Scalable Synthesis of Stable Hydrogen-Bonded Organic Framework for Efficient Hexafluoroethane Purification.

Developing stable, efficient and easily scalably-synthesized adsorbents for removal of hydrofluoroethanes to obtain high purity hexafluoroethane (CF) is of great importance to the electronics industry. Herein, we report a hydrogen-bonded organic framework (HOF-TDBB) which exhibits statically as well as dynamically preferential hydrofluoroethanes (CFCHF and CFCHF) adsorption and achieves efficient one-step CF purification from CFCHF/CFCHF/CF mixture. At 298 K, 11.7 mol kg of high-purity CF can be obtained by HOF-TDBB from 5/5/90 CFCHF/CFCHF/CF mixture. Additionally, excellent stability endows HOF-TDBB with good separation ability under various harsh conditions. For example, the separation performance can be well maintained within the dozens of consecutive separation experiments. Even at 338 K, 5.7 mol kg of pure CF can also be collected. More importantly, this material can be rapidly synthesized with a large scale by simple rotary evaporation. Combined with excellent separation performance, high stability and scalable synthesis, HOF-TDBB has unlocked its great potential in this challenging industrial separation.