Syntheses, characterization, and luminescence of two lanthanide complexes [Ln2（acetate）6（H2O）4]·4H2O （Ln=Tb（1）, Sm（2））
来源期刊：Journal of Rare Earths2008年第2期
论文作者：于琼燕 周秀霞 刘茂胜 陈键侨 周正元 殷霞 蔡跃鹏
文章页码：178 - 184
摘 要：Two dinuclear compounds [Ln2（acetate）6（H2O）4]·4H2O （Ln=Tb（1）, Sm（2）） were obtained by the hydrothermal reaction of Ln2O3 with malonic acid at 150 °C. Both compounds were characterized by elemental analyses, infrared spectra, and single crystal X-ray diffraction. The results showed that complexes 1 and 2 were isomorphous and crystallize in triclinic space group P?1. The coordination geometry around Ln（III） ions in the complexes 1 and 2 was a distorted tricapped trigonal prism with a nine coordination. In the crystal, the molecular organi- zation was further stabilized by well-defined weak hydrogen bonding interactions between the neutral dinuclear molecular units that led to the formation of a three-dimensional network. The fluorescence properties of the two complexes 1 and 2 in organic solvents were also stud- ied. The results show that the ligand acetate favored energy transfer to the emitting energy level of Tb（III） in complex 1. Some factors that influence the fluorescent intensity were also discussed in the article.
于琼燕，周秀霞，刘茂胜，陈键侨，周正元，殷霞，蔡跃鹏
摘 要：Two dinuclear compounds [Ln2（acetate）6（H2O）4]·4H2O （Ln=Tb（1）, Sm（2）） were obtained by the hydrothermal reaction of Ln2O3 with malonic acid at 150 °C. Both compounds were characterized by elemental analyses, infrared spectra, and single crystal X-ray diffraction. The results showed that complexes 1 and 2 were isomorphous and crystallize in triclinic space group P?1. The coordination geometry around Ln（III） ions in the complexes 1 and 2 was a distorted tricapped trigonal prism with a nine coordination. In the crystal, the molecular organi- zation was further stabilized by well-defined weak hydrogen bonding interactions between the neutral dinuclear molecular units that led to the formation of a three-dimensional network. The fluorescence properties of the two complexes 1 and 2 in organic solvents were also stud- ied. The results show that the ligand acetate favored energy transfer to the emitting energy level of Tb（III） in complex 1. Some factors that influence the fluorescent intensity were also discussed in the article.
关键词：
