在乙腈和去离子水的混合溶剂中合成了2个新的多酸基镧系双膦酸酯配合物[Eu(L)4]PW12O40·2CH3CN(1)和[Tb(L)3(H2O)]PW12O40(2)(L=亚乙基二膦酸四乙酯),并通过单晶X射线衍射、元素分析、红外光谱、粉末X射线衍射、热重分析和太赫兹时域光谱对2个配合物的性质进行了表征,分析了配合物的晶体结构及分子间弱作用力,研究了配合物的发光等性能.单晶结构表明,配合物1是以Eu(Ⅲ)为中心、L为配体螯合形成的扭曲四方反棱柱结构.配合物2是以Tb(Ⅲ)为中心、L和H2O为配体形成的扭曲单帽八面体结构.发光光谱表明配合物1和2所有的发射峰来源于金属内部的电荷迁移.此外,太赫兹时域光谱对配合物1和2的结构和发光的分析提供了帮助.
Two novel lanthanide bisphosphonate complexes containing Keggin polyoxometalates[Eu(L)4]PW12O40· 2CH3CN(1)and[Tb(L)3(H2O)]PW12O40(2)(L=tetraethyl ethylenediphosphonate)were synthesized in a mixed solvent of acetonitrile and deionized water.The properties of the two complexes were characterized by single-crystal X-ray diffraction,elemental analysis,infrared spectroscopy,powder X-ray diffraction,thermogravimetric analysis and tera-hertz time domain spectroscopy.The crystal structure and intermolecular weak force of the complexes were ana-lyzed,and the luminescence and other properties of the complexes were studied.The single crystal X-ray diffraction indicates that the structure of complex 1 is a twisted tetragonal antiprism with Eu(Ⅲ)as the center and L as the ligands chelate.The structure of complex 2 is a twisted single-capped octahedral with Tb(Ⅲ)as the center and L and H2O as the ligands.The luminescence spectra indicate that all emission peaks of complexes 1 and 2 are due to charge transfer within the metal.In addition,terahertz time-domain spectroscopy has helped in the study of complex-es 1 and 2.CCDC:2321285,1;,2321286,2.