Sustainable porous polymers for gas capture, water treatment, and catalysis
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Nanopores in porous polymers offer confined spaces with vast contact surfaces and tunable functionalities. We have developed a family of nanoporous covalent organic polymers through scalable, catalyst free conditions that feature a wide range of functional groups available for chemical interactions. In water treatment, COPs can selectively capture contaminants such as micropollutants. Heavy metals and uranium capture from seawater also benefit from heterogeneous nature of the sorbents with high diffusion rates. In particular, porphyrin and nitrile containing COPs showed high precious metal uptake capacities. By varying chain length of a covalently tethered amine within a nanopore, we optimized CO2 binding energy, leading to new CO2 sorbent designs. Another, pyridyl salicylimine based system converts epoxides and CO2 into cyclic carbonates with unprecedented selectivity and conversion at ambient conditions