Satellite structure of DNP enhanced 13C NMR spectra in diamond
Satellite structure of DNP enhanced 13C NMR spectra in diamond
复制标题
金刚石中 DNP 增强 13C NMR 谱的卫星结构
DOI:
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发表时间:
1999
期刊:
影响因子:
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通讯作者:
M. Hoch
中科院分区:
文献类型:
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作者:
G. J. Hill;J. Wu;M. Hoch
The P1 nitrogen defect centres in natural type Ia diamonds have been exploited in dynamic nuclear polarization (DNP) of the 13C nuclei (1.1% abundant) via the solid-effect. We have achieved sufficiently large 13C polarizations in some diamonds to observe weak satellite lines in the 13C NMR spectra by using long microwave irradiation times. A study of the dependence of the NMR spectra on the crystal orientation with respect to the applied magnetic field reveals that the satellite structure originates from the small fraction of 13C nuclei that are involved in nearest neighbour dipole interactions.