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Formation of J-Aggregates of the 21-Thia-5,10,15,20-Tetra-(4-Sulfonatophenyl)-Porphyrin in Water Solutions
https://doi.org/10.47612/0514-7506-2022-89-2-177-183
Abstract
The formation of J-aggregates of 21-thia-5,10,15,20-tetra-(4-sulfonatophenyl)-porphyrin in acidified water solutions is herein revealed for the first time and their spectral-luminescent properties are measured. It is shown that the spectral-luminescent properties of J-aggregates are due to the excitonic interactions, and the number of coherent interacting monomeric porphyrin molecules in the aggregate is evaluated. It is found that J-aggregates of heteroporphyrin have fluorescence, and the fluorescence quantum yield Фfl is found to be as low as 1.8 × 10–4. The photolability of J-aggregates is found, namely, upon J-aggregate photoexcitation to the absorption band at 503 nm they collapse to the monomeric doubly protonated molecules. The process of photomonomerisation is reversible: upon keeping the solution in the dark, J-aggregates form again.
About the Authors
A. D. Melnik
Belarusian State Technological University
Belarus
Belarus
Minsk
T. S. Zhebit
Belarusian State Technological University
Belarus
Belarus
Minsk
A. B. Krylov
Belarusian State Technological University
Belarus
Belarus
Minsk
S. G. Pukhovskaya
Ivanovo State University of Chemistry and Technology
Russian Federation
Russian Federation
Ivanovo
Yu. B. Ivanova
Ivanovo State University of Chemistry and Technology;
G. A. Krestov Institute of Solution Chemistry of Russian Academy of Sciences
Russian Federation
Russian Federation
Ivanovo
M. M. Kruk
Belarusian State Technological University
Belarus
Belarus
Minsk
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Review
For citations:
Melnik A.D., Zhebit T.S., Krylov A.B., Pukhovskaya S.G., Ivanova Yu.B., Kruk M.M. Formation of J-Aggregates of the 21-Thia-5,10,15,20-Tetra-(4-Sulfonatophenyl)-Porphyrin in Water Solutions. Zhurnal Prikladnoii Spektroskopii. 2022;89(2):177-183. (In Russ.) https://doi.org/10.47612/0514-7506-2022-89-2-177-183
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