For NMR measurements, the fully activated MOF was loaded into a rotor in a home-built gas manifold inside the argon atmosphere of a glovebox and evacuated before dosing with the 13 Clabeled ethylene at ~1000 mbar. The rotor was closed within the manifold and the sample transferred to a 11.7 T magnet were spun immediately under continuous N2 flow and with compressed air at 16.4 T.