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Two New Iron Coordination Polymers Based on Fe-pyta Chains Incorporating Pyridine-2,4,6-tricarboxylate


  Reaction of FeCl2·6H2O,pyridine-2,4,6-tricarboxylic acid(H3pyta) and NaOH in the hydrothermal system at 185 oC resulted in the formation of 1D coordination polymer[Fe(Hpyta)(H2O)2](1) based on Fe-Hpyta chains. When the abpt[abpt=4-amino-3,5-bis(4-pyridyl)-1,2,4-triazole] ligand was employed in the reaction system,a 3D supramolecular porous network (H2bpt)[Fe(pyta)(H2O)2]·4H2O(2) was obtained. The framework was constructed with negative (Fe-pyta)-chains and the positive H2bpt+ in situ,formed from the abpt reagent,to form 1D channels filled with guest water molecules via hydrogen-bonds. X-Ray diffraction crystal structure analysis shows that complex 1 crystallized in the monoclinic system,space group C2/c,a=1.1490(5) nm,b=0.9008(4) nm,c=1.0058(5) nm,β=107.254(9)o,V=0.9942(8) nm3,Z=4; and complex 2 crystallizes in the triclinic system,space group P1 with a=0.90392(11) nm,b=0.96027(11) nm,c=1.55540(18) nm,α=73.558(2)o,β= 86.126(2)o,γ= 68.745(2)o,V=1.2059(2) nm3 and Z=2.……