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Thermal and spectroscopic (IR, XPS) properties of lanthanide(III) benzene-1,3,5-triacetate complexes.
Thermal and spectroscopic (IR, XPS) properties of lanthanide(III) benzene-1,3,5-triacetate complexes.
- Source :
-
Journal of Thermal Analysis & Calorimetry . Oct2016, Vol. 126 Issue 1, p327-342. 16p. - Publication Year :
- 2016
-
Abstract
- The metal-organic frameworks of the formula Ln(bta)· nHO where n = 3, 4, 5 or 6; bta = benzene-1,3,5-triacetate ion: [CH(COO)]; Ln = La(III), Nd(III), Eu(III), Tb(III), Ho(III), Tm(III), Lu(III) were synthesized by the reaction of LnCl· xHO with ammonium salt of Hbta acid in water solution. Insoluble water compounds crystallize in the monoclinic or triclinic crystal system, and they are stable up to 30 °C. When heated, they decompose up to 160-200 °C in two stages to stable anhydrous compounds. The dehydrated compounds Ln(bta) are still crystalline and stable up to about 350 °C. When heated above 350 °C, they undergo decomposition where the intermediate products are LnOCO or TbOCO and the residues are: LnO or TbO. The interpretation of IR spectra of title compounds was made taking into consideration the experimental and theoretical wavenumbers obtained for Hbta specie. The XPS spectra of Hbta and its complexes were recorded. The way of metal-carboxylate group of ligand coordination was discussed. This work presents the results of the XPS analyses, which allowed to determine the binding energies ( E ) for the main lines of Ln3d, Ln4d, Ln5p, C1s, O1s spectra, spin-orbital splitting and full width at half maximum complexes. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13886150
- Volume :
- 126
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Journal of Thermal Analysis & Calorimetry
- Publication Type :
- Academic Journal
- Accession number :
- 117956504
- Full Text :
- https://doi.org/10.1007/s10973-016-5521-8