Fig. 2: 13C-methanol hyperpolarized with PHIP-X.
From: Nuclear spin polarization of lactic acid via exchange of parahydrogen-polarized protons
a 13C-NMR spectra of methanol hyperpolarized using PHIP-X. DEPT 135o tuned to J(1Hl-13C) = 3 Hz and J(1Hc-13C) = 145 Hz were compared with the thermally polarized sample (black). Applying the 145-Hz-DEPT resulted in higher polarization than using the 3-Hz-DEPT sequence. The thermal spectrum (black) was amplified by a factor of 20 and recorded by averaging 200 scans. b Signal enhancement of 13C-methanol for different fields BPol0 during hydrogenation (for each point the mean was calculated using 3 measurements with standard deviation). In this experiment, only alcoholic hydroxy groups, but no carboxylic groups, were present.
