Syntheses of four porous 3-D Cd(<scp>ii</scp>) metal–organic frameworks from a new multidentate ligand 5-(imidazol-1-yl)-<i>N′</i>-(pyridin-4-ylmethylene) nicotinohydrazide and their characterization and adsorption properties
作者:Gui-Ying Zhu、Zhenliang Liu、Jia Wang、Xue Niu、Teng Wang、Guo-Xia Jin、Jian-Ping Ma
DOI:10.1039/d0ra05131d
日期:——
Subsequently, four porous Cd(II)-MOFs, i.e. [Cd(L)(NO3)]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
在此,合成并表征了具有酰基腙基团的新型多齿配体 5-(imidazol-1-yl)-N ' - (pyridin-4-ylmethylene) nicotinohydrazide ( L )。随后,四个多孔Cd( II )-MOFs,即[Cd( L )(NO 3 )] n ( 1 )、[Cd( L )Cl] n ( 2 )、[Cd( L )Br] n ( 3 ) , 和 [Cd( L )I] n ( 4 ), 使用配体L组装采用溶剂热法,通过单晶 X 射线衍射、红外光谱、热重分析和粉末 X 射线衍射对其进行表征。结构分析表明,四种化合物中Cd( II )周围的配位环境因配位阴离子的不同而不同。其中,含有配位NO 3 -阴离子的化合物1的配位几何和五配位基团的排列与其他三种含卤化物的化合物有显着差异。然而,所有四个 MOF 都具有相似的一维菱形通道。在这些通道中,硝酸根离子和卤化物离子都附着在孔的内壁上。CO