Solvent-induced deviation in square-grid layers of microporous Cu(II) isophthalates: layer stacking and gas adsorption properties
Solvent-induced deviation in square-grid layers of microporous Cu(II) isophthalates: layer stacking and gas adsorption properties
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DOI：
10.1039/c0ce00150c
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发表时间：
2011
期刊：
影响因子：
3.1
通讯作者：
Ruiqin Zhong;R. Zou;Qiang Xu
中科院分区：
文献类型：
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作者：
Ruiqin Zhong;R. Zou;Qiang Xu
在不同溶剂中，硝酸铜（II）与草酸（H2 IPT）的溶剂热反应生成了五种新型的金属配位聚合物[Cu（IPT）（H2O）]（H2O）2（1），Cu（IPT）（C2 H5 OH）（2），Cu 2（IPT）2（DEF）（H2O）（3）。（DEF = N，N′-二乙基甲酰胺）、[Cu 4（IPT）4（DMF）2（C2 H5 OH）（H2O）]（DMF）2（4）（DMF = N，N′-二甲基甲酰胺）和[Cu 2（IPT）2（CH 3CN）（H2O）]（H2O）2.25（5）。结构分析表明，它们都形成了以桨轮状Cu 2团簇为节点、以螯合物为连接体的二维非互穿正方形网格层，其中各种客体分子通过与开放的刘易斯酸铜位点配位或包含在开放的通道中而被捕获. 2D正方形网格层对各种溶剂分子的不同化学亲和力导致这些2D层的客致偏差和其框架中的不同孔隙率，如通过不同的气体吸附性质实现的。
Solvothermal reactions of Cu(II) nitrate with isophthalic acid (H2IPT) in various solvents create five novel metal coordination polymers, [Cu(IPT)(H2O)](H2O)2 (1), Cu(IPT)(C2H5OH) (2), Cu2(IPT)2(DEF)(H2O) (3) (DEF = N,N′-diethylformamide), [Cu4(IPT)4(DMF)2(C2H5OH)(H2O)](DMF)2 (4) (DMF = N,N′-dimethylformamide), and [Cu2(IPT)2(CH3CN)(H2O)](H2O)2.25 (5), respectively. Structural analyses exhibit that they all form 2D non-interpenetrated square-grid layers based on paddle-wheel Cu2clusters as nodes and isophthalate as linkers, in which various guest molecules are trapped via either the coordination to open Lewis acid copper sites or inclusion in open channels. The different chemical affinities of the 2D square-grid layers toward various solvent molecules result in guest-induced deviation of these 2D layers and diverse porosities in their frameworks, as realized by the distinct gas adsorption properties.