Abstract

A new lanthanide metal complex [Tm₂(H₂L)₃(phen)₂] (1) (Na₂H₂L = 4,5-dihydroxy-1,3-benzenedisulfonic acid disodium salt, phen = 1,10-phenanthroline) was synthesized by hydrothermal method. It has been characterized by single crystal X-ray diffraction, elemental analysis and thermogravimetric (TG) analysis. The X-ray diffraction analysis revealed that the dinuclear thulium complex is formed with three bridged H₂L^2– ligands and one phen molecule around each thulium center. The center thulium atoms are eight-coordinate in distorted double-capped triangular prism and dodecahedral geometries, respectively. Each bridged H₂L^2– acts as a tetradentate ligand with a non-coordinated sulfonate group. To the best of our knowledge, complex 1 is the first example of a dinuclear H₂L^2–-bridged lanthanide complex with phen molecules. It exhibits the fluorescent emission at 475, 538, and 615 nm, which are attributed to the ¹G₄-³H₆, ¹D₂-³H₄, and ¹G₄-³H₄ transitions of thulium ion, respectively.

中文翻译：

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磺酸盐-苯酚配体和1,10-菲咯啉的Di双核配合物的水热合成，表征与性能

摘要

一种新的镧系金属络合物[Tm ₂（H ₂ L）₃（phen）₂ ]（1）（Na ₂ H ₂ L = 4,5-二羟基-1,3-苯二磺酸二钠盐，phen = 1,10-菲咯啉是通过水热法合成的。它的特征在于单晶X射线衍射，元素分析和热重（TG）分析。X射线衍射分析表明，双核th配合物由三个桥连的H ₂ L ^2–每个th中心周围都有一个配体和一个phen分子。中心th原子在扭曲的双帽三角棱镜和十二面体几何结构中分别为八坐标。每个桥接的H ₂ L ^2–充当具有非配位磺酸盐基团的四齿配体。据我们所知，配合物1是具有phen分子的双核H ₂ L ^2-桥接镧系元素配合物的第一个例子。它显示出在475nm的荧光发射，538，和615nm，这是归因于¹ ģ ₄ - ³ ħ ₆，¹ d ₂ - ³ ħ ₄和¹ ģ ₄ - ³ ħ _4个分别转变铥离子的。