Microwave-assisted Preparation, Structures, and Photoluminescent Properties of [Ln(NO3)2(H2O)3(L)2](NO3)(H2O) {Ln = Tb, Eu; L = 2-(4-pyridylium)ethanesulfonate, (4-pyH)+-CH2CH2-SO3–}

Bulletin of the Korean chemical society

Soon W. Lee¹  Zhen Nu Zheng¹ 

关键词: Lanthanide complex;    Crystal structure;    Microwave heating;    Zwitter ion;    Emission;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Two lanthanide complexes, [Ln(NO3)2(H2O)3(L)2](NO3)(H2O) {Ln = Eu (1), Tb (2); L = 2-(4-pyridylium)- ethanesulfonate, (4-pyH)+-CH2CH2-SO3 –)}, were prepared from lanthanide nitrate and 4-pyridineethanesulfonic acid in H2O under microwave-heating conditions. Complexes 1 and 2 are isostructural, and the lanthanide metal in both complexes is coordinated to nine oxygen atoms. The pyridyl nitrogen in the ligand is protonated to give a zwitter ion that possesses an NH+ (pyridyl) positive end and an SO3 – negative end. All O−H and N−H hydrogen atoms participate in hydrogen bonds to generate a two-dimensional (complex 1) or a threedimensional network (complex 2). Complex 1 exhibits an intense red emission, whereas complex 2 exhibits an intense green emission in the solid state at room temperature.

【 授权许可】

Unknown