A unique 2D framework containing linear trimeric cobalt(II) of mixed Td-Oh-Td geometries linked by two different single-carboxylate-aromatic amine ligands: structure and magnetic properties.
A unique 2D framework containing linear trimeric cobalt(II) of mixed Td-Oh-Td geometries linked by two different single-carboxylate-aromatic amine ligands: structure and magnetic properties.
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DOI：
10.1039/b718928a
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发表时间：
2008-04
影响因子：
4
通讯作者：
Min-Xia Yao;Ming‐Hua Zeng;Huahong Zou;Yanling Zhou;H. Liang
中科院分区：
文献类型：
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作者：
Min-Xia Yao;Ming‐Hua Zeng;Huahong Zou;Yanling Zhou;H. Liang
一种新的二维配位聚合物Co_3（OH）_2（pa）_2（ina）_2（1，pa = 3-（1H-苯并咪唑-2-基）丙酸羧酸酯，ina =异烟酸酯），含有不常见的Td-Oh-Td混合构型的线性Co（ii）三聚体，在20 K以下表现出自旋倾斜。这样的磁性行为主要是由于Dzyaloshinski-Moriya相互作用从各向异性，混合几何形状的三聚体Co（II）离子到基于Co（II）-羧酸盐三聚体的结合模式的性质和1的intertrimers排列的效果的折叠的2D网络。混合单羧酸-芳香胺配体桥联金属体系显示了一个新的结构验证的厚2D层的例子，也表明具有Td-Oh-Td混合几何形状的homopolysaccharide Co（II）簇可以导致相对明显的非补偿矩，根据不同的有效自旋的Co（II）在非常低的温度下，尽管反铁磁簇内相互作用。
A new 2D coordination polymer Co3(OH)2(pa)2(ina)2 (1, pa = 3-(1H-benzimidazol-2-yl) propanoic carboxylate, ina = isonicotinate) contained uncommon, linear Co(ii) trimers of mixed Td-Oh-Td geometries, exhibits spin canting below 20 K. Such magnetic behavior mainly arises from the Dzyaloshinski-Moriya interaction from the anisotropic, mixed geometries trimeric Co(II) ions to the crimpled 2D network based on the nature of the binding modes of Co(II)-carboxylate trimer and the effect of the intertrimers arrangement of 1. The mixed single-carboxylate-aromatic amine ligands bridged metal systems display a new structurally authenticated example of a thick 2D layer, and also indicate homometallic Co(II) clusters with Td-Oh-Td mixed-geometries can result in relatively obvious noncompensation moments, according to different efficient spins of Co(II) at very low temperature, in spite of antiferromagnetic intracluster interactions.