Enhancing blocking temperature using inverse hydrogen bonds for non-radical bridged dimeric Dy(Ⅲ)single-molecule magnets  

作　　者：Peng-Bo Jin Qian-Cheng Luo Ye-Ye Liu Yan-Zhen Zheng 

机构地区：[1]Frontier Institute of Science and Technology,State Key Laboratory of Electrical Insulation and Power Equipment,MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter,Xi’an Key Laboratory of Electronic Devices and Material Chemistry and School of Chemistry,Xi’an Jiaotong University,Xi’an 710054,China

出　　处：《Science China Chemistry》2024年第10期3328-3338,共11页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China(22375157);the State Key Laboratory of Electrical Insulation and Power Equipment(EIPE23402,EIPE23405);the Special Support Plan of Shaanxi Province for Young Top-notch Talent;the Fundamental Research Funds for Central Universities(xtr052023002,xzy012023024);the China Postdoctoral Science Foundation(2023M742783,GZB20240599);the Shaanxi Postdoctoral Science Foundation(2023BSHYDZZ12)。

摘　　要：Single-molecule magnets(SMMs)are a kind of nanosized magnetic materials that are capable of storing massive bytes of information.Strongly coupling the spin centers in a proper manner is a usual approach to promote the working temperature(or blocking temperature)for SMMs.Electron delocalized radicals have been widely employed to accomplish this job.Here,we show a new manner by using weak but multiple B–H^(δ-)···Dy^(3+)inverse hydrogen bonding(IHB)interactions to control the magnetic couplings in a series of dimeric dysprosiacaborane SMMs.This approach leads to a record high T_(B)^(100s)of 10 K among non-radical bridged dimeric SMMs,which is mainly ascribed to strong ferromagnetic coupling(4.38 cm^(-1))and the proper alignment of the magnetic principle axes of the adjacent dysprosium(Ⅲ)ions.In verifying by theoretical calculations,these results demonstrate that IHB interactions can be used to construct strong axial ferromagnetic coupling and enhancing magnetic blocking temperature for SMMs.

关 键 词：single-molecule magnets CARBORANE DYSPROSIUM ferromagnetic coupling inverse hydrogen bond 

分 类 号：TB383.1[一般工业技术—材料科学与工程] O646.8[理学—物理化学]