Synthesis, Postsynthetic Modifications, and Applications of the First Quinoxaline-Based Covalent Organic Framework.
Valerie A KuehlPhuoc H H DuongDeana SadrievaSamrat A AminYuqi SheKatie Dongmei Li-OakeyJeffery L YargerBruce A ParkinsonJohn O HobergPublished in: ACS applied materials & interfaces (2021)
We report a new synthetic protocol for preparing highly ordered two-dimensional nanoporous covalent organic frameworks (2D-COFs) based on a quinoxaline backbone. The quinoxaline framework represents a new type of COF that enables postsynthetic modification by placing two different chemical functionalities within the nanopores including layer-to-layer cross-linking. We also demonstrate that membranes fabricated using this new 2D-COF perform highly selective separations resulting in dramatic performance enhancement post cross-linking.