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

Nine new compounds, namely [CuL1(biim-6)] center dot H2O (1), [ZnL1(biim-6)] center dot H2O (2), [MnL1(biim-6)] center dot H2O (3), [MnL1(biim-4)] (4), [CO2(L2)(2)(biim-5)(3) center dot 6H(2)O] center dot 8H(2)O (5), [ZnL3(biim-6)] (6), [ZnL3(biim-5)] (7), [CdL3(biim-5) center dot 1.5H(2)O] center dot 0.5H(2)O (8) and [CdL4(biim-6) center dot 2H(2)O] (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)I 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 I D 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. (C) 2008 Elsevier Ltd. All rights reserved.