Development of Vector ESR Spectrometer with Multiple Modulation Protocol

(1)饱和转移（ST）的电子顺磁共振光谱的系统分析开发分离到一个振幅和一个相位谱或到一个同相和ST光谱的吸收信号。我们建立了一个相位参考程序，取代低功耗的相位零点的方法，高功率相位最大值的方法。这是发现的延伸，即第二谐波吸收显示的峰到峰高度和单个积分作为调制相位的函数正弦地变化[Y.Shimoyama和H.瓦塔里，Appl. Spectrosc. 39，170（1985）]。基于峰间高度的正弦变化，我们发现每个磁场处的相移，并且可以评估信号矢量的幅度和相位。单个积分值的正弦变化允许吸收信号被分离成同相和ST光谱。大功率相位最大值法解决了相位整定问题， ...更多信息 em在ST光谱学中，通过它可以在任何微波场检测到同相信号。(2)矢量电子顺磁共振波谱（V-EPR）被成功地应用到一个取向的脂质多层膜，探讨在慢运动域的波动在多层膜的各向异性动力学。V-EPR准确地分析了凝胶相中的缓慢各向异性运动。首次在定向脂膜中发现了分子涨落相关时间的各向异性结构，表明脂运动的幅度和时间常数均存在各向异性。在多层膜的凝胶相中，轴向旋转比摆动更占主导地位。(3)矢量电子顺磁共振波谱法检测到的饱和转移现象已成功地应用于花岗岩和流纹岩中的石英组分。通过完全抑制OHC信号，选择性地检测E'中心信号，从而产生用于定量测定年代的良好限定的分离光谱。磁场调制的相位的变化允许检测选择性信号。这利用了在E'中心的弛豫过程期间发生的饱和转移。少

(1) A systematic analysis of saturation transfer (ST) electron paramagnetic resonance spectroscopy was developed to separate an observed absorption signal either into an amplitude and a phase spectrum or into an in-phase and an ST spectrum. We established a phase reference procedure, replacing the low-power phase null method by a high-power phase maximum method. This is an extension of the finding that a peak-to-peak height and a single integration of the second harmonic absorption display vary sinusoidally as functions of the modulation phase [Y.Shimoyama and H.Watari, Appl. Spectrosc. 39, 170(1985)]. Based on the sinusoidal variation in the peak-to-peak height, we found a phase shift at each magnetic field and could evaluate the amplitude and phase of a signal vector. The sinusoidal variation of the single integrated value allowed the absorption signal to be separated into an in-phase and an ST spectrum. The high-power phase maximum method provides a remedy of the phase setting probl … More em in ST spectroscopy by which the in-phase signal can be detected at any microwave field.(2) Vector electron paramagnetic resonance spectroscopy (V-EPR) was successfully applied to an oriented lipid multibilayer to explore the anisotropic dynamics of fluctuations in the multibilayer in the slow-motion domain. V-EPR analyzed accurately the slow anisotropic motions in the gel phase. Anisotropic structure in the correlation times of molecular fluctuation was found for the first time in the oriented lipid membranes, indicating that the anisotropy exists in both the magnitude and the time constant of the lipid motion. Axial rotation is more dominant than wobbling in the gel phase of multibilayer membranes.(3) Saturation transfer phenomena as detected by vector electron paramagnetic resonance spectroscopy has been successfully applied to the quartz fraction of granites and rhyolites. The E' center signal has been selectively detected by complete suppression of the OHC signal, thereby resulting in a well defined isolated spectrum for quantitative determination for dating. The variation of the phase of the magnetic field modulation allows the detection of selective signals. This takes advantage of saturation transfer which occurs during the relaxation process of the E' center. Less