Pd-nanoparticles supported onto functionalized poly(lactic acid)-based stereocomplexes for partial alkyne hydrogenation

Palladium Nanoparticles Immobilized on Magnetic Porous Carbon Derived from ZIF‐67 as Efficient Catalysts for the Semihydrogenation of Phenylacetylene under Extremely Mild Conditions

“…[1,2] Many kinds of heterogeneous Pd-based catalysts have been designed and utilized in the hydrogenation of phenylacetylene. For example, Pd nanoparticles (NPs) supportedo nf unctionalized polymers [3] and polymer-based stereocomplexes, [4] MCM-41, [5] carbon materials, [6] and a-Al 2 O 3 [7] have been used in this reaction. Goodc onversions and selectivities were obtained in most of these studies, however,t he hydrogenation of phenylacetylene at room temperature and atmosphericp ressure is reportedr arely.T herefore, although numerous efforts have been put into this reaction, [8] there is still room fori mprovement under extremely mild conditions (298 K, H 2 1atm).…”

Palladium-nanoparticles on end-functionalized poly(lactic acid)-based stereocomplexes for the chemoselective cinnamaldehyde hydrogenation: Effect of the end-group

“…3) exhibited Pd-NPs of comparable size, which formed large aggregates, leading hence to a poor Pd dispersion on the polymer surface. In fact, bipyridine and pyridine end-functionalized polymers revealed notable Pd-NP stabilizing properties [13,19,24,29,30]. Even on increasing the Pd loading from 0.6 to 3.0 w/w% as in Pd 0 @L BiPy , a similar Pd dispersion was obtained (i.e.…”

“…Recently we introduced the stereocomplex of 2,2 0 -bipyridi ne-functionalized poly(lactic acid) PLA as organic support for Pd-NPs, which selectively catalyzed the partial hydrogenation of phenylacetylene and diphenylacetylene [13]. The stereocomplex, which is formed upon hydrogen bond interactions between land d-PLA [14], is much more resistant against hydrolytic [15,16] and thermal degradation [17] compared to l-or d-PLA.…”

The Modification of Diphenyl Sulfide to Pd/C Catalyst and Its Application in Selective Hydrogenation of p-Chloronitrobenzene

“…Supported noble metal catalysts are widely used in the hydrogenation reactions because of their high catalytic activity, easy separation and reusability [1][2][3][4]. Unfortunately, in liquid-phase selective hydrogenation of organic compounds with various reducible functionalities, the noble metal catalysts often suffered from over-hydrogenation which limits their applications.…”