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首页> 外文期刊>RSC Advances >Syntheses of four porous 3-D Cd(ii) metal–organic frameworks from a new multidentate ligand 5-(imidazol-1-yl)-N′-(pyridin-4-ylmethylene) nicotinohydrazide and their characterization and adsorption properties
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Syntheses of four porous 3-D Cd(ii) metal–organic frameworks from a new multidentate ligand 5-(imidazol-1-yl)-N′-(pyridin-4-ylmethylene) nicotinohydrazide and their characterization and adsorption properties

机译：来自新的多孔配体5-（Imidazol-1-基）-N' - （吡啶-4-基甲基）烟嗪的四个多孔3-D CD（II）金属 - 有机骨架及其表征及吸附性能

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摘要

Herein, a new multidentate ligand, 5-(imidazol-1-yl)- N′- (pyridin-4-ylmethylene) nicotinohydrazide ( L ), with an acylhydrazone group was synthesized and characterized. Subsequently, four porous Cd( II )-MOFs, i.e. [Cd( L )(NO _(3) )] _( n ) ( 1 ), [Cd( L )Cl] _( n ) ( 2 ), [Cd( L )Br] _( n ) ( 3 ), and [Cd( L )I] _( n ) ( 4 ), were assembled using the ligand L by a solvothermal method and characterized by single-crystal X-ray diffraction, infrared spectroscopy, thermogravimetric analysis, and powder X-ray diffraction. Structural analysis shows that the coordination environments around Cd( II ) in all the four compounds are different due to the different coordinated anions. Among them, the coordination geometries and the arrangement of five-coordinated groups of the compound 1 containing the coordinated NO _(3) ~(?) anions are significantly different from those of the other three compounds containing halides. However, all the four MOFs have similar one-dimensional rhombic channels. In these channels, both the nitrate ions and the halide ions are attached to the inner walls of the pores. The CO _(2) adsorption properties of 1–4 were studied at 273 K, and the results showed that these compounds exhibit different adsorption capacities for CO _(2) due to the presence of different ions in their pores.
机译：在此，合成和表征了具有酰腙基的新的多夜配体，5-（咪唑-1-基） - N'-（吡啶-4-基甲基）烟酰肼（L）。随后，四个多孔CD（II）-MOFS，即[Cd（1）（NO _（3））] _（N）（1），[CD（1）Cl] _（N）（2），[CD （L）Br] _（n）（3），和[Cd（1）I] _（n）（4）通过溶剂热法使用溶剂L组装，并通过单晶X射线衍射特征，红外光谱，热重分析和粉末X射线衍射。结构分析表明，由于各种协调阴离子，所有四种化合物中的CD（II）周围的协调环境不同。其中，配位几何形状和五个配位的化合物1的排列含有配位NO _（3）〜（α）阴离子的含有卤化物的其他三种化合物的组合物显着不同。然而，所有四个MOF都有类似的一维菱形通道。在这些通道中，硝酸根部和卤离子都连接到孔的内壁上。在273k中研究了1-4的CO _（2）吸附性能，结果表明，由于其孔中不同离子存在，这些化合物对CO _（2）具有不同的吸附能力。

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