Preparation, electrochemical, and spectroelectrochemical characterization of a new water-soluble copper phthalocyanine

A new water-soluble copper phthalocyanine, 2,9,16,23-tetrakis(4-(1-naphthoxy-4-sulfonic acid sodium salt)) phthalocyaninato copper NhtCuPc, where Nht indicates naphthoxy-4-sulfonic acid sodium salt, was synthesized and its electrochemical and spectroelectrochemical behavior were investigated in DMSO solution. The in situ spectroelectrochemical studies showed that the neutral complex exhibited the characteristic spectral changes corresponding to mono-anionic [NhtCuPc(3-)]− and di-anionic [NhtCuPc(4-)]2− species having long-term stability during reduction processes.