中国物理B ›› 1998, Vol. 7 ›› Issue (2): 106-114.doi: 10.1088/1004-423X/7/2/003

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

DYNAMIC NUCLEAR POLARIZATION OF ORGANIC COMPOUND DOPED WITH FREE RADICALS

杨保联1, 冯继文1, 周建威1, 李丽云1, 叶朝辉1, 胡建治2, RONALD J.PUGMIRE2, DAVID M.GRANT2   

  1. (1)Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Academia Sinica, Wuhan 430071, China; (2)University of Utah, Salt Lake City, UT 84112, USA
  • 收稿日期:1997-06-11 出版日期:1998-02-20 发布日期:1998-02-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China and the NEDO's International Joint Research Program of Japan.

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   

  1. 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
  • Received:1997-06-11 Online:1998-02-20 Published:1998-02-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China and the NEDO's International Joint Research Program of Japan.

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摘要： 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.

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.

中图分类号:  (Double nuclear magnetic resonance (DNMR), dynamical nuclear polarization)

  • 76.70.Fz
76.60.Es (Relaxation effects) 61.72.up (Other materials)