DYNAMIC NUCLEAR POLARIZATION OF ORGANIC COMPOUND DOPED WITH FREE RADICALS
YANG BAO-LIAN (杨保联)a, FENG JI-WEN (冯继文)a, ZHOU JIAN-WEI (周建威)a, LI LI-YUN (李丽云)a, YE CHAO-HUI (叶朝辉)a, HU JIAN-ZHI (胡建治)b, RONALD J.PUGMIREb, DAVID M.GRANTb
a Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Academia Sinica, Wuhan 430071, China; b University of Utah, Salt Lake City, UT 84112, USA
Abstract For those organic compounds which lack free radicals, a doping approach named melting-liquid-nitrogen-quench was developed in order to perform dynamic nuclear polarization(DNP)-nuclear magnetic resonance experiments. By using this method, the 1H, 13C, 15N DNP enhancements were observed with free-radical-doped dibenzofuran and benzamide. The enhancement mechanism and relation between the concentration of unpaired electrons and the maximum DNP enhancement are discussed.
Received: 11 June 1997
Accepted manuscript online:
PACS:
76.70.Fz
(Double nuclear magnetic resonance (DNMR), dynamical nuclear polarization)
Fund: Project supported by the National Natural Science Foundation of China and the NEDO's International Joint Research Program of Japan.
Cite this article:
YANG BAO-LIAN (杨保联), FENG JI-WEN (冯继文), ZHOU JIAN-WEI (周建威), LI LI-YUN (李丽云), YE CHAO-HUI (叶朝辉), HU JIAN-ZHI (胡建治), RONALD J.PUGMIRE, DAVID M.GRANT DYNAMIC NUCLEAR POLARIZATION OF ORGANIC COMPOUND DOPED WITH FREE RADICALS 1998 Acta Physica Sinica (Overseas Edition) 7 106
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