Aryl and hetarylpyrazolines smoothly undergo photoaromatization under irradiation with the visible light (λ > 400 nm) in the presence of carbon tetrachloride. The reaction is accompa nied by an increase in the acidity of the medium and a change in the fluorescence. The structure of pyrazoline and solvent considerably affect the photoaromatization rate. The mecha nism of the reaction was proposed, which agrees with the experimental data.

Multicomponent molecular brushes containing amphiphilic polymer moieties are promising objects of research of macromolecular chemistry. The development of stimulus-responsive systems sensitive to changes in environmental parameters, based on the molecular brushes, opens up new possibilities for their applications in medicine, biochemistry and microelectronics. The review presents the current understanding of the structures of main types of amphiphilic multicomponent brushes, depending on the chemical nature and type of coupling of the backbone and side chains. The approaches to the controlled synthesis of multicomponent molecular brushes of different architecture are analyzed. Self-assembly processes of multicomponent molecular brushes in selective solvents are considered. The bibliography includes 259 references.

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