Table 1.

Experimental procedure for gem-PHIP experiments.

Duration	Event
–	Inject 300  $\mathrm{\mu }$ L of sample solution into the NMR tube.
1 min	Pressurize and bubble sample with inert gases at 4 bar. Depressurize.
10 min	Put sample in the magnet and raise temperature from 40 to 60  ${}^{\circ }$ C.
10 s	Pressurize sample with parahydrogen.
10 s	Bubble sample with parahydrogen to saturate sample and to pre-activate the catalyst.
5 min	Establish field homogeneity (shimming).
Variable	Perform the experiment.
–	Lower temperature to 40  ${}^{\circ }$ C and depressurize the sample.