Bottom-Up Synthesis of 8-Connected Three-Dimensional Covalent Organic Frameworks for Highly Efficient Ethylene/Ethane Separation

Developing cost-/energy-efficient separation techniques for purifying ethylene from an ethylene/ethane mixture is highly important but very challenging in the industrial process. Herein, using a bottom-up [8 + 2] construction approach, we rationally designed and synthesized three three-dimensional covalent organic frameworks (COFs) with 8-connected bcu networks, which can selectively remove ethane from an ethylene/ethane mixture with high efficiency. These COF materials, which are fabricated by the condensation reaction of a customer-designed octatopic aldehyde monomer with linear diamino linkers, possess high crystallinity, good structural robustness, and high porosity. Attributed to the well-organized…

• NN
  National Natural Science Foundation of China

  Award: 22001131
• MO
  Ministry of Science and Technology of the People's Republic of China

  Award: 2020YFA0907300
• CP
  China Postdoctoral Science Foundation

  Award: 2019M660974
• HE
  Higher Education Discipline Innovation Project

  Award: B12015