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. Author manuscript; available in PMC: 2020 May 9.
Published in final edited form as: J Phys Chem C Nanomater Interfaces. 2019 Apr 11;123(18):11734–11744. doi: 10.1021/acs.jpcc.9b01538

Figure 1.

Figure 1

1H NMR single-scan spectroscopy of HP propane gas using the 1.4 T setup (see Scheme S1 for details). a) Schematic of heterogeneous pairwise pH2 addition. b) 1H NMR spectrum of HP propane acquired with the apparatus in continuous-flow mode. c) 1H NMR spectrum of thermally polarized propane spectrum (blue) and spectral fitting (red) using the Bruker Daisy software package. d) 1H NMR spectrum of HP propane acquired in a stopped-flow mode. e) Plot of NMR signal enhancement values of the HP methyl proton (HA) at different operating temperatures obtained via continuous-flow operation (reactor prepared by mixing ~62 mg of the Rh/TiO2 catalyst and 6.6 g of Cu in the 2nd stage of the hyperpolarizer). Connecting lines in display e) are meant only to guide the eye.