Phase equilibrium of the La(NO3)(3)-Phe-H2O system at 298.15 K and the preparation and characterization of complexes

Authors
Fei, R Li, GS Xia, L Zhen, SQ
Citation
R. Fei et al., Phase equilibrium of the La(NO3)(3)-Phe-H2O system at 298.15 K and the preparation and characterization of complexes, CHEM PAP-CH, 55(1), 2001, pp. 23-26
Citations number
11
Categorie Soggetti
Chemistry
Journal title
CHEMICAL PAPERS-CHEMICKE ZVESTI
ISSN journal
03666352 → ACNP
Volume
55
Issue
1
Year of publication
2001
Pages
23 - 26
Database
ISI
SICI code
0366-6352(2001)55:1<23:PEOTLS>2.0.ZU;2-L
Abstract
The solubility properties of the La(NO3)(3)-Phe-H2O (Phe = D,L-beta -phenyl -alpha -alanine) system at 298.15 K in the whole concentration range have b een investigated by the semimicrophase equilibrium method. The correspondin g solubility diagram and refractive index diagram were constructed. The res ults indicated that there were tao stoichiometric complexes formed in this system, namely: La(Phe)(NO3)(3) . 5H(2)O and La(Phe)(2)(NO3)a . 3H(2)O. Bot h the complexes are incongruently soluble in water. Based on phase equilibr ium data, two kinds of complexes were prepared. Their composition and prope rties were investigated by chemical amalysis, elemental analysis, IR spectr a, and DTG-TG.