The Nd+3, Ho+3 and Eu+3 compounds with glycine, alanine and glutamic acid were synthesized and obtained as monocrystals. Absorption spectra in the range 8000-35 500 cm-1 were measured along the crystallographic axes at room temperature on a Cary 14 spectrophotometer. Luminescence spectra were recorded at the same temperature in the range 9000-16 600 cm-1. Intensities of the ff transitions were analyzed on the basis of the Judd theory, taking the dependence of intensity on the crystallographic axis position into account. Considerable differences in hypersensitive transitions in crystals with alanine, glycine and glutamic acid, whose symmetry changed from triclinic to monoclinic, were explained in terms of differences in the MeO distances.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry