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. Author manuscript; available in PMC: 2014 Sep 17.
Published in final edited form as: Acc Chem Res. 2013 Apr 18;46(9):1933–1941. doi: 10.1021/ar300348n

Figure 1.

Figure 1

Polarizing agents commonly used for high field DNP experiments. (a) narrow line radicals trityl and BDPA used for the SE; (b) TEMPO based biradicals TOTAPOL and bis-TEMPO-bis-ketal (bTbk) used for the CE.