln are the LaIII, TbIII, EuIII, and SmIII) was studied. Molecular and crystal structures of terbium and samarium complexes were established by X-ray diffraction analysis. Luminescence properties of solid samples were studied. Coordination of 5-phenyl-2-(2-pyridyl)-7,8-benzo-6,5-dihydro- 1,3,6-triazaindolizine as an additional ligand increases intensity of photoluminescence. Lumi- nescence spectra of compositions EuxTb1-x(acac)3L and La0.6Eu0.1Tb0.3(acac)3L were studied. A combination of several lanthanide ions allowed us to obtain almost white emission.

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