Thermogravimetric and spectroscopic characterization of trivalent lanthanide chelates with some schiff bases |
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Authors: | Al-Shihri A S M Abdel-Fattah H M |
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Institution: | (1) Chemistry of Department, Faculty of Science, King Khalid Univ., Abha, p.o. box 9004, Kingdom of Saudi Arabia |
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Abstract: | Solid complexes of two derivatives of Schiff bases SAT and SAZ with Pr(III), Nd(III), Gd(III), Dy(III), Ho(III), Er(III) and
Yb(III) were prepared and characterized by elemental analysis , IR spectra and TG. The suggested formula of the obtained solid
complexes is MLCl2(H2O)n] for sat and MLCl (H2O)n] for SAZ where M=trivalent lanthanide ion, L=deprotonated ligand and n=2-3. The TG gives information about the coordinated water molecules, thermal stability and the coordination number of M which was found to be 6–8. A scheme of thermal decomposition of the complexes is also proposed. Comparison of the IR spectra
of the ligands with those of their complexes indicate the center of chelation in SAT and SAZ which act as tridentate ligands.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | TG-DTA lanthanide complexes schiff bases |
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