Thiazole functionalized covalent triazine frameworks for C 2 H 6 /C 2 H 4 separation with remarkable ethane uptake.

A highly stable thiazole functionalized covalent triazine framework, namely CTF-BT-500, was developed for C 2 H 6 /C 2 H 4 separation, which exhibits a record-high ethane uptake (99.7 cm 3 g -1 ) among all reported COFs at 298 K and 1 bar. This work not only presents an excellent C 2 H 6 -selective adsorbent, but also provides guidance for the construction of robust adsorbents for value-added gas purification.