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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Coordination polymers of Mn ~(2+) and Dy ~(3+) ions built with a bent tricarboxylate: Metamagnetic and weak anti-ferromagnetic behavior
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Coordination polymers of Mn ~(2+) and Dy ~(3+) ions built with a bent tricarboxylate: Metamagnetic and weak anti-ferromagnetic behavior

机译:用弯曲的三羧酸盐构建的Mn〜(2+)和Dy〜(3+)离子的配位聚合物:弱磁和反铁磁行为

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Two new coordination polymers have been synthesized with Mn ~(2+) and Dy ~(3+) ions using a new bent ether-bridged tricarboxylic acid ligand, o-cpiaH _3 (5-(2-carboxy-phenoxy)-isophthalic acid). The ligand readily reacts with a Mn ~(2+) salt in presence of pyridine (py) under hydrothermal condition to afford a 3D coordination polymer {[Mn _9(o-cpia) _6(py) _3(3H _2O)]·H _2O} _n (1), that contains two types of polymeric chains. One of them is merely carboxylate bridged Mn 2+ where each metal ion shows both penta- and hexa-coordination. The other chain consists of carboxylate-bridging along with terminally bound pyridines providing both penta- and hexa-coordination to each metal ion. When o-cpiaH _3 is treated with Dy(NO _3) _3.xH _2O under solvothermal condition, it gives rise to an unusual double layer (6,6) connected 2D coordination polymer {[Dy(o-cpia)]} _n(2), where each metal ion is hexacoordinated. The double layer 2D sheets are stacked to each other in AA? fashion through strong C-H?π interactions to generate an overall 3D supramolecular architecture. Both the complexes have been characterized by single crystal X-ray diffraction, IR spectroscopy, thermogravimetry and elemental analysis. Variable temperature magnetic susceptibility measurements indicate that 1 exhibits metamagnetic behavior while 2 shows weak antiferromagnetic behavior.
机译:使用一种新的弯曲的醚桥三羧酸配体o-cpiaH _3(5-(2-羧基-苯氧基)-间苯二甲酸),已合成了两种新的配位聚合物,其中Mn〜(2+)和Dy〜(3+)离子)。在水热条件下,吡啶在吡啶(py)存在下,配体容易与Mn〜(2+)盐反应,得到3D配位聚合物{[Mn _9(o-cpia)_6(py)_3(3H _2O)]·H _2O} _n(1),其中包含两种类型的聚合物链。其中之一仅仅是羧酸根桥联的Mn 2+,其中每种金属离子均显示五配位和六配位。另一条链由羧酸盐桥联以及末端键合的吡啶组成,吡啶为每个金属离子提供五配位和六配位。在溶剂热条件下用Dy(NO _3)_3.xH _2O处理o-cpiaH _3时,会产生一个不寻常的双层(6,6)连接的2D配位聚合物{[Dy(o-cpia)]} _n( 2),其中每个金属离子都是六配位的。双层2D片在AA中彼此堆叠。通过强大的C-H?π相互作用形成整体3D超分子体系结构。两种配合物均已通过单晶X射线衍射,红外光谱,热重分析和元素分析进行​​了表征。可变温度磁化率测量表明1表现出亚磁行为,而2表现出弱的反铁磁行为。

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