PD-NANOPARTICLES CONFINED WITHIN HOLLOW POLYMERIC FRAMEWORK AS EFFECTIVE CATALYSTS FOR THE SYNTHESIS OF FINE CHEMICALSстатья

Статья опубликована в высокорейтинговом журнале

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Дата последнего поиска статьи во внешних источниках: 13 ноября 2019 г.

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[1] Pd-nanoparticles confined within hollow polymeric framework as effective catalysts for the synthesis of fine chemicals / N. A. Nemygina, L. Z. Nikoshvili, V. G. Matveeva et al. // Topics in Catalysis. — 2016. — Vol. 59, no. 13. — P. 1185–1195. Encapsulation of metal nanoclusters in porous solid polymer materials is a promising approach to combine the outstanding properties of both, heterogeneous and homogeneous catalysts. We report heterogeneous nano-engineered catalysts containing Pd-nanoparticles (NPs) confined within highly-porous hollow polymeric framework of hyper cross-linked polystyrene (HPS). HPS with different surface functionalities (amine vs. sulfonate) were used for impregnation by Pd precursors of different nature and followed by a variety of catalyst post-treatments. The catalysts have been tested in two model key reactions for the synthesis of fine chemicals: selective hydrogenation of 2-methyl-3-butyne-2-ol to 2-methyl-3-butene-2-ol (MBE) and Suzuki cross-coupling of 4-bromoanisole with phenylboronic acid. Optimization of the Pd/HPS preparation and reaction conditions allowed attaining high selectivity (∼99 %) to target MBE at close to full conversion. For Suzuki cross-coupling more than 90 % yield of coupling product was obtained under mild reaction conditions and the absence of phase transfer agent. Our results demonstrate the potential of HPS as a suitable support for tailoring metal NPs properties and circumvent undesirable metal leaching. [ DOI ]

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