Alginate–Chitosan Polyelectrolyte Complexes As Carriers for Fluorinated Tetraphenylporphyrin in Photosensitizing Systems of Singlet Oxygen Generation

A. S. Kopylov; Копылов А. С.; N. A. Aksenova; Аксенова Н. А.; I. V. Shershnev; Шершнев И. В.; V. A. Timofeeva; Тимофеева В. А.; M. A. Savko; Савко М. А.; A. V. Cherkasova; Черкасова А. В.; T. S. Zarkhina; Зархина Т. С.; P. S. Timashev; Тимашев П. С.; A. B. Solovieva; Соловьева А. Б.

doi:10.31857/S0044453723120178

Alginate–Chitosan Polyelectrolyte Complexes As Carriers for Fluorinated Tetraphenylporphyrin in Photosensitizing Systems of Singlet Oxygen Generation

Authors: Kopylov A.S.¹^,2, Aksenova N.A.¹^,3, Shershnev I.V.¹, Timofeeva V.A.¹, Savko M.A.¹, Cherkasova A.V.¹, Zarkhina T.S.¹, Timashev P.S.¹^,3^,2, Solovieva A.B.¹
Affiliations:
1. Federal Research Center of Chemical Physics, Russian Academy of Sciences
2. Chemistry Department, Moscow State University
3. First Moscow State Medical University
Issue: Vol 97, No 12 (2023)
Pages: 1748-1756
Section: ФИЗИЧЕСКАЯ ХИМИЯ ДИСПЕРСНЫХ СИСТЕМ И ПОВЕРХНОСТНЫХ ЯВЛЕНИЙ
Submitted: 27.02.2025
Published: 01.12.2023
URL: https://ruspoj.com/0044-4537/article/view/669128
DOI: https://doi.org/10.31857/S0044453723120178
EDN: https://elibrary.ru/RUOHLE
ID: 669128

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Abstract

Water-insoluble photosensitizing (PS) systems active in the generation of singlet 1O2 oxygen are obtained by immobilizing fluorinated tetraphenylporphyrin (FTPP) from a solution in acetone on films of polyelectrolyte complexes based on sodium alginate (SA) and chitosan (CT), and on solid water-insoluble gels of alginate and chitosan. The obtained polymer PS systems are used to establish the intensity of the photoluminescence of singlet oxygen in D2O and the activity of the photocatalytic oxidation of tryptophan in water. It is shown that the photocatalytic activity in the tryptophan oxidation of fluorinated tetraphenylporphyrin immobilized on a SA–CT polyelectrolyte complex and alginate solid gel is higher than that of FTPP immobilized on chitosan solid gel. Spectral-luminescent properties of polysaccharide–FTPP systems and the surface structure of carriers are studied via atomic force microscopy to determine the mechanism of the increase in porphyrin activity when it is fixed on alginate-containing carriers. It is suggested that aspects of the supramolecular structure of solid gels are responsible for the increase in the photocatalytic activity of FTPP upon immobilization on alginate-containing polysaccharide systems.

Keywords

chitosan, sodium alginate, polyelectrolyte complex, fluorinated porphyrin photosensitizers, immobilization

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