Covalent Organic Framework-Covalent Organic Framework Bilayer Membranes for Highly Selective Gas Separation.

  title={Covalent Organic Framework-Covalent Organic Framework Bilayer Membranes for Highly Selective Gas Separation.},
  author={Hongwei Fan and Alexander Mundstock and Armin Feldhoff and Alexander Knebel and Jiahui Gu and Hong Meng and J{\"u}rgen Caro},
  journal={Journal of the American Chemical Society},
  volume={140 32},
Covalent organic frameworks (COFs) have been proposed as alternative candidates for molecular sieving membranes due to their chemical stability. However, developing COF membranes with narrowed apertures close to the size of common gas molecules is a crucial task for selective gas separation. Herein, we demonstrate a new type of a two-dimensional layered-stacking COF-COF composite membrane in bilayer geometry synthesized on a porous support by successively regulating the growth of imine-based… 

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