Eight coordination compounds assembled from unexplored semi-rigid ether-based unsymmetrical tetracarboxylate and various dipyridyl ligands: structural variation, magnetic and photoluminescence properties

摘要: By incorporating a semi-rigid ether-based unsymmetrical tetracarboxylic acid [H4detc = 2,3,3′,4′-diphenyl ether acid] with various ancillary dipyridyl ligands [phen 1,10-phenanthroline, bipy 4,4′-bipyridine, bpea 1,2-bis(4-pyridyl)ethane, and bpee 1,2-bis(4-pyridyl)ethylene], eight new coordination compounds were hydrothermally synthesized. [Mn(H2detc)(phen)2]·H2O (1) [Cd(H3detc)2(bipy)2·H2O]·6H2O (2) are two supramolecular networks built from binuclear mononuclear structures, respectively. [Cd2(detc)(phen)2]·0.5H2O (3) [Zn(H2detc)(bipy)] (4) luminescent 1D loop chain structures [M2(detc)2] metallacycle units. [Ni2(detc)(bpee)2·5H2O]·1.5H2O (5) exhibits 2D fishbone-like double-layered network. [Co2(detc)(bpea)2·H2O] (6) features 3D framework containing [Co2(μ2-COO)(μ2-Ocarboxylate)] chain. [Cu2(detc)(bpee)·2H2O]·4H2O (7) possesses two-fold interpenetration pcu net topology. [Ni2(detc)(bpea)2·3H2O]·3H2O (8) displays three-fold (3,3,4)-connected topological net. Magnetic susceptibility measurements indicate antiferromagnetic exchange interactions between the Co(II) ions in 6. The photoluminescence spectra of 2, 3 4 show corresponding emission bands their ligands.