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Thermochemistry of the Dissolution of Tetra-4-(4'-carboxyphenyoxy)- and Tetra-4-(4'-carboxyphenylthio)phthalocyanines of Copper in Aqueous Solutions of KOH at 298.15 K

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Abstract

The authors obtain complexes CuPc(4-S-C6H4-COOH)4 and CuPc(4-O-C6H4-COOH)4 that are insoluble in water. The standard enthalpies of formation of these compounds are calculated using additive groups based on group systematics with Benson-type classification of fragments, allowing for the influence of the atoms’ primary environment. Thermal effects of the dissolution of crystalline phthalocyanines in aqueous solutions of various KOH concentrations at a temperature of 298.15 K were determined via direct calorimetry. Thermal effects of the stepwise dissociation of CuPc(4-S-C6H4-COOH)4, CuPc(4-O-C6H4-COOH)4 are calculated using the HEAT computer program. Standard enthalpies of formation are calculated for products of the dissociation of CuPc(4-S-C6H4-COOH)4 and CuPc(4-O-C6H4-COOH)4 in an aqueous solution.

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Fig. 1.
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Funding

This work was performed on equipment at the Research Institute of Thermodynamics and Kinetics of Chemical Processes as part of State Task no. FZZW-2023-0008 for the Ivanovo State University of Chemistry and Technology. It was financed by the RF Ministry of Science and Higher Education, grant no. 075-15-2021-671.

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Authors and Affiliations

  1. Ivanovo State University of Chemical Technology, 153000, Ivanovo, Russia

    O. N. Krutova, V. E. Maizlish, V. V. Chernikov, T. V. Tikhomirova & P. D. Krutov

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  1. O. N. Krutova
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  2. V. E. Maizlish
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  3. V. V. Chernikov
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  4. T. V. Tikhomirova
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  5. P. D. Krutov
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Correspondence to P. D. Krutov.

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Translated by Sh. Galyaltdinov

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Krutova, O.N., Maizlish, V.E., Chernikov, V.V. et al. Thermochemistry of the Dissolution of Tetra-4-(4'-carboxyphenyoxy)- and Tetra-4-(4'-carboxyphenylthio)phthalocyanines of Copper in Aqueous Solutions of KOH at 298.15 K. Russ. J. Phys. Chem. 97, 1142–1147 (2023). https://doi.org/10.1134/S0036024423060134

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