摘要 :
The complexes with the genera formula REP_3A.H_2O[P=2-(COO)C_6H_4CONHC_6H_4X, X=2-Cl, 4-Br; A=Gly, Ala, Leu; RE=Pr~3+, Nd~3+] were synthesized characterized by elemental analysis, IR and reflectance electronic spectra and TG metho...
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The complexes with the genera formula REP_3A.H_2O[P=2-(COO)C_6H_4CONHC_6H_4X, X=2-Cl, 4-Br; A=Gly, Ala, Leu; RE=Pr~3+, Nd~3+] were synthesized characterized by elemental analysis, IR and reflectance electronic spectra and TG methods. The results show that rare earth ion in each complex is coordinated by three oxygen atoms. One is from the amid and the other two from the hydroxyl in the carboxylate and the ammoniated respectively, and each complex contains one coordinate water molecule. Condon parameters F_k, Lande parameters (ζ_4f), Nephelanxetic ratio (β), percentage convince parameter (δ) and bonding parameter (b~1/2) of the cheats were calculated from the reflectance electronic spectra, indicating certain covalent character in the metalligand bond. The apparent decompose activation energies were evaluated and the decompose mechanism were discussed.
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