Synthesis and Catalytic Applications of Mesoporous Polymer Colloids in Olefin Hydrosilylation

Abstract

Mesoporous polymer particles (MPPs) have been synthesized by using the spherical microparticles of siliceous mesocellular foam (MCF) as a hard template. The MPPs possessed a robust structure with ultralarge mesopores, and a clean and inert surface. The surface properties of the MPPs could be tailored for various applications by using different functionalized monomers. An imidazolium-pyrrolidine ligand was successfully immobilized onto MPPs and used as a supported platinum organometallic catalyst in olefin hydrosilylation. The MPP-supported catalyst provided superior activity and selectivity for this reaction as compared to the MCF-supported catalyst.

Colloidal poly-imidazolium salts and derivatives

“…This has led to many applications of NHCbased catalysts in organic synthesis [20][21][22][23][24][25][26][27][28]. Significant efforts have been devoted towards developing heterogeneous NHC organometallic catalysts through immobilization, polymerization as side chain, and other methods [29][30][31][32][33]. However, preparation of main-chain NHC polymers has surprisingly been an underdeveloped area.…”

Metal–organic frameworks containing N-heterocyclic carbenes and their precursors

“…The need to heterogenize these NHC-based catalysts for optimum and versatile application arises. Many efforts have been made to achieve this goal through immobilization, polymerization of the side chain, the design of azolium-containing MOFs, and other methods [135][136][137][138]. In MOFs, heterogeneous counterparts of some homogeneous catalysts are obtained by careful selection of the organic linker and metal ion or clusters.…”

One-pot synthesis of porous monolith-supported gold nanoparticles as an effective recyclable catalyst

“…Recently, macroscopic and porous polymeric matrixes are becoming popular supports of metal nanoparticles. [19][20][21][22][23][24][25][26][27][28][29] For example, Backov et al 24 successfully immobilized catalytic palladium nanoparticles onto a porous polymeric material via a 5-step procedure, and the resulting catalyst appears well recyclable. Zhang et al 29 successfully prepared very large porous beads (diameters at millimeter scale), with AuNPs embedded on the surface as recyclable catalyst.…”