F. Horii, T. Idehara, Y. Fujii, I. Ogawa, A. Horii, G. Entzminger, F. D. Doty
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引用次数: 4
摘要
131.5 GHz回旋管(gyrotron FU CW IV)动态核极化(DNP)采用稳定的单自由基4-氨基- tempo进行200 MHz高分辨率固态核磁共振波谱分析，获得了30左右的增强因子。研究了辐照时间、辐照功率、冷却时间和辐照频率对增强系数的影响。简要介绍了200 MHz DNP核磁共振波谱在聚合物表面分析中的应用。
200 MHz DNP NMR spectroscopy with a 131 GHz gyrotron for the analysis of polymer surface
Dynamic nuclear polarization (DNP) with a 131.5 GHz gyrotron (Gyrotron FU CW IV) has achieved enhancement factor of around 30 by using stable mono-radical 4-amino-TEMPO for 200 MHz high-resolution solid-state NMR spectroscopy for the analysis of polymer surface. Dependencies of the enhancement factor on irradiation time of the gyrotron output, the power of irradiation, cooling time, and irradiation frequency are examined. Application of the 200 MHz DNP NMR spectroscopy to the analysis of polymer surface is also presented briefly.
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