Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5399377 | Journal of Luminescence | 2015 | 7 Pages |
Abstract
Using anion ligand phenoxyacetic acid (HPOA) and neutral ligand 2,4,6-tri(2-pyridyl)-s-triazine (TPTZ), two complexes Eu2(TPTZ)2(POA)6·6H2O and EuY(TPTZ)2(POA)6·6H2O have been synthesized and one crystal EuY(TPTZ)2(POA)6·2CH3OH has been obtained. These complexes are characterized by elemental analysis, ICP-AES, IR and UV absorption spectroscopy. The luminescence spectra, luminescence lifetimes and emission quantum efficiencies of the complexes have been studied. The results show that the complex EuY(TPTZ)2(POA)6·6H2O exhibits stronger luminescence intensity, longer luminescent lifetime and higher emission quantum efficiency than Eu2(TPTZ)2(POA)6·6H2O. The single-crystal X-ray diffraction of EuY(TPTZ)2(POA)6·2CH3OH reveals that the crystal is heteronuclear and crystallizes in the triclinic space group P-1 with following unit cell parameters a=12.2411(10) Ã
, b=13.2294(11) Ã
, c=13.5232(11) Ã
, α=74.8596(13)°, β=82.9593(16)°, γ=87.1641(14)°, and V=2097.7(3) Ã
3. Each metal ion coordinates with three nitrogen atoms of one TPTZ and seven oxygen atoms of three POAâ ions. And there exist two coordination forms between POAâ and metal ions in the crystal. One is chelating bidentate, the other is the single-atom bridge.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Ai-Ling Wang, Dan Zhou, Xiao-Yan Wei, Zhong-Xia Wang, Yan-Rong Qu, Hai-Xia Zhang, Ying-Nan Chen, Jing-Jing Li, Hai-Bin Chu, Yong-Liang Zhao,