Synthesis, structure and magnetic properties of an inorganic–organic hybrid compound
Synthesis, structure and magnetic properties of an inorganic–organic hybrid compound
复制标题
DOI：
10.1039/b614186b
复制
发表时间：
2007-02
影响因子：
--
通讯作者：
S. Mandal;M. Green;S. Pati;S. Natarajan
中科院分区：
文献类型：
--
作者：
S. Mandal;M. Green;S. Pati;S. Natarajan
$MnC_2O_4、H_3PO_3$、哌嗪和水的混合物在 423 K 下进行 72 小时的水热反应，产生了新的无机-有机杂化相 $[C_4N_2H_{12}][Mn^{II}\hspace{1mm}_2(HPO_3)_2(C_2O_4)]$，I。该结构由以下网络组成： $Mn_2O_{10}$ 二聚体、$HPO_3$ 伪四面体和草酸盐单元通过其顶点连接，形成具有一维通道的三维结构。在通道中发现质子化的哌嗪分子。仅使用一种类型的次级建筑单元 SBU-4 形成 $Mn(HPO_3)_\infty$ 层是值得注意的。详细的磁学研究表明，反铁磁层以这样的方式耦合，在低温下施加高磁场时表现出磁极化。这是独一无二的，据我们所知，这是首次在开放式框架固体中观察到。
Hydrothermal reaction of a mixture of $MnC_2O_4, H_3PO_3$, piperazine and water at 423 K for 72h resulted in a new inorganic–organic hybrid phase, $[C_4N_2H_{12}][Mn^{II}\hspace{1mm}_2(HPO_3)_2(C_2O_4)]$, I. The structure comprises a network of $Mn_2O_{10}$ dimers, $HPO_3$ psuedo-tetrahedra and oxalate units, connected through their vertices forming a three-dimensional structure with one-dimensional channels. Protonated piperazine molecules are found in the channels. The formation of $Mn(HPO_3)_\infty$ layers using only one type of secondary building unit, SBU-4, is noteworthy. Detailed magnetic investigations reveal that the antiferromagnetic layers are coupled in such a way to show magnetic polarizations on application of high magnetic field at low temperatures. This is unique and to the best of our knowledge has been observed for the first time in an open-framework solid.