The removal of ethane (CH) from its analogous ethylene (CH) is of paramount importance in the petrochemical industry, but highly challenging due to their similar physicochemical properties. The use of emerging porous organic cage (POC) materials for CH/CH separation is still in its infancy. Here, we report the benchmark example of a truncated octahedral calix[4]resorcinarene-based POC adsorbent (CPOC-301), preferring to adsorb CH than CH, and thus can be used as a robust absorbent to directly separate high-purity CH from the CH/CH mixture. Molecular modelling studies suggest the exceptional CH selectivity is due to the suitable resorcin[4]arene cavities in CPOC-301, which form more multiple C-H···π hydrogen bonds with CH than with CH guests. This work provides a fresh avenue to utilize POC materials for highly selective separation of industrially important hydrocarbons.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8211788 | PMC |
| http://dx.doi.org/10.1038/s41467-021-24042-7 | DOI Listing |
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