Comparative studies of the new triple selenium-containing nanosystems (SCNs) based on the photosensitizer Radachlorine (Rd) and amphiphilic molecular brushes (graft-copolymers) with the polyimide or cellulose main chain and polymethacrylic acid (PMAC) side chains have been carried out using UV/visible spectroscopy, atomic force microscopy (AFM) and luminescence. The influence of the graft copolymer structure on the spectral and dimensional characteristics of the amphiphilic molecular brushes loaded with selenium and Rd NPs has been established. It was found that amphiphilic molecular brushes prevented association of the selenium NPs in the solution, forming discrete spherical nanostructures. It is suggested that the formation of triple SCNs is carried out mainly due to the steric stabilization of the selenium NPs by macromolecules of the brushes and the embedding of the selenium NPs inside the Rd porphyrin ring according to the type of metal-porphyrin complexes. Based on UV/visible spectroscopy and luminescence data, the values of the band gap energy, the diameter of the selenium nanoparticles, and the luminescence quantum yield were calculated for SCN.
S.V. Valueva (Wed,) studied this question.