摘要
Three novel lanthanide complexes [Ln（3,4-DEOBA）3phen]2[Ln=Eu（1）, Tb（2）, Dy（3）; 3,4-DEOBA=3,4- diethoxybenzoate; phen=1,10-phenanthroline] were synthesized and characterized by elemental analysis, molar con- ductance, X-ray diffraction and infrared spectrometry. The luminescence spectra＇of complexes 1 and 2 show the cha- racteristic emission of EU^3＋ ion（^5D0→7F0-3） and Tb^3＋ ion（^5D4→^7F6-3）. The thermal decomposition mechanism of the title complexes and the analysis of the evolved gases were investigated by thermogravimetry/differential scanning calorimetry-Fourier transform infrared（TG/DSC-FTIR） technology. The results indicate the complexes are thermally stable. In the thermal decomposition of the complexes, phen molecules lost firstly, and then 3,4-DEOBA ligand de- composed into H20, CO2 and other gaseous molecules. Besides, several gaseous organic fragments were also detected. The heat capacities of complexes 1--3 were measured by DSC in a temperature range of 263.15--340.15 K. Based on the fitted polynomial and thermodynamic equations, the smoothed heat capacities and thermodynamic functions of the three complexes were calculated. The study on biological activity showed that the complexes exhibited good an- tibacterial activity against Candida albicans, Staphylococcus aureus and Escherichia coll.
Three novel lanthanide complexes [Ln（3,4-DEOBA）3phen]2[Ln=Eu（1）, Tb（2）, Dy（3）; 3,4-DEOBA=3,4- diethoxybenzoate; phen=1,10-phenanthroline] were synthesized and characterized by elemental analysis, molar con- ductance, X-ray diffraction and infrared spectrometry. The luminescence spectra＇of complexes 1 and 2 show the cha- racteristic emission of EU^3＋ ion（^5D0→7F0-3） and Tb^3＋ ion（^5D4→^7F6-3）. The thermal decomposition mechanism of the title complexes and the analysis of the evolved gases were investigated by thermogravimetry/differential scanning calorimetry-Fourier transform infrared（TG/DSC-FTIR） technology. The results indicate the complexes are thermally stable. In the thermal decomposition of the complexes, phen molecules lost firstly, and then 3,4-DEOBA ligand de- composed into H20, CO2 and other gaseous molecules. Besides, several gaseous organic fragments were also detected. The heat capacities of complexes 1--3 were measured by DSC in a temperature range of 263.15--340.15 K. Based on the fitted polynomial and thermodynamic equations, the smoothed heat capacities and thermodynamic functions of the three complexes were calculated. The study on biological activity showed that the complexes exhibited good an- tibacterial activity against Candida albicans, Staphylococcus aureus and Escherichia coll.
基金
Supported by the National Natural Science Foundation of China（Nos.21073053, 21473049） and the Natural Science Foundation of Hebei Province, China（No.B2012205022）.
