The stereocomplexed poly(lactic acid)-polyethyleneglycol copolymer was synthesized and successfully used as heterogeneous and recyclable support for small Pt nanoparticles (1.4 nm), generated by the metal vapor synthesis technique. Hydrogenation reactions of aromatic nitrocompounds, containing other reducible functional groups to the corresponding anilines with the latter supported Pt nanoparticles showed that the covalently attached polyethyleneglycol polymer boosted the catalytic activity compared to an analogous catalytic system which did not contain polyethyleneglycol. The high chemoselectivity found (>99.4%) even after complete substrate conversion was mainly due to the small particle size used.
Platinum nanoparticles onto pegylated poly(lactic acid) stereocomplex for highly selective hydrogenation of aromatic nitrocompounds to anilines
Claudio Evangelisti;Werner Oberhauser;Rinaldo Psaro;Elisa Passaglia;
2017
Abstract
The stereocomplexed poly(lactic acid)-polyethyleneglycol copolymer was synthesized and successfully used as heterogeneous and recyclable support for small Pt nanoparticles (1.4 nm), generated by the metal vapor synthesis technique. Hydrogenation reactions of aromatic nitrocompounds, containing other reducible functional groups to the corresponding anilines with the latter supported Pt nanoparticles showed that the covalently attached polyethyleneglycol polymer boosted the catalytic activity compared to an analogous catalytic system which did not contain polyethyleneglycol. The high chemoselectivity found (>99.4%) even after complete substrate conversion was mainly due to the small particle size used.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
