A new family of lanthanide terpyridine nitrate complexes : Solvothermal syntheses, crystal structures and luminescent properties of [Ln(pytpy)(NO3)2(μ-OCH3)]2
A new family of lanthanide terpyridine nitrate complexes : Solvothermal syntheses, crystal structures and luminescent properties of [Ln(pytpy)(NO3)2(μ-OCH3)]2
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DOI：
10.1016/j.ica.2007.10.009
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发表时间：
2008-05
影响因子：
2.8
通讯作者：
Lei Gou;Qing-Ran Wu;Huaiming Hu;Ting Qin;G. Xue;Meng-Lin Yang;Zongxun Tang
中科院分区：
文献类型：
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作者：
Lei Gou;Qing-Ran Wu;Huaiming Hu;Ting Qin;G. Xue;Meng-Lin Yang;Zongxun Tang
合成了配合物[Ln(pytpy)(NO3)2(μ-OCH3)]2(Ln=Eu(III), Tb(III), Dy(III), pytpy=4′-(n-pyridyl)-2,2′:6′,2″-三联吡啶, n=2, 3)，并通过红外、元素分析、紫外-可见和发光光谱进行表征。三种配合物结晶为单斜晶系，P21/n空间群。镧系元素离子由来自三齿pytpy配体的三个氮原子、来自两个二齿硝酸根基团的四个氧原子和来自两个甲氧基基团的两个氧原子进行九配位，形成扭曲的三端三角棱柱几何形状。二甲氧基桥以不对称方式将两个金属离子连接成二聚结构，Eu(III)、Tb(III) 和 Dy(III) 配合物的短 Ln⋯Ln 距离分别为 3.767(1)、3.740(1) 和 3.720(1)Å。光致发光测量表明，1和3分别发出固态Tb(III)和Eu(III)离子的特征发光。还研究了Eu(III)配合物在溶剂中的发光光谱。
The complexes [Ln(pytpy)(NO3)2(μ-OCH3)]2(Ln=Eu(III), Tb(III), Dy(III), pytpy=4′-(n-pyridyl)-2,2′:6′,2″-terpyridine, n=2, 3) were synthesized and characterized by IR, elemental analyses, UV–Vis and luminescent spectroscopy. Three complexes crystallized in monoclinic system, P21/n space group. Lanthanide ions are nine-coordinated by three nitrogen atoms from tridentate pytpy ligands, four oxygen atoms from two bidentate nitrate groups and two oxygen atoms from two methoxo groups, forming distorted tricapped trigonal prismatic geometries. The dimethoxo-bridges connect two metal ions in asymmetric fashion into dimeric structures with short Ln⋯Ln distances of 3.767(1), 3.740(1) and 3.720(1)Å for Eu(III), Tb(III) and Dy(III) complexes, respectively. Photoluminescence measurement indicates that 1 and 3 emit the characteristic luminescence of Tb(III) and Eu(III) ions in the solid state, respectively. The luminescent spectrum of Eu(III) complex in solvents was also investigated.