4-羟基吡啶-2,6-二甲酸铽配位聚合物的合成与光谱性能研究

Structural and Spectral Study of Terbium 4-Hydroxypyridine-2,6-Dicarboxylic Acid Coordination Polymer

在水热条件下合成了一个二维稀土铽的配位聚合物[Tb(cam)(H2O)3]n·nH2O)(1)(H3cam=4-羟基吡啶-2,6-二甲酸),通过元素分析、红外光谱、X-射线单晶衍射、荧光、紫外吸收、热重分析和X-射线粉末衍射对其进行表征。Tb(Ⅲ)离子八配位呈十二面体几何构型。每个Tb(Ⅲ)离子与3个(cam)3-离子相连形成具有(4·82)型拓扑的二维层状结构,层与层之间通过氢键的识别作用拓展为三维超分子结构。室温下配合物1呈现出稀土Tb3+的特征荧光发射峰,且发光强度较大,说明配体的能级与TbⅢ离子的发射能级比较匹配。

A 2D Tb Ⅲ coordination polymer [Tb（cam）（H2O）3]n·nH2O （1） （H3cam=4-Hydroxypyridine-2,6-dicarbo- xylic acid） was synthesized under hydrothermal conditions and characterized by elemental analysis, IR spectrum, single-crystal X-ray diffraction, UV-Vis, Fluorescence, TGA and XRD. The Tb Ⅲ ion is eight-coordinate with a slightly distorted dodecahedron geometry. One Tb Ⅲ ion joined with three （cam）3- ions to form a 2D layered with （4.82） topological. The neighboring layers are linked into 3D supramolecular network through hydrogen bonding interaction. The luminescence experiments show that 1 exhibits typical TbⅢ-centered emissions in the solid state, the energy level difference was well matched and the emission of terbium complex was characteristic and high. CCDC： 922429.