Synthesis, Postsynthetic Modifications, and Applications of the First Quinoxaline-Based Covalent Organic Framework
Valerie A. Kuehl, Phuoc H. H. Duong, Deana Sadrieva, Samrat A. Amin, Yuqi She, Katie Li-Oakey, Jeffery L. Yarger, B. A. Parkinson, John O. Hoberg
Abstract
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.
Topics & Concepts
QuinoxalineNanoporousCovalent organic frameworkCovalent bondMaterials scienceNanotechnologyMembraneNanoporeLayer (electronics)Chemical modificationCombinatorial chemistryOrganic chemistryPolymer chemistryChemistryBiochemistryCovalent Organic Framework ApplicationsMetal-Organic Frameworks: Synthesis and ApplicationsMembrane Separation and Gas Transport