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. Author manuscript; available in PMC: 2020 Apr 2.
Published in final edited form as: Anal Chem. 2019 Mar 20;91(7):4741–4746. doi: 10.1021/acs.analchem.9b00259

Figure 3.

Figure 3.

Proton NMR spectroscopy using 1.4 T bench-top NMR spectrometer of a) thermally polarized reaction gas mixtures after passing through a reactor filled with 118 mg of Rh/TiO2 catalyst after cyclopropane treatment: note all NMR peaks are attributed to propane product; and b) HP propane after passing through a reactor filled with 120 mg of unaltered Rh/TiO2, signal enhancement ε ~ 1,100 corresponding to 0.5% polarization at 1.4 T. Other experimental conditions employed for spectra acquisition in displays a) and b) are t = 40 °C, 20% excess of p-H2 over propylene, ~6 sLm flow rate, ~4 atm total pressure.