Synthesis and Characterization of Redox-Active Coordination Polymers Generated from Ferrocene-Containing Bridging Ligands

Coordination polymers showing redox activity have been constructed by using ferrocene-based bidentate ligands, 1,1‘-(4-dipyridinethio)ferrocene (1) and 1,1‘-(2-dipyridinethio)ferrocene (2). The ligand of 1 formed an AgI coordination polymer, 1·AgPF6·(CH3CN)2 (3). This complex showed a 1-D double-chain structure, with a weak interchain Ag···Ag interaction. Combination of 1 with M(hfac)2 (M = Mn, Cu, Zn) afforded 1-D chain complexes, 1·M(hfac)2 (M = Mn (5), Cu (6), Zn (7)). The complex 2·CuPF6 (8) showed a 1-D twisted helix-like chain structure.