Phosphonated Polyethylenimine Maghemite Nanoparticles: A Convenient Support of Palladium for Cross-Coupling Reactions

Abstract

Phosphonated polyethylenimine grafted on iron oxide nanoparticles was used as a magnetic support for loading palladium. This cheap and accessible heterogeneous catalyst demonstrated good efficiency in Suzuki-Miyaura, Mizoroki-Heck, and Tsuji-Trost couplings. The nanocomposite is resistant to harsh conditions and can therefore be recycled up to 10 cycles with high catalyst efficiency.

Short-Term Stability of Electrochemical Properties of Layer-by-Layer Coated Heterogeneous Ion Exchange Membranes

“…Polyallylamine is used for layer-by-layer assembly [ 39 ] as a component of new promising materials (such as thermo-responsive polymers with cleavage-induced phase transition [ 40 ] or coatings decomposing by application of electric potential [ 41 ]), including biomedical applications such as creation of nano-capsules for drug delivery [ 42 ] and food packaging [ 43 ]. Polyethylenimine is frequently used as a polymer carrier [ 44 ] and basis for loading of nanoparticles [ 45 ] or coating for medical applications [ 46 ]. However, its use in biomedical application is shaped by the cyto-staticity [ 47 ] or cytotoxicity of amine groups which simultaneously makes it non-biocompatible [ 48 ] and useful as antimicrobial and anticancer agent [ 49 , 50 ].…”