Chen Xiao-Ming, Liu Gao-Feng
School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China.
Chemistry. 2002 Oct 18;8(20):4811-7. doi: 10.1002/1521-3765(20021018)8:20<4811::AID-CHEM4811>3.0.CO;2-R.
Using three nonlinear dicarboxylates, isophthalate (ipa), 4,4'-oxybis(benzoate) (oba), and ethylenedi(4-oxybenzoate) (eoba), we have prepared five neutral infinite copper(II) dicarboxylate coordination polymers containing lateral aromatic chelate ligands, namely [Cu(ipa)(2,2'-bpy)]n.2nH2O (1), [Cu2(ipa)2(phen)2H2O]n (2), [Cu(oba)(phen)]n (3), [Cu(oba)(2,2'-bpy)]n (4), and [Cu(eoba)(phen)]n (5; 2,2'-bpy = 2,2'-bipyridine, phen = 1,10-phenanthroline) by hydrothermal synthesis. X-ray single-crystal structural analyses of these complexes reveal that the nonlinear flexible or V-shaped dicarboxylates can induce the helicity or flexuousity of the polymeric chains and aromatic chelate ligands are important in providing potential supramolecular recognition sites for pi-pi aromatic stacking interactions. An appropriate combination of the bridging dicarboxylate and aromatic chelate can induce a pair of single-stranded helical or flexuous chains to generate a double-stranded helix or molecular zipper through supramolecular interactions, respectively.
我们使用三种非线性二羧酸盐，间苯二甲酸（ipa）、4,4'-氧双（苯甲酸）（oba）和乙二（4-氧苯甲酸）（eoba），通过水热合成制备了五种含有侧向芳族螯合配体的中性无限铜（II）二羧酸盐配位聚合物，即[Cu(ipa)(2,2'-bpy)]n·2nH2O（1）、[Cu2(ipa)2(phen)2H2O]n（2）、[Cu(oba)(phen)]n（3）、[Cu(oba)(2,2'-bpy)]n（4）和[Cu(eoba)(phen)]n（5；2,2'-bpy = 2,2'-联吡啶，phen = 1,10-菲咯啉）。对这些配合物的X射线单晶结构分析表明，非线性柔性或V形二羧酸盐可诱导聚合物链的螺旋性或弯曲性，芳族螯合配体对于提供π-π芳族堆积相互作用的潜在超分子识别位点很重要。桥连二羧酸盐和芳族螯合配体的适当组合可分别诱导一对单链螺旋或弯曲链通过超分子相互作用生成双链螺旋或分子拉链。
