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

ABSTRACT: Polymeric composite membranes hold significant promise for molecular sieving in organic solvents, yet struggle with the precise fractionation of small molecules, a critical need in the chemical and pharmaceutical industries. Here an innovative covalent organic network (CON) membrane featuring 3D interpenetrated ultra-microporous channels for effective fractionation of small-molecule solutes is presented. Rational utilization of unique tetrahedral amine (TAM) as aqueous-phase building blocks to crosslink with acyl chlorides yields CON polyamide thin films with finely tuned ordered porosity. Importantly, three-node acyl chloride (TMC) with high reactivity facilitates sharpening the membrane pore size distribution due to the partially ordered and elevated crosslinked structure. Molecular dyna

SUBMITTER: Ge L 

PROVIDER: S-EPMC12561272 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature