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Дата последнего поиска статьи во внешних источниках: 11 апреля 2022 г.
Аннотация:The present review compiles the advances in the dendritic catalysis within the last twodecades, in particular concerning heterogeneous dendrimer-based catalysts and their and applicationin various processes, such as hydrogenation, oxidation, cross-coupling reactions, etc. There areconsidered three main approaches to the synthesis of immobilized heterogeneous dendrimer-basedcatalysts: (1) impregnation/adsorption on silica or carbon carriers; (2) dendrimer covalent grafting tovarious supports (silica, polystyrene, carbon nanotubes, porous aromatic frameworks, etc.), whichmay be performed in a divergent (as a gradual dendron growth on the support) or convergent way(as a grafting of whole dendrimer to the support); and (3) dendrimer cross-linking, using transitionmetal ions (resulting in coordination polymer networks) or bifunctional organic linkers, whosesize, polarity, and rigidity define the properties of the resulted material. Additionally, magnetically separable dendritic catalysts, which can be synthesized using the three above-mentioned approaches,are also considered. Dendritic catalysts, synthesized in such ways, can be stored as powders and be easily separated from the reaction medium by filtration/centrifugation as traditional heterogeneous catalysts, maintaining efficiency as for homogeneous dendritic catalysts