具有磁弛豫和荧光性能的氮氧自由基-稀土离子环形双核
Magnetic relaxation and luminescent behavior in nitronyl nitroxide-based annuluses of rare-earth ions
李弘道 1张胜健 1董红梅1
作者信息
- 1. 太原工业学院化学与化工系,太原 030008
- 折叠
摘要
选用手性氮氧自由基与稀土离子反应,成功组装了2例2p-4f异自旋内消旋配合物[Ln(hfac)3((R)-MePP-Ph-NIT)]2,其中Ln=Eu(1)、Dy(2),hfac=六氟乙酰丙酮,(R)-MePP-Ph-NIT=2-(4-((R)-tert-butyl-2-methylpiperazine-1-carboxy late)phenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide.在配合物中,氮氧自由基配体连接2个稀土离子形成环形双核结构.配合物1展现出铕离子的特征荧光.在配合物2中,磁弛豫相关的频率依赖的虚部信号说明了其单分子磁体的特性.
Abstract
Employing the reaction of chiral nitronyl nitroxide radical and rare-earth ions,two 2p-4fhetero-spin meso complexes[Ln(hfac)3((R)-MePP-Ph-NIT)]2,where Ln=Eu(1)and Dy(2),hfac=hexafluoroacetylacetone;(R)-MePP-Ph-NIT=2-(4-((R)-tert-butyl-2-methylpiperazine-1-carboxylate)phenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide.have been assembled.In both complexes,two chiral radicals ligate to two Ln(Ⅲ)ions to produce a cyclic dinu-clear structure.Complex 1 shows the characteristic fluorescence emission of the Eu(Ⅲ)ion.In complex 2,the frequency-dependent out-of-phase susceptibility signals connected with magnetic relaxation confirm single-molecule magnet(SMM)behavior.CCDC:2304262,1;2304263,2.
关键词
氮氧自由基/单分子磁体/稀土离子/2p-4f异自旋Key words
nitronyl nitroxide/single-molecule magnet/rare-earth ion/2p-4f hetero-spin引用本文复制引用
基金项目
山西省基础研究项目(自由探索类)(20210302124460)
出版年
2024
NETL
NSTL
维普
万方数据