Organic Carboxylate Ligand Tuned Topological Variations in Three Zn(Ⅱ) Coordination Polymers: Syntheses, Crystal Structures and Photoluminescent Properties

摘要

Three new Zn(Ⅱ) coordination polymers,namely [Zn2(suc)2(bib)2]n·nH2O (1),[Zn(glu)(bib)]n·4nH2O (2),and [Zn(adp)(bib)]n (3) (bib =1,4-bis(N-imidazolyl)butane,H2suc =succinic acid,H2glu =glutaric acid,H2adp =adipic acid) have been hydrothermally synthesized and structurally characterized.Compound 1 features a 3D framework with 4-connected hxg-d topological network,compound 2 is comprised of 2D 44-sql-type sheets,and the adjacent 2D sheets are further packed into a 3D supramolecular architecture via intermolecular hydrogenbonding interactions,and compound 3 is a 3D framework with 4-fold interpenetrating dia topology.The structural comparison of these three compounds demonstrates that the topological variations can be well controlled by employing aliphatic dicarboxylate ligands with different spacer lengths.Moreover,the thermal stabilities and photoluminescent properties of them were also studied in detail.