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Chemical structures of the phthalocyanine dye (A) and azo dyes (B through E) used. (A) RB38 (Me = Ni, R = −SO3H or −NH-D, D = phenylene unit with reactive group) and RB15 (Me = Cu, R = −SO3Na or −SO2-NH-C6H3SO3Na-NH-C3N3ClNH2). (B) RV5. (C) RB5 (D) RO96 (E) RR198.
