Synthesis, characterization and luminescence properties of N,N'-bis(2-pyridinecarboxamide-1-N-oxide)-1,2-ethane and corresponding lanthanide(III) complexes

被引:9
作者
Zhang, Hai-Jun [1 ]
Li, Gang [1 ]
Yan, Lan [1 ]
Yang, Ru-Dong [1 ]
机构
[1] Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Peoples R China
关键词
lanthanide compounds; N,N'-bis(2-pyridinecarboxamide-1-N-oxide)-1,2-ethane metal complexes; luminescence property; phosphorescence; triplet energy level; pyridine-N-oxide group;
D O I
10.1016/j.jlumin.2007.01.015
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Several lanthanide (Ln) complexes (Ln = Eu(III), Gd(III), Tb(III)) with a new ligand NAP-bis(2-pyridinecarboxamide-l-N-oxide)-1,2-ethane (LH2), containing two pyridine N-oxide chromophores and a flexibly connected N,N'-dicarboxamide-1,2-ethane, have been prepared and characterized by elemental analysis, conductivity measurements, IR spectra and thermal studies. The luminescence properties of the series of lanthanide complexes in solid state were investigated. Also, we compared the relative fluorescent intensities of these complexes with corresponding complexes with nonoxide derivative NAP-bis(2-pyridinecarboxamide)-1,2-ethane (L'H-2). The results have shown that pyridine-N-oxide group is an excellent sensitizer to lanthanide luminescence over pyridine group. (c) 2007 Published by Elsevier B.V.
引用
收藏
页码:316 / 320
页数:5
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