应用化学2017，Vol.34Issue(9)：1017-1023,7.DOI:10.11944/j.issn.1000-0518.2017.09.170144
单核Ln到异核Ln-M超分子配合物的组装与发光性能
Assembly and Luminescence of Mononuclear Ln to Heteronuclear Ln-M Supramolecular Complexes
摘要
Abstract
Via stepwise assembly method, discrete mononuclear Ln(Ln=Tb/Sm/Yb) complexes were synthesized from 3-or 4-pyridyl modified tripodal ligands, which were then assembled into three dimensional Ln-M(M=Ag or Cd) metal-organic frameworks(MOFs) with different topologies through the linkage of pyridyl ends.The heteronuclear MOFs sustain a characteristic emission of Ln3+ coordination centers, but the energy levels of the ligands are lowered in the three-dimensional packing structures, which affects the energy transfer efficiency to lanthanide centers.As a result, a stronger near-infrared luminescence is obtained in 2-Yb-Ag compared with its mononuclear counterpart, and the decay lifetime increases from 4.3 μs to 6.7 μs.While 4-Tb-Cd simultaneously emits metal-centered and ligand-based emissions, in which the decay lifetime for Tb-centered emission shortens from 2.91 ms to 0.62 ms compared with the corresponding mononuclear complex.关键词
稀土发光/金属-有机框架/异核配合物Key words
lanthanide emission/metal-organic framework/heteronuclear complex分类
化学化工引用本文复制引用
王政,尹少云,潘梅,刘煜,孙思思,王海平,范雅楠,苏成勇..单核Ln到异核Ln-M超分子配合物的组装与发光性能[J].应用化学,2017,34(9):1017-1023,7.基金项目
国家自然科学基金(21373276)和广州市科技计划项目(201510010246, 201504010031)资助Supported by the National Natural Science Foundation of China(No.21373276), the Science and Technology Planning Project of Guangzhou (No.201510010246, No.201504010031) （21373276）
