五核簇{Dy_2Ni_3}配合物的合成、晶体结构及磁学性质

Synthesis,Crystal Structure and Magnetic Properties of Five-core Cluster {Dy_2Ni_3} Compound

利用2-[(2-羟基-3-甲氧基)苄亚甲基氨基]苯甲酸(H_2L)作为配体,以Dy(NO3)3·6H_2O和Ni(CH_3COO)2·4H_2O为金属盐,通过水热法,合成了一种新的异金属五核簇[Dy_2Ni_3(C_(15)H_(11)NO_4)_2(NO_3)_4(Ac)_2(OH)_2(CH_3CN)_4(CH_3OH)_2]配合物1。单晶X射线衍射结果表明,配合物1属于三斜晶系,P-1空间群,晶胞参数a=1. 0978 (6)nm,b=1. 2057 (7) nm,c=1. 2144 (7) nm,α=103. 571 (7)°,β=90. 062 (7)°,γ=103. 439 (8)°,V=1. 5171 (14)nm3,Z=1。通过元素分析等方法对配合物1进行结构表征,并对其进行磁性测试。直流磁化率(DC)研究结果表明,配合物1具有微弱的铁磁性质,而交流磁化率(AC)并没有出现依赖于外场频率变化极值的现象表明该配合物在零场下不具有较为明显的单分子磁行为。

A new five-core cluster[Dy 2Ni 3(C 15 H 11 NO 4)2(NO 3)4(Ac)2(OH)2(CH 3CN)4(CH 3OH)2]complex has been synthesized and designed by hydrothermal reactions of 2-[(2-hydroxy-3-methoxybenzylidene)amino]benzoic acid(H 2L)and Dy(NO 3)3·6H 2O,Ni(CH 3COO)2·4H 2O.Results of single crystal X-ray diffraction show that the complex belongs to triclinic system with space group P-1,a=1.0978(6)nm,b=1.2057(7)nm,c=1.2144(7)nm,α=103.571(7)°,β=90.062(7)°,γ=103.439(8)°,V=1.5171(14)nm^3,Z=1.The complex was characterized by a series of analytical techniques.Meanwhile,the magnetic properties of the complex have been investigated.The results of direct current(DC)magnetic susceptibility measurements show that the complex has weak antiferromagnetic properties,and the dynamic(AC)magnetic properties did not display a frequency dependence,indicating that the complex has no obvious single molecular magnetic(SMMs)behaviour under zero field.