发光可调的同核[Eu(Ⅲ)]配位聚合物的制备

Fabrication of homonuclear Eu(Ⅲ) coordination polymer with tunable luminescence behavior

稀土发光材料优异的发光性能使其在众多领域中已显示出越来越重要的作用。本文首先合成了三联吡啶功能化的大π共轭配体(L),其结构通过1H NMR以及高分辨MS确证。利用Eu(Ⅲ)与三联吡啶的配位聚合,制备同核配位聚合物(L-Eu(Ⅲ))。荧光光谱实验研究表明,L-Eu(Ⅲ)具有激发波长响应的发光行为,当激发波长为295 nm时得到近白光发射材料,色坐标为(x=0.41,y=0.33),荧光寿命为0.25 ms。

Lanthanide luminescent materials play increasingly important roles in many different fields due to their excellent luminescence properties. Firstly, the conjugated ligand with the big π-system has been synthesized and characterized by Hydrogen nuclear magnetic resonance(^1H NMR) and high resolution mass spectrum(HR MS). Driven by the coordination polymerization between Eu(Ⅲ) and the moiety of terpyridine, the homonuclear Eu(Ⅲ) coordination polymer(L-Eu(Ⅲ)) was prepared, subsequently. Furthermore, the excitation wavelength-dependent luminescence of L-Eu(Ⅲ) was investigated. Interestingly, near white light emission was obtained under the excitation at 295 nm, with the CIE coordinated at(x=0.41,y=0.33), and the fluorescence lifetime of 0.25 ms, respectively.