Tb配合物的水热合成、晶体结构及荧光性质

Hydrothermal Synthesis, Crystal Structure and Fluorescence Property of a Tb Coordination Complex

关磊 陈贤 范博文 陈雅旭 尹鹏鹏 王莹

Lei Guan Xian Chen Bowen Fan Yaxu Chen Pengpeng Yin Ying Wang

辽宁石油化工大学 石油化工学院，辽宁 抚顺 113001

School of Petrochemical Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，China

以1,3,6?萘三磺酸钠（Na3L）、4,4'?联吡啶（4,4'?bipy）、Tb(NO3)3·6H2O为原料，通过水热合成反应制备了Tb配合物[Tb(H2O)8]·(L)·2(4,4'?bipy)·3H2O（配合物1）。利用单晶X?射线衍射、傅里叶红外光谱、热重分析以及元素分析等表征手段，分析了配合物1的分子结构和组成，并且研究了其热稳定性和荧光发射性质。结果表明，Tb3+是八配位，呈四方反棱柱配位构型，与8个H2O分子配位形成[Tb(H2O)8]3+；L3-没有与金属离子配位，只平衡了分子内的正电荷；L3-的磺酸基与配位H2O分子之间形成氢键，将[Tb(H2O)8]3+和L3-相连，形成一维链状结构，进而将其拓展成二维层状结构；配合物1在395、453 nm处的荧光发射峰为Na3L的特征峰，在545、601、641 nm处的荧光发射峰为Tb3+的特征峰。

The Tb coordination complex [Tb(H2O)8]?(L)?2(4,4'?bipy)?3H2O（complex 1） was synthesized by hydrothermal reaction of sodium 1,3,6?naphthalene trisulfonate (Na3L) and 4,4'?bipy (4,4'?bipy) with Tb(NO3)3?6H2O. The molecular structure and composition of complex 1 were characterized by single crystal X?ray diffraction, FT?IR spectroscopy, thermogravimetric analysis and elemental analysis. Thermal stability and fluorescence emission properties of complex 1 were also evaluated. The results indicate that Tb3+ is eight?coordinated in a tetragonal antiprismatic coordination configuration and coordinates with eight H2O molecules to form [Tb(H2O)8]3+.L3- does not coordinate with metal ion, but only balances the positive charge in the molecule. The formation of hydrogen bonds between the sulfonic acid group of the L3- and the coordinating H2O molecule connects the [Tb(H2O)8]3+ and the L3- to form a one?dimensional chain structure,which in turn expands into a two?dimensional lamellar structure.The fluorescence emission peaks of complex 1 at 395，453 nm are the characteristic peaks of Na3L, and the emission peaks at 545,601，641 nm are the characteristic peaks of Tb3+.

辽宁省教育厅科学研究经费项目(L2019010)

10.12422/j.issn.1006-396X.2023.03.009