Syntheses and characterizations of nine coordination polymers of transition metals with carboxylate anions and bis(imidazole) ligands

Nine new compounds, namely CuL1(biim-6)] · H₂O (1), ZnL1(biim-6)] · H₂O (2), MnL1(biim-6)] · H₂O (3), MnL1(biim-4)] (4), Co₂(L2)₂(biim-5)₃ · 6H₂O] · 8H₂O (5), ZnL3(biim-6)] (6), ZnL3(biim-5)] (7), CdL3(biim-5) · 1.5H₂O] · 0.5H₂O (8) and CdL4(biim-6) · 2H₂O] (9) where L1 = oxalate anion, L2 = fumarate anion, L3 = phthalate anion, L4 = p-phthalate anion, biim-4 = 1,1′-(1,4-butanediyl)bis(imidazole), biim-5 = 1,1′-(1,5-pentanedidyl)bis(imidazole) and biim-6 = 1,1′-(1,6-hexanedidyl)bis(imidazole)] were successfully synthesized. Compounds 1–3 are isostructural, and display 2D polymeric structures. Compound 4 shows a threefold interpenetrating diamondoid framework. In compound 5, the anions act as counterions, and the metal cations are bridged by bis(imidazole) ligands to form 1D polymeric chains. Compounds 6–9 show 2D polymeric structures. The magnetic properties for 1, 3 and 4 and luminescent properties for 2 and 6–9 are discussed. Thermogravimetric analyses (TGA) for these compounds are also discussed.