物理化学学报 >> 2016, Vol. 32 >> Issue (4): 901-906.doi: 10.3866/PKU.WHXB201602173

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配合物[Eu(4-MOBA)3(terpy)(H2O)]2的合成、表征、热分解机理及性质

霍建霞1,2,宋素伟4,靳成伟1,2,任宁3,*(),耿丽娜2,张建军1,2,*()   

  1. 1 河北师范大学分析测试中心, 石家庄 050024
    2 河北师范大学化学与材料科学学院, 石家庄 050024
    3 邯郸学院化学化工与材料学院, 河北邯郸 056005
    4 中石油京唐液化天然气有限公司, 河北唐山 063210
  • 收稿日期:2015-12-29 发布日期:2016-04-07
  • 通讯作者: 任宁,张建军 E-mail:ningren9@163.com;jjzhang6@126.com
  • 基金资助:
    国家自然科学基金(31201305, 21473049);河北省自然科学基金(B2016205207)

Synthesis, Characterization, Thermal Decomposition Mechanism and Properties of the [Eu(4-MOBA)3(terpy)(H2O)]2 Complex

Jian-Xia HUO1,2,Su-Wei SONG4,Cheng-Wei JIN1,2,Ning REN3,*(),Li-Na GENG2,Jian-Jun ZHANG1,2,*()   

  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 University, Handan 056005, Hebei Province, P. R. China
    4 Petro China Jingtang LNG Co., Ltd., Tangshan 063210, Hebei Province, P. R. China
  • Received:2015-12-29 Published:2016-04-07
  • Contact: Ning REN,Jian-Jun ZHANG E-mail:ningren9@163.com;jjzhang6@126.com
  • Supported by:
    the National Natural Science Foundation of China(31201305, 21473049);Natural Science Foundation of Hebei Province, China(B2016205207)

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摘要：

合成了一个新的配合物[Eu(4-MOBA)3(terpy)(H2O)]2 (4-MOBA:4-甲氧基苯甲酸根, terpy:2, 2':6', 2"-三联吡啶)。采用傅里叶变换红外(FTIR)光谱、元素分析和X射线粉末衍射(XRD)技术对标题配合物进行了表征,用X射线单晶衍射仪测定了配合物的晶体结构,在配合物中每个Eu3+离子与一个三联吡啶分子、一个水分子和三个羧酸分子结合,配位数为9,羧酸基团的配位模式包含三种:双齿螯合,桥连双齿,单齿。根据热重-差示扫描量热/傅里叶变换红外(TG-DSC/FTIR)联用技术,研究了配合物的热分解机理。配合物的发射光谱显示出Eu3+离子的特征荧光发射,表明三联吡啶和4-甲氧基苯甲酸在该体系中可作为敏化集团。另外,文中还讨论了配合物对白色念珠菌和大肠杆菌的抑菌活性。

关键词: 镧系配合物, 晶体结构, 热分解机理, 荧光, 2, 2':6', 2"-三联吡啶, 抑菌活性

Abstract:

A new complex [Eu(4-MOBA)3(terpy)(H2O)]2 (4-MOBA: 4-methoxybenzoate, terpy: 2, 2' :6', 2"-terpyridine) was synthesized. The complex was characterized using Fourier transform infrared (FTIR) spectroscopy, elemental analysis, and powder X-ray diffraction (XRD). The structure of the complex was determined using single-crystal XRD. In the complex, each Eu3+ ion is nine coordinated to one terpy molecule, one water molecule and three carboxylate groups. The carboxylate groups are bonded to the Eu3+ ion in three modes: bidentate, bridging bidentate, and monodentate. Based on thermogravimetry-differential scanning calorimetry/Fourier transform infrared (TG-DSC/FTIR) measurements, we determined the thermal decomposition mechanism. The emission spectra of the complex exhibited characteristic luminescence, suggesting that terpy and 4-methoxybenzoic acid can act as sensitizing chromophores in this system. Also, bacteriostatic activities for the complex to Candida albicans and Escherichia coli are discussed.

Key words: Lanthanide complex, Crystal structure, Thermal decomposition mechanism, Luminescence, 2, 2':6', 2"-Terpyridine, Antimicrobial activity