2个金属盐调控的稀土钇(Ⅲ)配合物的合成、结构和荧光性能

Two yttrium(Ⅲ)complexes controlled by metal salts:Synthesis,structure and fluorescence properties

通过溶剂热法合成制备了基于三唑衍生物6-(1H-1,2,4-三唑-1-基)吡啶-2-甲酸(HTPA)、乙二酸(H2ox)和不同金属钇(Ⅲ)盐离子的2种结构新颖的配合物,即{[Y_(2)(H_(2)O)_(4)(TPA)_(2)(ox)(NO_(3))_(2)]·1.5H_(2)O}n(配合物1)和{[Y_(2)(H_(2)O)_(4)(TPA)_(2)(ox)_(2)]·4H_(2)O}n(配合物2).通过单晶和粉末X-射线衍射、元素分析、红外光谱和荧光光谱等方法,对配合物的结构和性能进行了表征.结果表明:配合物1属于三斜晶系的Pī空间群,不对称单元仅包含1个晶体学独立的Y(Ⅲ)离子,表现为具有中心对称的[Y_(2)(TPA)_(2)]双核结构;而配合物2属于单斜晶系的P21/n空间群,不对称单元中包含2个Y(Ⅲ)离子,由草酸阴离子桥连相邻[Y_(2)(TPA_(2))]二聚体结构单元形成一维无限链状结构.固态光致发光光谱显示,2种配合物具有相似的光致发光性能.

Based on triazole derivatives 6-(1H-1,2,4-triazol-1-yl)pyridine-2-carboxylic acid(HTPA),oxalic acid(H_(2)ox)and different Y(Ⅲ)saline ions,two novel complexes including{[Y_(2)(H_(2)O)_(4)(TPA)_(2)(ox)(NO_(3))_(2)]·1.5H2O}n(Complex 1)and{[Y_(2)(H_(2)O)_(4)(TPA)_(2)(ox)_(2)]·4H2O}n(Complex 2)were synthesized by solvothermal method.The structure and property of two complexes were characterized by single-crystal and power X-ray diffraction,elemental analysis,FT-IR spectrum and fluorescence spectroscopy.The results show that Complex 1 crystallizes in triclinic Pīspace group and the asymmetric unit contains only one crystallographically independent Y(Ⅲ)ion,which exhibits a centrosymmetric[Y_(2)(TPA)_(2)]dinuclear structure;Complex 2 crys-tallizes in the monoclinic P21/n space group,and the asymmetric unit contains two Y(Ⅲ)ions.The oxalate anion bridges adjacent[Y_(2)(TPA)_(2)]dimer to form a one-dimensional infinite chain structure.The solid-state photoluminescence spectrum shows that the two complexes have similar luminescent properties.