Recyclable Pd‐based polysaccharide catalyst for aerobic oxidation of benzyl alcohol

Abstract

Palladium acetate that was heterogenized together with triphenylphosphine trisulfonate ligand on renewable polysaccharides was employed in the aerobic oxidation of benzyl alcohol in three representative solvents-hexane, ethyl acetate, and ethanol. Solvent polarity was found to affect the reaction rate, as both the solubility of benzyl alcohol and oxygen depend on the nature of the solvent. The conversion rate was decreased in the order of hexane > ethanol > ethyl acetate (conversion rates in the presence of the heterogenized iota-based catalyst after 24 h of reaction were 38, 20, and 15%, respectively). In addition, the nature of the polysaccharide, that is, the type and numbers of functional groups on its backbone, also affected the reaction

Ultrafine palladium nanoparticles confined in polydopamine functionalized chlorinated poly(vinyl chloride) nanofibers for Heck reaction

“…Palladium nanoparticles have been extensively used to catalyze many organic reactions for their high catalytic activity and selectivity, such as oxidation, reduction, and coupling reactions 7–11 . Palladium nanoparticles are usually fabricated into ultra‐fine particles with larger accessible surface area in order to improve their catalytic activity.…”

“…Palladium nanoparticles have been extensively used to catalyze many organic reactions for their high catalytic activity and selectivity, such as oxidation, reduction, and coupling reactions. [7][8][9][10][11] Palladium nanoparticles are usually fabricated into ultra-fine particles with larger accessible surface area in order to improve their catalytic activity. Unfortunately, like other metal nanoparticles, these ultrafine palladium nanoparticles are not stable and easily aggregated into larger particles even under mild conditions.…”

Magnetic graphene oxide/carboxymethyl-imidazolium-grafted chitosan Schiff base nanocomposite: a new PdNPs support for efficient catalytic reduction of hazardous nitroarenes

“…Therefore, various organic and inorganic materials have been widely applied as solid scaffolds to stabilize PdNPs and prevent their agglomeration as well [14]. To name a few, functionalized SBA-15 [ 15 , 16 , 17 ], modi ed biopolymers [ 18 ], organohydrogels [ 19 ], poly(ionic liquid) (PIL)…”