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取代型杂多化合物可改变多酸化合物的酸碱性、氧化还原性和热稳定性,因而受到关注[1].夹心型化合物是一类新型化合物,具有大的摩尔质量,高的负电荷,且含有多个磁性中心,近年来已引起国内外的兴趣[2].已见报道的以磷为杂原子的夹心型化合物有[M4(H2O)2(PW9O34)2]10-(M=Cu1,Co1,Mn1,Ni1,Zn1)[3]和〔M4(H2O)2(P2W15O56)2]16-(M=Cu1,Co1,Mn1,Ni1,Zn1)[4]系列,它们具有如磁性[5]、催化活性[6]和抗病毒活性[7]等性质.近来我们合成了以砷为杂原子的4:3O系列夹心型化合物[M4(H2O)2(As2W15O56)]16-(M=Cu1,Co1,Mn1,Ni1,Zn1,Cd1),并系统地讨论了结构
Substituted heteropoly compounds can change the acid-base, redox and thermal stability of polyacid compounds, which attracted attention [1]. Sandwich-type compounds are a new class of compounds with large molar mass, high negative charges and multiple magnetic centers. In recent years, they have attracted more and more interest both at home and abroad [2]. It has been reported that the sandwich type compounds containing phosphorus as a hetero atom are [M4 (H2O) 2 (PW9O34) 2] 10- (M = Cu1, Co1, Mn1, Ni1, Zn1) [3] and [M4 (P2W15O56) 2] 16- (M = Cu1, Co1, Mn1, Ni1, Zn1) [4] series have some properties such as magnetism [5], catalytic activity [6] and antiviral activity [7]. Recently, we have synthesized 16: (M = Cu1, Co1, Mn1, Ni1, Zn1, Cd1) 4: 3O series sandwich compounds with arsenic as a heteroatom [M4 (H2O) 2 (As2W15O56)] and systematically discussed structure