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.

中文翻译：

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海藻酸盐-壳聚糖聚电解质复合物作为单线态氧产生光敏系统中氟化四苯基卟啉的载体

摘要

通过将丙酮溶液中的氟化四苯基卟啉 (FTPP) 固定在基于海藻酸钠 (SA) 和壳聚糖 (CT) 的聚电解质复合物薄膜上，获得对产生单线态¹ O ₂氧具有活性的水不溶性光敏 (PS) 系统，以及海藻酸盐和壳聚糖的固体水不溶性凝胶。所获得的聚合物PS系统用于确定D ₂ O中单线态氧的光致发光强度和水中色氨酸的光催化氧化活性。结果表明，SA-CT聚电解质复合物和海藻酸盐固体凝胶上固定的氟化四苯基卟啉的色氨酸氧化光催化活性高于壳聚糖固体凝胶上固定的FTPP。通过原子力显微镜研究多糖-FTPP系统的光谱发光特性和载体的表面结构，以确定当卟啉固定在含藻酸盐载体上时卟啉活性增加的机制。这表明固体凝胶超分子结构的各个方面是固定在含藻酸盐多糖系统上的 FTPP 光催化活性增加的原因。