Title | High-field (13)c dynamic nuclear polarization with a radical mixture. |
Publication Type | Journal Article |
Year of Publication | 2013 |
Authors | Michaelis, VK, Smith, AA, Corzilius, B\örn, Haze, O, Swager, TM, Griffin, RG |
Journal | Journal of the American Chemical Society |
Volume | 135 |
Pagination | 2935–8 |
Date Published | feb |
ISSN | 1520-5126 |
Keywords | High Field carbon 13 dynamic nuclear polarization |
Abstract | We report direct (13)C dynamic nuclear polarization at 5 T under magic-angle spinning (MAS) at 82 K using a mixture of monoradicals with narrow EPR linewidths. We show the importance of optimizing both EPR linewidth and electron relaxation times by studying direct DNP of (13)C using SA-BDPA and trityl radical, and achieve (13)C enhancements above 600. This new approach may be best suited for dissolution DNP and for studies of (1)H depleted biological and other nonprotonated solids. |
URL | http://www.ncbi.nlm.nih.gov/pubmed/23373472 |
DOI | 10.1021/ja312265x |