氰基桥联的Fe2Ni双之字链的合成与磁性（英文）

Synthesis and Magnetism of Cyano-Bridged Fe2Ni Double-Zigzag Chains

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FeⅢ2NiⅡ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。

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. CCDC: 1904149, 1;1904150, 2;1904151, 3.