Disaggregation of Zinc Tetra(4-Carboxyphenoxy) Phthalocyaninate in Aqueous Solutions of Dodecyl-, Tetradecyl-, and Hexadecyltrimethylammonium Bromides at pH 6–9

The aggregation of zinc tetra(4-carboxyphenoxy) phthalocyaninate, ZnPc(COOH) 4 , in organic solvents and water at different pH values has been analyzed using electronic absorption and luminescence spectroscopies. It has been found that, in aqueous systems at pH 6–9, ZnPc(COOH) 4 exists in an aggrega...

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Bibliographic Details
Published in:Colloid journal of the Russian Academy of Sciences 2019-11, Vol.81 (6), p.711-719
Main Authors: Movchan, T. G., Chernyad’ev, A. Yu, Plotnikova, E. V., Tsivadze, A. Yu, Baulin, V. E.
Format: Article
Language:English
Subjects:
Aqueous solutions
Bromides
Chemistry
Chemistry and Materials Science
Dimethyl sulfoxide
Oxygen
Photodynamic therapy
Polymer Sciences
Surfaces and Interfaces
Thin Films
Zinc
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Summary:The aggregation of zinc tetra(4-carboxyphenoxy) phthalocyaninate, ZnPc(COOH) 4 , in organic solvents and water at different pH values has been analyzed using electronic absorption and luminescence spectroscopies. It has been found that, in aqueous systems at pH 6–9, ZnPc(COOH) 4 exists in an aggregated state, while it forms molecular solutions in dimethylformamide and dimethyl sulfoxide. The use of cationic surfactants (dodecyl-, tetradecyl-, and hexadecyltrimethylammonium bromides) causes the disaggregation of ZnPc(COOH) 4 into individual molecules in aqueous solutions at pH ≥ 6. This opens up possibilities of applying ZnPc(COOH) 4 as a preparation for photodynamic therapy in physiological solutions, because each molecule of this compound may participate in the generation of singlet molecular oxygen.
ISSN:1061-933X
1608-3067
DOI:10.1134/S1061933X19060127