ИСТИНА

Hyperbranched polymers are highly branched macromolecules, which are characterized by low viscosity, high solubility compared to that of linear polymers, a generous amount of terminal functional groups. Here the synthesis of novel hyperbranched polypyridylphenylenes through the Diels-Alder cycloaddition is presented. The first generation pyridylphenylene dendrimer with six ethynyl functionalities was used as a monomer A6 while the different phenylsubstituted biscyclopentadienones acted as B2 monomers in polymer synthesis [1]. The detailed analysis of reaction condition allowed us to control the structure and molecular weight of the polymers. To prove the polymer structure the 1H and inverse-gated decoupling 13C nuclear magnetic resonance spectroscopy was successfully applied. The polymers synthesized were used as templates for encapsulation of metal nanoparticles. As a result new magnetically separable catalysts based on iron oxide and ZnO nanoparticles were developed. The STEM EDS mapping and TEM have been carried out to assess the composition and morphology of nanoparticles formed. The nanocomposites were tested in methanol synthesis from syngas. References [1] Kuchkina, N.V.; Zinatullina, M.S.; Serkova, E.S.; Vlasov, P.S.; Peregudov, A.S.; Shifrina, Z.B. RSC Adv. 2015, 120(5), 99510-99516. This work was supported by RFBR, project № 14-03-00876.