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首页> 外文期刊>Crystal growth & design >Organic-inorganic hybrid coordination polymers based on 6-methylpyridine-2,4-dicarboxylic acid n-oxide (MPDCO) ligand: Preparations, interpenetrating structures, and magnetic and luminescent properties
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Organic-inorganic hybrid coordination polymers based on 6-methylpyridine-2,4-dicarboxylic acid n-oxide (MPDCO) ligand: Preparations, interpenetrating structures, and magnetic and luminescent properties

机译：基于6-甲基吡啶-2,4-二羧酸正氧化物（MPDCO）配体的有机-无机杂化配位聚合物：制备，互穿结构以及磁性和发光性质

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摘要

Eight novel coordination polymers based on the 6-methylpyridine-2,4-dicarboxylic acid N-oxide (MPDCO) ligand, [M(MPDCO)(H2O)(x)](n) (M = Mn2+, x = 1 (1); M = Cu2+, x = 2 (2)), [M(MPDCO)(bpy)(H2O)center dot(H2O)](n) (M = Co2+ (3), Ni2+ (4)), [M(MPDCO)(TPB)(0.5)(H2O)center dot(H2O)(x)](n) (M = Co2+(5), Ni2+ (6), Zn2+ (7), Cd2+ (8)) (bpy = 4,4'-bipyridine, TPB = 1,2,3,4-tetra-(4-pyridyl)-butane) have been prepared and structurally characterized. Compounds 1 and 2 are both two-dimensional (2-D) layers, which are further stacked via strong interlayer hydrogen-bond interactions to form three-dimensional (3-D) supramolecular structures. Compounds 3 and 4, which contain 3-fold interpenetrating nets, are isostructural and feature 3-D (10,3)-d open frameworks. In isomorphous compounds 5-8, 2-D sheets with nonequivalent nodes of (4(2)center dot 6(2)center dot 8(2))(4 center dot 6(2))(2) topology were constructed from metal cations, MPDCO, and the four-connecting ligand 1,2,3,4-tetra-(4-pyridyl)-butane (TPB). Then the inclined interpenetration of these 2-D sheets leads to 3-D porous architectures with rhombic channels that embody some disordered water molecules. Dominant antiferromagnetic coupling was observed in compounds 1, 3, and 4. The compounds 7 and 8 both exhibit strong fluorescent emissions in the solid state and may be suitable as candidates of blue-fluorescent materials.
机译：八种基于6-甲基吡啶-2,4-二羧酸N-氧化物（MPDCO）配体的新型配位聚合物[M（MPDCO）（H2O）（x）]（n）（M = Mn2 +，x = 1（1 ）; M = Cu2 +，x = 2（2）），[M（MPDCO）（bpy）（H2O）中心点（H2O）]（n）（M = Co2 +（3），Ni2 +（4）），[M （MPDCO）（TPB）（0.5）（H2O）中心点（H2O）（x）]（n）（M = Co2 +（5），Ni2 +（6），Zn2 +（7），Cd2 +（8））（bpy =已经制备了4,4'-联吡啶，TPB = 1,2,3,4-四-（4-吡啶基）-丁烷）并进行了结构表征。化合物1和2均为二维（2-D）层，它们通过强大的层间氢键相互作用进一步堆叠以形成三维（3-D）超分子结构。包含3互穿网的化合物3和4是同构结构，具有3-D（10,3）-d开放骨架。在同构化合物5-8中，由金属构造了具有（4（2）中心点6（2）中心点8（2））（4中心点6（2））（2）拓扑结构不等价节点的二维薄片阳离子，MPDCO和四连接的配体1,2,3,4-四-（4-吡啶基）-丁烷（TPB）。然后，这些2-D薄片的倾斜互穿会导致带有菱形通道的3-D多孔结构，其中包含一些无序的水分子。在化合物1、3和4中观察到了主要的反铁磁耦合。化合物7和8均在固态下表现出强的荧光发射，并且可能适合用作蓝色荧光材料的候选物。

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