Nanoscaled reusable palladium catalyst supported on chitosan hybrid composite microcapsules reinforced with ZnO nanoparticles for Heck coupling reactions

Abstract

In the present work, a novel nanocatalyst system (Pd@CS-ZnO) was developed by adorning palladium nanoparticles on the hybrid nanocomposite consisting of chitosan and ZnO nanoparticles which are prepared as a suitable stabilizer.

Supramolecular Pd@methioine-EDTA-chitosan nanocomposite: an effective and recyclable bio-based and eco-friendly catalyst for the green Heck cross-coupling reaction under mild conditions

“…36,[64][65][66][67][68][69][70][71][72][73][74] Because of the presence of both free NH 2 and OH functional groups in the structure of chitin and especially its deacetylated derivative, chitosan, 71 the application of these biodegradable and biocompatible materials have received extensive consideration recently in sustainable chemistry as excellent supports for catalytic systems. [75][76][77][78][79][80][81][82][83][84][85][86][87][88] Chitosan now plays a vital role in different elds, including medicine, drug delivery, food packaging, cosmetics, water treatment, membranes, fuel cells, hydrogels, adhesives, and surface conditioners. [89][90][91][92][93][94][95][96][97] Indeed, the NH 2 groups with high chelating ability as well as the proper geometry of neighboring OH groups in the chitosan scaffold along with its insolubility in the majority of organic solvents and water make it the best candidate for using in the preparation of robust supramolecular heterogeneous catalysts by both academia and the chemical industry, especially in the pharmaceutical sector.…”