Water-soluble phthalocyanine dye
AssigneeNational Institute for Materials Science
InventorsHiroaki Isago, Yutaka Kagaya, Youichi Oyama, Harumi Fujita
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Abstract
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 10−5 M. 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.
Claims1
A water-soluble phthalocyanine dye, characterized by having a sulfuric acid group or groups as an axial ligand or ligands of an antimony/phthalocyanine complex.
Dependencies are inferred from the claim text.