Skip to main content
. Author manuscript; available in PMC: 2012 Oct 1.
Published in final edited form as: NMR Biomed. 2011 Apr 28;24(8):1023–1028. doi: 10.1002/nbm.1717

Figure 1.

Figure 1

a) Molecular cis addition of parahydrogen to TFPA to produce TFPP. The catalytic reaction was carried out at 62°C but the hyperpolarized solution was cooled to 35–40°C by the time it comes out of the polarizer. b) Quantification of PHIP 13C signal enhancement by 13C spectroscopy of hyperpolarized 3.2 mM TFPP at 4.7 T in vitro. Polarization of 17% was achieved in this representative example. The inset spectrum shows a reference signal obtained from the natural abundance 4.5 M ethanol, 13C concentration = 50 mM per carbon site.