A diazodiphenylene-bridged Cu-phthalocyanine polymer was synthesized from the diazonium salt of bensidine and the Cu(II) 1,8,15,22-tetraaminophthalocyanine complex and characterized with Fourier transform infrared, ultraviolet-visible spectroscopy, and elemental analysis. The polymer was partially soluble in organic solvents such as dimethylformamide and tetrahydrofuran. The molecular weight of the soluble part of the polymer was investigated with ebullioscopy and viscosimetry methods in tetrahydrofuran. Both methods showed that the molecular weight of the polymer was much larger than that of the complex. The conductivity of the samples was measured with a four-prop conductivity measuring device. Iodine and hydrogen chloride were doped to the polymer, and an increase of about 10(4) S cm(-1) in the electrical conductivity was observed. The cyclic voltammogram of the diazodiphenylene-bridged Cu-phthalocyanine polymer in contact with a LiClO4 electrolyte exhibited two reductions and two reoxidations with high reversibility and electrochemical stability. (c) 2006 Wiley Periodicals, Inc.