This presentation will discuss the efforts by our research groups at Northwestern University and Argonne National Laboratory in bridging homogeneous and heterogeneous catalysis through the application of single-sire and supramolecular catalyst-design principles to the development of porous organic polymer (POPs) as heterogeneous catalysts.<br/><br/>Supramolecular assemblies are large soluble structures constructed from molecules rather than atoms as building blocks. As thermodynamically stable structures, the stability of these materials comes from marshalling multiple weak interactions in a highly reinforcing way. In this sense, supramolecular chemistry has the potential for bringing together cooperative catalytic sites, stabilizing potent reaction centers, and creating architectures that elicit reaction selectivity. Previous examples from our group include assemblies capable of catalyzing enantioselective oxidation reactions, enantioselective epoxide ring-opening, and acyl transfer reactions with applications in sensing.<br/><br/>As hybrid materials derived from well-defined molecular building blocks, POPs are natural solid-state 3-D versions of supramolecules. These materials have many of the desirable features of zeolites, such as high surface area and porosity, and can be similarly effective in size- and shape-selective catalysis. However, given the enormous diversity of potential structures and chemical functional groups that can be incorporated into the pores of POPs, these porous materials have the potential to extend catalysis far beyond the realm of zeolitic chemistry to include enzyme-like behaviors such as adapted flexibility during catalysis, substrate pre-concentration effects, active-site isolation and protection, and tunable hydrophobicity. Most importantly, recent developments in POP synthesis have given rise to catalytically active materials with unprecedented stability and novel activity that were not observed in solution

From single-site catalysts and supramolecular assemblies to porous organic polymer (POPs): Bridging homogeneous and heterogeneous catalysis

255th National Meeting (2018)

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