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The efficiency of DPPH as a polarising agent for DNP-NMR spectroscopy.

RSC advances

Lumata L, Merritt M, Khemtong C, Ratnakar SJ, van Tol J, Yu L, Song L, Kovacs Z.
PMID: 23205273
RSC Adv. 2012 Jan 01;2(33):12812-12817. doi: 10.1039/C2RA21853D. Epub 2012 Oct 25.

The free radical 2,2-diphenyl-1-pycrylhydrazyl (DPPH) was tested as a polarising agent for fast dissolution dynamic nuclear polarisation (DNP) NMR spectroscopy. DPPH was found to be reasonably soluble in sulfolane and the optimum concentration for DNP is 20-40 mM depending...

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