Alkyl?Linked Porphyrin Porous Polymers for Gas Capture and Precious Metal Adsorption

In gas adsorption and metal recovery, inexpensive covalently bonded porous polymers offer industrial feasibility, despite the challenge of having reactive functionalities while maintaining porosity. Herein, three highly covalent organic (COPs), COP-210, COP-211, COP-212, with porphyrin that are readily synthesized by a Friedel–Crafts reaction using chlorinated solvents as linkers reported. The exhibit competitive capacities for CO2, H2, CH4. Their sites proved particularly effective in precious where COPs high selectivity toward gold, platinum, palladium, silver. Analysis reveals reductive capture is prevalent gold Platinum also captured through combination reduction chelation. 0.901–1.250 g g?1 fast kinetics at low pH. COP-212 selectively recovers 95.6% from actual electronic waste (e-waste) collected junkyards. results show scalable great potential capture, separation, recovery.