Specific features of the interaction between chemical traps and phthalocyanine dyes affecting the measurement of the yield of reactive oxygen speciesстатья

Статья опубликована в высокорейтинговом журнале

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Дата последнего поиска статьи во внешних источниках: 12 августа 2020 г.

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[1] Specific features of the interaction between chemical traps and phthalocyanine dyes affecting the measurement of the yield of reactive oxygen species / D. A. Gvozdev, A. A. Ramonova, E. G. Maksimov, V. Z. Paschenko // Dyes and Pigments. — 2020. — Vol. 181. — P. 108538. Indirect probing of reactive oxygen species (ROS) based on chemical traps is widely used for measuring the yield of ROS generated by photosensitizers in solution. Despite the generally satisfactory estimation of the ROS yield using this approach, its limitations should be considered. Namely, errors in the measured value of the ROS yield can be due to direct interactions between the chemical trap and the photosensitizer leading to changes in the spectral characteristics of the chemical trap and the photophysical properties of the photosensitizer. In this work, we focus on such interactions and show that coordination and electrostatic interactions between the chemical traps (α, ά-(anthracene-9,10-diyl)sodium bismethylmalonate, nitrosodimethylaniline–imidazole, and dihydrorhodamine 123) and charged zinc or aluminum phthalocyanines are possible in aqueous solutions. As a result, the ROS yield values measured using the three methods are different for the same phthalocyanine. We also show how the experimental conditions can be optimized to improve the accuracy of measurement of the ROS yield. [ DOI ]

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