The dehydration behaviour of rare earth complexes ofm-nitrobenzoic acid |
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| Authors: | Z L Wang C J Niu J F Ma J Z Ni |
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| Institution: | (1) Laboratory of Rare Earth Chemistry and Physics Changchum Institute of Applied Chemistry, Academy Sinica, 130022 Changchun, P. R. China |
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| Abstract: | Rare earth complexes ofm-nitrobenzoic acid (LnL3·2H2O,Ln=La-Lu and Y, except Pm, HL=m-nitrobenzoic acid) were synthesized and characterized by elemental analysis, chemical analysis, IR spectroscopy and X-ray diffraction analysis. The dehydration behaviour of these complexes was studied in detail by means of TG-DTA and DSC. Dehydration occurs over the temperature range 76–215°C, and the temperature of formation of the anhydrous complexes decreases with increasing atomic number of the rare earth. The activation energies and enthalpy changes for te dehydration were obtained. |
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| Keywords: | complexes DTA-TG-DSC IR luminescent materials rare earth complexes ofm-nitrobenzoic acid X-ray |
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