【摘要】 采用水热合成法,以吡啶二甲酸为基本构筑单元合成了铕-钴异核配合物Eu₂Co₂ [C₅H₃（COO）₂N]₆（H₂O）₄,并通过X射线单晶衍射仪、元素分析、差热热重（TG-DCS）、红外（IR）、荧光光谱、磁性分析等研究了其结构、荧光性质及磁性质等。研究发现配合物通过吡啶二甲酸桥接形成了独特的新型铕-钴双异核三维结构,同时具有磁学和荧光等颇具应用价值的性质。配合物的摩尔磁化率与温度的乘积随温度的降低从室温下的3.52cm³·K·mol^-1逐渐下降到5 K下的0.27 cm³·K·mol^-1,表明相邻顺磁离子间存在反铁磁相互作用,·荧光光谱显示在395 nm激发光下Eu³⁺的5D₀→⁷F₁磁偶极子跃迁和⁵D₀→⁷F₂的电偶极子跃迁产生593和618nm的发射峰。619nm处的强度远远高于593nm处强度,表明了Eu³⁺在晶体中的较低对称性。更多还原

【Abstract】 This work adopts the hydrothermal synthesis method, using pyridine two formic acid as the basic building blocks to synthesize Eu-Co heteronuclear complexes Eu₂Co₂[C₅H₃（COO）₂N]₆（H₂O）₄. The structure,fluorescent properties and magnetic properties were studied by X-ray diffraction, elemental analysis, thermogravimetric（TG-DCS）, infrared spectroscopy（IR）, fluorescence spectroscopy, magnetic analysis. It was found that the complexes formed a unique new structure of europium cobalt double heteronuclear by bridging pyridine dicarboxylic acid,and possessed the properties of magnetism and fluorescence. The product of molar susceptibility and the temperature decreases with the decrease of temperature from 3. 52 cm · K · mol^-1 at room temperature to 0. 27 Cm³ ·K·mol^-1 at 5 K, indicating that the neighboring paramagnetic are antiferromagnetic interactions among magnetic ions, fluorescence spectra indicate that the emitted 395 nm light excited Eu ⁵ D₀→⁷ F₁ magnetic dipole transition and ⁵ D₀→⁷ F₂ electric dipole transitions at 593 and 618 nm. The strength of 619 nm is much higher than that of 593 nm, indicating the lower symmetry of Eu³⁺ in the crystal.更多还原