氰基桥联的Fe2Ni双之字链的合成与磁性 |
Synthesis and Magnetism of Cyano-Bridged Fe2Ni Double-Zigzag Chains |
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摘要: 利用四氰基构筑单元和不同位阻的吡啶类配体,合成了3例氰基桥联的Fe2ⅢNiⅡ链状化合物。化合物{[Fe(bpy)(CN)4]2[Ni(bp)2]·2H2O}n(1)(bpy=2,2'-联吡啶;bp=4-苯基吡啶),{[Fe(bpy)(CN)4]2[Ni(papy)2]·H2O}n(2)(papy=4-(苯基氮烯)吡啶)和{[Fe(bpy)(CN)4]2[Ni(azp)]·4H2O}n(3)(azp=1,2-二(吡啶-4-基)二氮烯)均为双之字型的链状结构。磁性测试表明化合物1~3均表现为链内的铁磁相互作用。化合物1表现出单链磁体行为,有效能垒为10.9 K。 |
关键词: 氰基桥联 双之字链 铁磁性 单链磁体。 |
基金项目: 国家自然科学基金(No.21871039,21801037)资助项目。 |
Abstract: Three cyano-bridged Fe2Ni chain compounds were synthesized via the reaction of tetracyanometallate building block and pyridine ligands with different steric hindrance. Compounds {[Fe(bpy)(CN)4]2[Ni(bp)2]·2H2O}n (1) (bpy=2,2'-bipyridine; bp=4-phenylpyridine), {[Fe(bpy)(CN)4]2[Ni(papy)2]·H2O}n (2) (papy=4-(phenyldiazenyl)pyridine) and {[Fe(bpy)(CN)4]2[Ni(azp)]·4H2O}n (3) (azp=1,2-di(pyridin-4-yl)diazene) all show double-zigzag chain-like structures. Magnetic study indicates that compounds 1~3 all show intrachain ferromagnetic interactions. Alternating current susceptibility measurements demonstrated the single-chain magnet behavior of compound 1 with the relaxation energy barrier Ea/kB of 10.9 K. |
Keywords: cyano-bridged double-zigzag chain ferromagnetic single-chain magnets |
投稿时间:2019-03-20 修订日期:2019-06-30 |
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贺艳丽,孟银杉,孙慧莹,姜文静,矫成奇,刘涛.氰基桥联的Fe2Ni双之字链的合成与磁性[J].无机化学学报,2019,35(9):1570-1578. |
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