[an error occurred while processing this directive]

高等学校化学研究 ›› 2015, Vol. 31 ›› Issue (6): 1039-1045.doi: 10.1007/s40242-015-5052-z

• Articles • 上一篇    下一篇

Synthesis, Spectroscopic, Thermochemical Properties of Lanthanide Complexes with 3,4-Diethoxybenzoic Acid and 1,10-Phenanthroline

QI Xiaoxia1,2, REN Ning3, ZHANG Dahai3, ZHANG Jianjun1,2   

  1. 1. Testing and Analysis Center, Hebei Normal University, Shijiazhuang 050024, P. R. China;
    2. College of Chemistry & Material Science, Hebei Normal University, Shijiazhuang 050024, P. R. China;
    3. College of Chemical Engineering & Material, Handan College, Handan 056005, P. R. China
  • 收稿日期:2015-02-11 修回日期:2015-03-16 出版日期:2015-11-01 发布日期:2015-04-13
  • 通讯作者: ZHANG Jianjun, REN Ning E-mail:jjzhang6@126.com;ningren9@163.com
  • 基金资助:

    Supported by the National Natural Science Foundation of China(Nos.21073053, 21473049) and the Natural Science Foundation of Hebei Province, China(No.B2012205022).

Synthesis, Spectroscopic, Thermochemical Properties of Lanthanide Complexes with 3,4-Diethoxybenzoic Acid and 1,10-Phenanthroline

QI Xiaoxia1,2, REN Ning3, ZHANG Dahai3, ZHANG Jianjun1,2   

  1. 1. Testing and Analysis Center, Hebei Normal University, Shijiazhuang 050024, P. R. China;
    2. College of Chemistry & Material Science, Hebei Normal University, Shijiazhuang 050024, P. R. China;
    3. College of Chemical Engineering & Material, Handan College, Handan 056005, P. R. China
  • Received:2015-02-11 Revised:2015-03-16 Online:2015-11-01 Published:2015-04-13
  • Contact: ZHANG Jianjun, REN Ning E-mail:jjzhang6@126.com;ningren9@163.com
  • Supported by:

    Supported by the National Natural Science Foundation of China(Nos.21073053, 21473049) and the Natural Science Foundation of Hebei Province, China(No.B2012205022).

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 conductance, X-ray diffraction and infrared spectrometry. The luminescence spectra of complexes 1 and 2 show the characteristic emission of Eu3+ ion(5D07F0—3) and Tb3+ ion(5D47F6—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 decomposed into H2O, 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 antibacterial activity against Candida albicans, Staphylococcus aureus and Escherichia coli.

关键词: Lanthanide complex, Thermodynamics, Thermal decomposition, Heat capacity, 3,4-Diethoxybenzoic acid

Abstract:

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 conductance, X-ray diffraction and infrared spectrometry. The luminescence spectra of complexes 1 and 2 show the characteristic emission of Eu3+ ion(5D07F0—3) and Tb3+ ion(5D47F6—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 decomposed into H2O, 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 antibacterial activity against Candida albicans, Staphylococcus aureus and Escherichia coli.

Key words: Lanthanide complex, Thermodynamics, Thermal decomposition, Heat capacity, 3,4-Diethoxybenzoic acid