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- Title
SYNTHESIS AND STUDY OF MIXED-LIGAND HETEROMETALLIC COMPLEXES OF COBALT AND NEODYMIUM SUCCINATES WITH PYRIDINE OR PHENANTHROLINE.
- Authors
Sliusarchuk, L. I.; Ivakha, N. B.; Zheleznova, L. I.; Kuleshov, S. V.; Trunova, O. K.
- Abstract
The paper reports the results of the study on the synthesis of new heterometallic complexes of Co(II) and Nd(III) with succinic acid in the presence of 1,10-phenanthroline or pyridine. The following hetero- and monocomplexes were synthesized: [Co(C4H4O4)-2Py]-2H2O and [Co(C4H4O4)- Phen].2H2О; [Nd,(C4H4O4)3]5H2О and [Nd(C4H4O4)3 2Phen]2H2O; [Co2Nd2(C4H4O4)54Py]4H2O and [Co2Nd2(C4H4O4)52Phen]4H2O (Phen - phenanthroline, and Py - pyridine). The study of their composition, structure, thermal properties and determination of the ability of he-terocomplexcs to form complex oxides was carried out. The complexes were characterized by a number of physicochemical methods: elemental analysis, IR- and diffuse reflection spectroscopies, X-ray powder diffraction and differential thermal analysis. Based on the analysis of diffuse reflection spectra and IR spectra ofhcterocomplexcs, it was shown that succinic add and 1,10-phenanthroline are bidentatcly bound to metal atoms. The metals arc connected by succinic acid, forming a chain. Oxide powders were obtained during thermolysis of hc-tcrocomplcxcs up to 00°C. The-composition of the synthesized hcteromctallic compounds was controlled by X-ray powder diffraction. It was shown that a complex oxide of NdCoO3 (cubic crystal system), without impurities, was formed, when the heterocomplex of phenanthroline [Co2Nd2(C4H4O4)3-2 Phen]-411,0 was heated to 800°C. When heating the heterocomplex of pyridine [Co2Nd2(C4H4O4)5-4Py]-4H2O, in addition to the complex oxide-NdCoO3, oxides Nd2O3 (hexagonal crystal system), Nd2O3 (cubic crystal system) and Co3O4 oxide-(cubic crystal system) were forme-d. The he-terocomplex [Co2Nd2(C4H4O4)5-2Phcn]-4H2O can be used as a precursor for the synthesis of cobaltate of neodymium with lower energy costs than in solid-phase synthesis.
- Subjects
CUBIC crystal system; SUCCINATES; HEXAGONAL crystal system; PHENANTHROLINE; X-ray powder diffraction; NEODYMIUM compounds
- Publication
Issues of Chemistry & Chemical Technology / Voprosy Khimii & Khimicheskoi Tekhnologii, 2023, Issue 4, p94
- ISSN
0321-4095
- Publication type
Article
- DOI
10.32434/0321-4095-2023-149-4-94-104