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- Title
Formation of J-Aggregates of 21-thia-5,10,15,20-tetra-(4-sulfonatophenyl)-porphyrin in Acidified Aqueous Solutions.
- Authors
Melnik, A. D.; Zhebit, T. S.; Krylov, A. B.; Pukhovskaya, S. G.; Ivanova, Yu. B.; Kruk, M. M.
- Abstract
The formation of Jaggregates of 21-thia-5,10,15,20-(tetra-4-sulfonatophenyl)-porphyrin in acidified aqueous solutions is reported for the first time. The spectral-luminescent properties of these species were measured and ascribed to excitonic interactions. The number of coherent interacting monomeric porphyrin molecules in the aggregate was determined. J-Aggregates of this heteroporphyrin were found to fluoresce. The fluorescence quantum yield Φfl was found to be 1.8·10–4. The J-aggregates were found to be photolabile. Upon their photo-excitation to the absorption band at 503 nm, these species collapse to the monomeric doubly-protonated molecules. The photomonomerization process is reversible: the J-aggregates form again upon maintenance of the solution in the dark.
- Subjects
FLUORESCENCE yield; AQUEOUS solutions; METALLOPORPHYRINS
- Publication
Journal of Applied Spectroscopy, 2022, Vol 89, Issue 2, p232
- ISSN
0021-9037
- Publication type
Article
- DOI
10.1007/s10812-022-01348-y