A low-temperature neutron diffraction study of Mn12-acetate.
A low-temperature neutron diffraction study of Mn12-acetate.
复制标题
Mn12-乙酸盐的低温中子衍射研究。
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
G. Christou
中科院分区：
文献类型：
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作者：
P. Langan;R. Robinson;P. Brown;D. Argyriou;D. Hendrickson;G. Christou
在低温区，其中十二核混价羧酸锰十六乙酸四十二十二氧十二锰二（乙酸）四水合物，[Mn(12)O(12)(C(2)D(3)O(2))(16)(H(2)O)(4)]. 2c (2)HD(3)O(2)。4H(2)O表现出不同寻常的磁性，其结构与之前在室温下确定的结构相似[Lis(1980)]。Acta结晶。[B36, 2042-2046]，不同之处在于其中一个配位乙酸基的构型发生了微小变化，这与额外氢键的形成以及甲基的取向有关。由于该系统的大部分磁化密度驻留在Mn原子上，因此这些重排对化合物磁性能的影响很小。
In the low-temperature region, where the dodecanuclear mixed-valence manganese carboxylate hexadecaacetatotetraaquadodecaoxododecamanganese bis(acetic acid) tetrahydrate, [Mn(12)O(12)(C(2)D(3)O(2))(16)(H(2)O)(4)].2C(2)HD(3)O(2).4H(2)O, displays unusual magnetic properties, its structure is similar to that previously determined at room temperature [Lis (1980). Acta Cryst. B36, 2042-2046], differing only by a small change in the configuration of one of the coordinated acetate groups, related to the formation of additional hydrogen bonds, and by the orientation of the methyl groups. Since most of the magnetization density of this system resides on the Mn atoms, the consequences of these rearrangements for the magnetic properties of the compound are small.