Synthesis, Postsynthetic Modifications, and Applications of the First Quinoxaline-Based Covalent Organic Framework.
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.
['Kuehl|Valerie A|VA|', 'Duong|Phuoc H H|PHH|https://orcid.org/0000-0002-0949-3505', 'Sadrieva|Deana|D|', 'Amin|Samrat A|SA|', 'She|Yuqi|Y|', 'Li-Oakey|Katie D|KD|https://orcid.org/0000-0002-0529-9203', 'Yarger|Jeffery L|JL|https://orcid.org/0000-0002-7385-5400', 'Parkinson|Bruce A|BA|https://orcid.org/0000-0002-8950-1922', 'Hoberg|John O|JO|https://orcid.org/0000-0003-3833-8122']
covalent organic framework nanoporous quinoxaline COF membrane filtration modifiable materials