High Field Dynamic Nuclear Polarization NMR with Surfactant Sheltered Biradicals
Author(s)Kiesewetter, Matthew K.; Michaelis, Vladimir K.; Walish, Joseph John; Griffin, Robert Guy; Swager, Timothy M
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We illustrate the ability to place a water-insoluble biradical, bTbk, into a glycerol/water matrix with the assistance of a surfactant, sodium octyl sulfate (SOS). This surfactant approach enables a previously water insoluble biradical, bTbk, with favorable electron–electron dipolar coupling to be used for dynamic nuclear polarization (DNP) nuclear magnetic resonance (NMR) experiments in frozen, glassy, aqueous media. Nuclear Overhauser enhancement (NOE) and paramagnetic relaxation enhancement (PRE) experiments are conducted to determine the distribution of urea and several biradicals within the SOS macromolecular assembly. We also demonstrate that SOS assemblies are an effective approach by which mixed biradicals are created through an assembly process.
DepartmentMassachusetts Institute of Technology. Department of Chemistry; Francis Bitter Magnet Laboratory (Massachusetts Institute of Technology)
Journal of Physical Chemistry B
American Chemical Society (ACS)
Kiesewetter, Matthew K., Vladimir K. Michaelis, Joseph J. Walish, Robert G. Griffin, and Timothy M. Swager. “High Field Dynamic Nuclear Polarization NMR with Surfactant Sheltered Biradicals.” The Journal of Physical Chemistry B 118, no. 7 (February 20, 2014): 1825–1830.
Final published version