Novel coordination polymers with ferrocene-containing dicarboxylate ligand: Syntheses, crystal structures and properties

摘要

A new ferrocene-containing dicarboxylate ligand, L=5-ferrocene-1,3-benzenedicarboxylic acid, has been prepared. Self-assembly of L, M(II) salts (M=Co and Zn) and chelating ligands dpa or phen (dpa=2,2'-dipyridylamine and phen=1,10-phen) gave rise to four new coordination polymers {[Co(L) (dpa)] center dot 2MeOH}(n) (1), {[Zn(L)(dpa)] center dot 2MeOH}(n) (2), {[Co(L)(phen)(H2O)] center dot MeOH} (3), [Zn(L)(phen) (H2O)] center dot MeOH (4). The isostructural complexes 1 and 2 possess 1D helical chain structures with 2(1) screw axes along the b-direction, and the right-and left-handed helical chains are alternate arrayed into 2D layer structures through hydrogen-bonding interactions; while isostructural complexes 3 and 4 are 1D linear chain structures with phen and ferrocene groups of L as pendants hanging on the different sides of the main chain. A structural comparison of complexes 1-4 demonstrated that the characteristics of subsidiary ligands and slight difference in coordination models of L play very important role in the construction of the complexes. In addition, the redox properties of complexes 1-4, as well as the magnetic properties of complexes 1 and 3 are also investigated. (C) 2008 Published by Elsevier B. V.