TY  - JOUR
A1  - Mondal, Suvendu Sekhar
A1  - Hovestadt, Maximilian
A1  - Dey, Subarna
A1  - Paula, Carolin
A1  - Glomb, Sebastian
A1  - Kelling, Alexandra
A1  - Schilde, Uwe
A1  - Janiak, Christoph
A1  - Hartmann, Martin
A1  - Holdt, Hans-Jürgen
T1  - Synthesis of a partially fluorinated ZIF-8 analog for ethane/ethene separation
T2  - CrystEngComm
N2  - The separation of ethane/ethene mixtures (as well as other paraffin/olefin mixtures) is one of the most important but challenging processes in the petrochemical industry. In this work, we report the synthesis of ZIF-318, isostructural to ZIF-8 but built from the mixed linkers of 2-methylimidazole (L1) and 2-trifluoromethylimidazole (L2) (ZIF-318 = [(Zn(L1)(L2)](n)). The synthesis has been optimized to proceed without ZnO-formation. Using only the L2 linker under solvothermal conditions afforded ZnO-embedded in the H-bonded and non-porous coordination polymer ZnO@[Zn-2(L2)(2)(HCOO)(OH)](n). The slight differences in the size of the substituents (-CH3 vs. -CF3) possibly in combination with different electronic inductive effects led to small but significant changes to the pore size and properties respectively, though the effective pore opening (aperture) size of ZIF-318 remained the same in comparison with ZIF-8. ZIF-318 is chemically (boiling water, methanol, benzene, and wide pH range at room temperature for 1 day), thermally (up to 310 degrees C) stable, and more hydrophobic than ZIF-8 which is proven by contact angle measurement. ZIF-318 can be activated for N-2, CO2, CH4, H-2, ethane, ethane, propane, and propene gases sorptions. Consequently, in breakthrough experiments, the ethane/ethene mixtures can be separated.
Y1  - 2017
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/46253
SN  - 1466-8033
VL  - 19
SP  - 5882
EP  - 5891
PB  - Royal Society of Chemistry
CY  - Cambridge
ER  -