Abstract
Replacement of protons by deuterons in the glassing solvents led to 2-3-fold improvement of the (13)C dynamic nuclear polarization (DNP) solid-state NMR signal for samples doped with large electron spin resonance (ESR) linewidth free radicals galvinoxyl, DPPH, and 4-oxo-TEMPO. Meanwhile, the reverse effect is observed for (13)C DNP using small ESR linewidth free radicals BDPA and trityl OX063.
Publication types
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Research Support, N.I.H., Extramural
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Research Support, Non-U.S. Gov't
MeSH terms
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Allyl Compounds / chemistry*
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Benzhydryl Compounds / chemistry*
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Biphenyl Compounds / chemistry*
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Cyclic N-Oxides / chemistry*
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Deuterium / chemistry*
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Electron Spin Resonance Spectroscopy
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Magnetic Resonance Spectroscopy / methods*
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Picrates / chemistry*
Substances
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Allyl Compounds
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Benzhydryl Compounds
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Biphenyl Compounds
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Cyclic N-Oxides
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Picrates
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bis-diphenylene-phenyl-allyl
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Deuterium
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1,1-diphenyl-2-picrylhydrazyl
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TEMPO
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galvinoxyl