Heterometallic octanuclear REIII3NiII5 (RE = DyIII, GdIII and YIII) clusters with slow magnetic relaxation for the dysprosium derivative
作者:Huiyu Wang、Hongshan Ke、Shuang-Yan Lin、Yang Guo、Lang Zhao、Jinkui Tang、Yun-Hui Li
DOI:10.1039/c3dt32572e
日期:——
Reactions of rare earth benzoate and nickel perchlorate with a Schiff-base ligand, 2-([(2-hydroxyphenyl)imino]methyl) phenol (H2L), in the presence of triethylamine yielded three heterobimetallic octanuclear clusters of general formula [RE3Ni5L5(PhCOO)3(μ3-OH)5(μ3-OCH3)(CH3OH)4(H2O)]·xCH3OH·yH2O (RE = DyIII, x = 4, y = 4 (1), RE = GdIII, x = 5, y = 4 (2), RE = YIII, x = 5, y = 3 (3)). Single-crystal
稀土苯甲酸酯与 高氯酸镍 带有席夫碱配体 2-([[(2-羟基苯基)亚氨基]甲基)苯酚(H 2 L),在三乙胺得到通式3个的异octanuclear簇[RE 3的Ni 5大号5(PhCOO)3(μ 3 -OH)5(μ 3 -OCH 3)(CH 3 OH)4(H 2 O)]· X CH 3 OH · y H 2 O(RE = Dy III,x = 4,y = 4(1),RE = Gd III,x = 5,y = 4(2),RE = Y III,x= 5,y = 3(3))。X射线单晶衍射表明,每个簇的金属核由两个扭曲的[RE 2 Ni 2 O 4 ]古巴样结构部分和一个异双金属三角形[RE 2 NiO 2 ]单元组成,其中RE离子排列成典型的三角时尚。在2–300 K的温度范围内测量了这些配合物的可变温度固态磁化率,结果表明,对于化合物2和3,金属离子之间的总体铁磁相互作用是有效的。在零外部磁场下,Dy