| 3，4-二甲氧基苯乙酸邻菲咯啉轻稀土配合物的合成、晶体结构、荧光光谱及热行为(英文) |
| Synthesis, Crystal Structure, Luminescence Spectrum and Thermal Analysis of Light Rare Earth Complexes from 3,4-Dimethoxyphenylacetic Acid and 1,10-Phenanthroline |
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| 摘要: 合成了3，4-二甲氧基苯乙酸邻菲咯啉轻稀土配合物：[RE2(DMPA)6(phen)2](RE=Ce (1)，Pr (2)，Nd (3)，Eu (4)；HDMPA=3，4-二甲氧基苯乙酸，C12H12O4；phen=1，10-邻菲咯啉)，用元素分析、红外光谱、热重分析对产物进行表征，用单晶X-射线衍射方法测定了配合物3的晶体结构。配合物C84H82Nd2N4O24 (3)属于三斜晶系，P1 空间群，晶胞参数：a=1.242 06(9) nm，b=1.244 56(9) nm，c=1.477 88(11) nm，α=90.617(4)°，β=103.486(4)°，γ=116.870(3)°，晶胞体积：V=1.963 8(2) nm3，晶胞内结构基元数Z=1，分子量Mr=1 820.02，电子数F(000)=926，密度Dc=1.539 g·cm-3，吸收系数μ(Mo Kα)=1.389 mm-1。测定了铕配合物的荧光光谱，荧光光谱表明，配合物显示了铕(Ⅲ)离子的特征发射，这表明配体将吸收的能量有效地转移给了中心离子，配体起到了很好的敏化作用。同时也测定了铕配合物的热分解情况，并利用TG-DTG曲线采用非等温积分法和微分法研究了热分解动力学机理。 |
| 关键词: 稀土配合物 3，4-二甲氧基苯乙酸 邻菲咯啉 晶体结构 荧光光谱 热分解动力学机理 |
| 基金项目: |
| Abstract: Four light rare earth coordination polymers [RE2(DMPA)6(phen)2] (RE=Ce (1), Pr (2), Nd (3), Eu (4); HDMPA=3,4-dimethoxyphenylacetic acid, C12H12O4; phen=1,10-phenanthroline) were synthesized and characterized by elemental analysis, IR, TG-DTG and X-ray crystallographically. The single-crystal X-ray diffraction studies demonstrated that complex 3 is crystallize in triclinic space group P1 with a=1.242 06(9) nm, b=1.244 56(9) nm, c=1.477 88(11) nm, α=90.617(4)°, β=103.486(4)°, γ=116.870(3)°, V=1.963 8(2) nm3, Z=1, Mr=1 820.02, F(000)=926, Dc=1.539 g·cm-3， μ(Mo Kα)=1.389 mm-1 and formed 3D supramolecular architectures by hydrogen bonds and π-π stacking interactions. In all these complexes, the coordination number around RE(Ⅲ) center is nine. The fluorescence spectrum of complex 4 is investigated. It is indicated that the luminescence behavior of complex results from metal-centered emission, ligand can transfer the energy to the central metal efficiently and can sensitize the central metal. The thermal decomposition of complex 4 and its kinetic mechanisms and equations are studied under the non-isothermal integral and differential methods in air by TG-DTG curves. CCDC: 732322, 3. |
| Keywords: rare earth complex 3,4-dimethoxyphenylacetic acid 1,10-phenanthroline crystal structure fluorescence spectrum kinetic mechanism of thermal decomposition |
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| 余玉叶,李花琼,刘建风,赵国良.3，4-二甲氧基苯乙酸邻菲咯啉轻稀土配合物的合成、晶体结构、荧光光谱及热行为(英文)[J].无机化学学报,2010,26(12):2266-2272. |
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