Two monofluoride-bridged Dy~Ⅲdimers with different magnetization dynamics  

作　　者：Mengmeng Wang Xixi Meng Ning Liu Yi-Quan Zhang Na Xu Wei Shi Peng Cheng 

机构地区：[1]Department of Chemistry,Key Laboratory of Advanced Energy Materials Chemistry(MOE)and Renewable Energy Conversion and Storage Center(RECAST),College of Chemistry,Nankai University,Tianjin 300071,China [2]Jiangsu Key Lab for NSLSCS,School of Physical Science and Technology,Nanjing Normal University,Nanjing 210023,China

出　　处：《Chinese Chemical Letters》2023年第6期454-458,共5页中国化学快报（英文版）

基　　金：supported by the National Key R&D Program of China(No.2018YFA0306002);the National Natural Science Foundation of China(Nos.21971123 and 21973046);the Natural Science Foundation of Tianjin(No.18JCJQJC47200)。

摘　　要：As a monoatomic bridge,fluoride ion can transmit efficient magnetic interaction between lanthanide ions but its effect on tuning the magnetization dynamics has not been well understood.Herein,two monofluoride-bridged dinuclear dysprosium complexes[Dy_(2)F(bbpen)_(2)(Et OH)_(2)]Br·Et OH(1)and[Dy_(2)F(bbppy)_(2)]Br·2Et OH(2)with Dy-F-Dy angles of~178°and their diamagnetic-ion diluted analogues 1'and 2'were synthesized.Magnetic studies reveal that 1 and 1'barely show any magnetization dynamics,but 2 and 2'exhibit strong magnetization dynamics.Systematical experimental analysis combined with ab initio calculations reveals that the different magnetization dynamics between 1 and 2 mainly originate from the effect of magnetic anisotropy by terminal ligand and bridging group of the chelating ligand,and the fluoride bridge can effectively suppress the quantum tunneling of the magnetization and turn on Orbach process in 2.

关 键 词：Fluoride ion bridge Dinuclear Dy~Ⅲcomplexes Magnetization dynamics Single-molecule magnet Suppressing QTM 

分 类 号：O641.4[理学—物理化学]