Syntheses and structures of three supramolecular complexes based on 2-(pyridine-2-yl)-1H-imidazole-4,5-dicarboxylic acid

摘要

Three new supramolecular compounds, [Cu(o-HPIDC)(bpy)(H2O)]center dot 2H(2)O 1, [Cu(o-H2PIDC)(phen)Cl]center dot [Cu(phen)(2)Cl]center dot 10H(2)O center dot Cl 2 and {[Cd(o-H2PIDC)(H2O)(2)Cl]center dot H2O}(2) 3 (o-H3PIDC = 2-(pyridine-2-yl)-1H-imidazole-4,5-dicarboxylic acid, bpy = 2,2'-bipyridine, phen = 1,10-phenanthroline), were hydrothermally synthesized and characterized. In compound 1, the adjacent two supramolecular layers are constructed from different types of helical chains with the same pitch. In compound 2, the adjacent 2D water-chloride layers, {[(H2O)(10)Cl](-)}(n), are pillared by [Cu(o-H2PIDC)(phen)Cl] units to form the overall 3D supramolecular network with 1D channels through O-H center dot center dot center dot O hydrogen bond interactions. In compound 3, two Cd(II) are linked into a binuclear [Cd-2(o-H2PIDC)(2)(H2O)(4)Cl-2] with a ten-membered ring by two o-H2PIDC- ligands. The three compounds self-assemble into 3D supramolecular structures via hydrogen bond and pi-pi stacking interactions. The fluorescence properties of compound 3 was also investigated. (C) 2017 Elsevier B.V. All rights reserved.