Synthesis of metallo-supramolecular polymers with a bis-ono-tridentate ligand by coordination programming

Article abstract of DOI:10.1246/cl.140253

A novel ONO-type bis-tridentate ligand L1 was synthesized by a diazocoupling reaction of 3,3'-dihydroxybenzidine with 6-octyl-2-naphthol in 58% yield. Azo-hydrazo tautomerization in L1 was indicated by the NMR and IR spectra. The 1:1 complexation of L1 and Mn(III) or Co(II) ions was confirmed by titration experiments at room temperature. Mn-, Co-, and Crbased metallo-supramolecular polymers were prepared via the 1:1 complexation of the ditopic ligand with the metal ions at 100 °C. The Mn- and Cr-based polymers exhibited reversible redox properties.