使用 Frank 序列进行脉冲 EPR。
Use of the Frank sequence in pulsed EPR.
机构信息
Department of Chemistry and Biochemistry, University of Denver, Denver, CO 80208, USA.
出版信息
J Magn Reson. 2011 Apr;209(2):306-9. doi: 10.1016/j.jmr.2011.01.032. Epub 2011 Feb 3.
Abstract
The Frank polyphase sequence has been applied to pulsed EPR of triarylmethyl radicals at 25 6 MHz (9.1 mT magnetic field), using 256 phase pulses. In EPR, as in NMR, use of a Frank sequence of phase steps permits pulsed FID signal acquisition with very low power microwave/RF pulses (ca. 1.5 mW in the application reported here) relative to standard pulsed EPR. A 0.2 mM aqueous solution of a triarylmethyl radical was studied using a 16 mm diameter cross-loop resonator to isolate the EPR signal detection system from the incident pulses.
摘要
已将弗兰克多相序列应用于在 256 MHz（9.1 mT 磁场）下的三芳基甲基自由基的脉冲 EPR，使用 256 个相脉冲。在 EPR 中，与标准脉冲 EPR 相比，与使用非常低功率微波/RF 脉冲（在此应用中约为 1.5 mW）相对应，使用弗兰克相步序列可以实现脉冲 FID 信号的采集。研究了浓度为 0.2 mM 的三芳基甲基自由基的水溶液，使用 16mm 直径的十字环谐振器将 EPR 信号检测系统与入射脉冲隔离开来。
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