Structural evolution and zero-field SMM behaviour in ferromagnetically-coupled disk-type Co_(7)clusters bearing exclusively end-on azido bridges  

作　　者：Yijia Jiao Yuzhu Li Yuting Zhou Peipei Cen Yi Ding Yan Guo Xiangyu Liu 

机构地区：[1]State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering,College of Chemistry and Chemical Engineering,Ningxia University,Yinchuan 750021,China [2]College of Public Health,College of Basic Medical Science,Ningxia Medical University,Yinchuan 750021,China

出　　处：《Chinese Chemical Letters》2024年第8期567-571,共5页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(NSFC,Nos.21863009,22063008);the Natural Science Foundation of Ningxia Province(Nos.2023AAC03014,2023AAC03227,2021AAC03136,2021BEB04062);the Young Top-notch Talent Cultivation Program of Ningxia Province,the Discipline Project of Ningxia(No.NXYLXK2017A04);the China Postdoctoral Science Foundation(No.2022M723148).

摘　　要：Concise chemistry leads to a family of heptanuclear Co^(Ⅱ)-clusters,[Co_(7)(N_(3))_(12)(CH_(3)CN)_(12)][Y_(2)(NO_(3))_(4)(piv)_(4)]·2CH_(3)CN(DC1)(pivH=pivalic acid),[Co_(7)(N_(3))_(12)(CH_(3)CN)_(10)(NO_(3))_(0.4)(Cl)_(1.6)]·4CH_(3)CN(DC2)and[Co_(7)(N_(3))_(12)(CH_(3)CN)_(10)(NO_(3))_(2)]·4CH_(3)CN(DC3),in which the metal ions are exclusively bridged by end-on azido ligands to stabilize a beautiful disk-like topology.The resulting clusters exhibit interesting structural transformations and thermodynamically-distinct steady states verified by theoretical calcula-tions.Magnetic studies reveal the first observation of zero-field SMM behaviour in disk-like heptanuclear Co^(Ⅱ)complexes.

关 键 词：Multinuclear Co^(Ⅱ)-clusters Disk-like motif Structural modulation Ferromagnetic coupling Zero-field SMM 

分 类 号：O641.4[理学—物理化学]