Thermal properties of lanthanide(III) complexes with 5-amino-1,3-benzenedicarboxylic acid

• DOI: 10.1007/s10973-005-7463-4
• Publication Date: 2006-08-10T12:06:33Z
• Authors: Z. Rzączyńska; M. Woźniak; W. Wołodkiewicz; A. Ostasz; S. Pikus
• Keywords: Isostructural; Anhydrous; Inert gas; Thermogravimetry; Inert

The complexes of yttrium(III) and lanthanides(III) with 5-amino-1,3-benzenedicarboxylic acid form two isostructural series of compounds and have the general formula Ln2(C8H5O4N)3·nH2O, where n = 13 for Y, La-Er and n=9 for Tm, Yb, Lu. They are insoluble in water and stable at room temperature. On heating in air or inert gas atmosphere they lose all water molecules in several steps. The anhydrous compounds are stable to about 400°C and next decompose to oxides.