Structural Diversity of Cadmium(II) Coordination Polymers Induced by Tuning the Coordination Sites of Isomeric Ligands
作者:Bo Liu、Hui-Fang Zhou、Lei Hou、Jian-Ping Wang、Yao-Yu Wang、Zhonghua Zhu
DOI:10.1021/acs.inorgchem.6b01416
日期:2016.9.6
positional isomeric asymmetrical pyridyldicarboxylatic acids with Cd(NO3)2 generated four new coordination polymers, [Cd(L1)(DMF)3]·DMF·H2O (1), [H2N(CH3)2]2[Cd(L2)2]·3DMF·H2O (2), [Cd(L3)(H2O)2] (3), and [Cd(L4)]·1.5DMF (4), where DMF = N,N-dimethylformamide, H2L1 = 2-(3′-carboxylphenyl)isonicotinic acid, H2L2 = 2-(4′-carboxylphenyl)isonicotinic acid, H2L3 = 5-(3′-carboxylphenyl)nicotic acid, and H2L4
当配体的配位点发生位移时,四种位置异构的不对称吡啶基二羧酸与Cd(NO 3)2的溶剂热反应生成了四种新的配位聚合物[Cd(L1)(DMF)3 ]·DMF·H 2 O(1),[H 2 N(CH 3)2 ] 2 [Cd(L2)2 ]·3DMF·H 2 O(2),[Cd(L3)(H 2 O)2 ](3)和[Cd( L4)]·1.5DMF(4),其中DMF = N,N-二甲基甲酰胺,H 2L1 = 2-(3'-羧基苯基)异烟碱酸,H 2 L2 = 2-(4'-羧基苯基)异烟碱酸,H 2 L3 = 5-(3'-羧基苯基)烟碱酸,H 2 L4 = 2- (3'-吡啶基)对苯二甲酸。图1示出了稀有的2D织物结构。图2公开了具有杂手性螺旋链的栅格层结构,其中三组层在不同方向上堆叠,从而提供了具有3D相交的多孔系统的前所未有的2D + 2D + 2D→3D聚串联构架。图3还显示了具有强的层内π··π相互作用和层间氢键的2D层。4包含稀有Cd