Microencapsulated Linear Polymers:'Soluble' Heterogeneous Catalysts

摘要

Catalysts are often the most expensive component of a reaction and are frequently difficult to separate from the product.A wide variety of solid supports are used to facilitate catalyst removal and recycling.Cross-linked polymers are especially flexible supports for organo-catalysts and ligands because myriad methods are available for covalent attachment.The high surface area and porous structure allow small molecules to rapidly diffuse in and out of the polymeric supports.The catalysts on the support,conversely,diffuse very little and experience a different solvation environment than homogeneous catalysts,often rendering them less selective and less active,unless painstakingly optimized.