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

作　　者：李弘道 张胜健 董红梅 LI Hongdao;ZHANG Shengjian;DONG Hongmei(Taiyuan Institute of Technology,Department of Chemistry and Chemical Engineering,Taiyuan 030008,China)

机构地区：[1]太原工业学院化学与化工系,太原030008

出　　处：《无机化学学报》2024年第5期972-978,共7页Chinese Journal of Inorganic Chemistry

基　　金：山西省基础研究项目-自由探索类(No.20210302124460)资助。

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-carboxylate)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。Employing the reaction of chiral nitronyl nitroxide radical and rare‐earth ions,two 2p‐4f hetero‐spin meso complexes[Ln(hfac)3((R)‐MePP‐Ph‐NIT)]2,where Ln=Eu(1)and Dy(2),hfac=hexafluoroacetylacetone;(R)‐MePPPh‐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 Lnions to produce a cyclic dinuclear structure.Complex 1 shows the characteristic fluorescence emission of the Euion.In complex 2,the frequency‐dependent out‐of‐phase susceptibility signals connected with magnetic relaxation confirm single‐molecule magnet(SMM)behavior.

关 键 词：氮氧自由基 单分子磁体 稀土离子 2p-4f异自旋 

分 类 号：O614.338[理学—无机化学] O614.342[理学—化学]