Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Separation of Xylene Isomers in the Anion‐Pillared Square Grid Material SIFSIX‐1‐Cu
Ist Teil von
Chemistry : a European journal, 2021-04, Vol.27 (20), p.6187-6190
Ort / Verlag
Germany: Wiley Subscription Services, Inc
Erscheinungsjahr
2021
Link zum Volltext
Quelle
Wiley Online Library Journals Frontfile Complete
Beschreibungen/Notizen
Xylene isomer separation is considered one of the seven separation challenges that changed the world. In addition, the high‐energy demand of xylene separation highlights the need for efficient novel adsorbents. Herein, the liquid‐phase separation potential of the anion‐pillared hybrid material SIFSIX‐1‐Cu was studied for preferential adsorption of o‐xylene and m‐xylene over p‐xylene, which was inspired by a previous complexation crystallization method for separating m‐xylene. We report detailed experimental liquid‐phase adsorption experiments, yielding selectivities of 3.0 for o‐xylene versus p‐xylene and 2.6 for m‐xylene versus p‐xylene. Our theoretical calculations thus provide a reasonable explanation that the xylene adsorption selectivity is attributed to the C−H⋅⋅⋅F interaction, and the host–guest interaction order agrees with the adsorption priority: o‐xylene > m‐xylene > p‐xylene.
Given its unique anion‐pillared grid structure and suitable pore size, SIFSIX‐1‐Cu exhibits a preference to adsorb o‐xylene and m‐xylene over p‐xylene in liquid phase. The C−H⋅⋅⋅F interaction is the key to the different adsorption performance of xylene isomers on the SIFSIX‐1‐Cu adsorbent.