3D Covalent Organic Network Membranes With Regionally Ordered Nanochannels for Efficient Molecular Sieving

and a molecular weight cut-off of 248 Da. This ultrafine 3D hierarchical pore architecture enables excellent fractionation of dye mixtures with similar molecular weights and efficient antibiotic concentration. This work rationalizes the design of chemically stable covalent organic network membranes with 3D partially ordered sub-microporosity, extending their application to precision molecular separations.