Structure and magnetism of carboxylate/EO-azido-mixed-ligands bridged CuII systems

Using two structurally related benzoates bearing different H-bond acceptors as co-ligands, three new azido-CuII compounds, Cu(L¹)(N₃)(H₂O)]n (1), Cu(L¹)(N₃)(MeOH)]n (2), and CuL²HL²(N₃)₃(H₂O)]n (3) (HL1 = 4-nitrobenzoic acid; HL² = 2-phenyl-4-quinolinecarboxylic acid), have been synthesized and structurally characterized. 1 is a carboxylate/EO-azido bridged copper chain, forming 3D structure by H-bonds, and 2 has a similar chain structure as 1 but forming a 2D structure by H-bonds, while 3 is a 3D su-pramolecular network with ternary center H-bonds. Magnetic study indicates that domain ferromag-netic coupling interactions were found to exist in complexes 1 and 3.