Michaelis, V.K., et al., Dynamic Nuclear Polarization of Oxygen-17. The Journal of Physical Chemistry Letters, 2012: p. 2030-2034.
Oxygen-17-detected DNP NMR of a water/glycerol glass enabled an 80-fold enhancement of signal intensity at 82 K, using the biradical TOTAPOL. The >6000-fold savings in acquisition time enable 17O?1H distance measurements and heteronuclear correlation experiments. These experiments are the initial demonstration of the feasibility of DNP NMR on quadrupolar 17O.