Abstract

The europium complex 1 ([Eu₂Na₃(bsalen)₂(L)₂(CH₃O)(NO₃)₂] ⋅ 3H₂O) with unusual trigonal bipyramid-shaped core [Na₃Eu₂] has been formed via the reaction of Eu(NO₃)₃ with N,N'-bis(3-methoxy-salicylidene)-ethylenediamine (bsalen^2– ligand), 2-hydroxy-4-methoxybenzophenone (HL) and NaOH in the ratio of 1 : 1 : 1 : 3.5 in methanol. Crystal structure reveals that each Eu(III) ion is encapsulated in the inner cavity of bsalen^2– ligand. Photoluminescence (PL) measurement results show that the europium complex exhibits intense red emission (611 nm) under blue light excitation (417 nm) with quantum efficiency of 16.9% and lifetime of 1.02 ms.

中文翻译：

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新型Salen-桥联的五核Eu-Na配合物的合成，晶体结构和可见光敏化的红色发光

摘要

形成了具有异常三角双锥体形核[Na ₃ Eu ₂ ]的complex络合物1（[Eu ₂ Na ₃（bsalen）₂（L）₂（CH ₃ O）（NO ₃）₂ ] ⋅3H ₂ O）通过铕（NO的反应₃）₃与ñ，ñ “ -双（3-甲氧基-亚水杨基）乙二胺（bsalen ^2-配体），2-羟基-4-甲氧基二（HL）和NaOH在1比1：1：3.5的甲醇溶液。晶体结构表明每个Eu（III）离子都被包封在bsalen的内腔中^{2 –}配体。光致发光（PL）测量结果表明，complex配合物在蓝光激发（417 nm）下表现出强烈的红色发射（611 nm），量子效率为16.9％，寿命为1.02 ms。