Synthesis, structure and magnetic properties of organic-intercalated bimetallic molecular-based ferrimagnets (n-CnH2n+1)PPh3MIIFeIII(C2O4)3, (MII = Mn, Fe; n = 3–7)
作者:Ian D. Watts、Simon G. Carling、Peter Day
DOI:10.1039/b107057f
日期:2002.3.26
(n-CnH2n+1)PPh3MIIFeIII(C2O4)3 (n = 3–7, MII = Mn, Fe) were prepared and the structures investigated by powder X-ray diffraction in order to study the evolution of the structure and magnetic properties as a function of alkyl chain length. The compounds all have the same two-dimensional honeycomb structure of MII and FeIII bridged by oxalate, with the organic cations lying between the metal–oxalate layers, whose separation
制备了双金属三草酸酯盐(n -C n H 2 n +1)PPh 3 M II Fe III(C 2 O 4)3(n = 3-7,M II = Mn,Fe),并研究了结构经过粉末X射线衍射 为了研究结构和磁性能随时间的变化 烷基链长。这些化合物都具有由草酸盐桥接的M II和Fe III的相同的二维蜂窝结构,其中有机阳离子位于金属草酸盐层之间, Fe II盐的分离范围为9.48Å(n = 3)至11.10Å(n = 7),Mn II的分离范围为9.37到10.81Å 。这些化合物均表现为亚铁酸盐,其磁参数类似于相应的AM II Fe III(C 2 O 4)3,其中A = NR 4 +,PPh 4 +和T c几乎对层间分离不敏感。Mn II盐在T c和Fe II以下显示出未补偿的磁化强度图中显示了Néel型N亚铁磁性,在低温下具有负磁化强度,由于Fe II子晶格中的空位,其大小受制备条件的影响。