National Institute for Materials Science

National Research Institute for Metals

Hiroaki Isago

Yutaka Kagaya

Youichi Oyama

Md Hasan Zahir

Harumi Fujita

The invention has for its object to provide a water-soluble phthalocyanine dye unlikely to lose its own properties even upon dissolved in a concentration as high as 10M. The inventive water-soluble phthalocyanine dye is characterized by having a sulfuric acid group or groups as an axial ligand or ligands of an antimony/phthalocyanine complex. The sulfuric acid group or groups have been introduced by replacing a part or the whole of hydroxyl groups in the starting material with a sulfuric acid group or groups.

Water-soluble phthalocyanine dye

A phthalocyanine radical anion stable in ambient atmosphere, which is formed by subjecting a salt containing dihalogeno(phthalocyaninato)antimony (V) cation to a one-electron reduction. According to the present invention, a phthalocyaninc radical stable in ambient atmosphere, which is expected to be developed as an n-type organic semiconductor, is provided.

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Tsukuba, Japan

Hiroaki Isago