Abstract
The removal of trace acetylene (C2H2) from raw ethylene (C2H4) stream is critical for production of polymer-grade chemicals. We herein report a perchlorate-coordinated metal–organic framework (ZJU-194) featuring flexible-robust network for efficient C2H2/C2H4 separation. The distinct-different host–guest affinity accounts for two-step gate-opening adsorption of C2H2, but gate-close of C2H4. It thus affords very high adsorptive selectivity (28.9) at ambient conditions, endowing ZJU-194 among one of the top-performing porous materials for C2H2/C2H4 separation.
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