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. Author manuscript; available in PMC: 2018 Jun 20.
Published in final edited form as: J Phys Chem B. 2012 Jun 7;116(24):7055–7065. doi: 10.1021/jp300539j

Figure 5.

Figure 5

DNP-enhanced 1H MAS NMR spectrum of 2H-FD based on the endogenous SQ radical as the source of polarization. The signal collected with microwave pre-irradition of 500 s (upper trace) is compared to the signal obtained with a simple 500 s delay (lower trace) for the same sample. Spectra were collected at 90 K at a field position corresponding to DNP(+) in Figure 4, spinning at ωr/2π = 3 kHz, as described in the Methods section.