Development of Vector ESR Spectrometer with Multiple Modulation Protocol

多调制协议矢量ESR光谱仪的研制

基本信息

批准号：
02555001
负责人：
MATSUKI Kiyoshi
金额：
$ 4.48万
依托单位：
Hokkaido University of Education, Hakodate
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1992
项目状态：
已结题

项目摘要

(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

（1）开发了饱和转移（ST）电子顺磁共振光谱的系统分析，以将观察到的抽象信号分离为放大器和相光谱或相位频谱或同相和ST光谱。我们建立了一个相参考过程，用高功率相的最大方法替换了低功率相无效方法。这是发现，第二个谐波抽象显示随着调制阶段的函数的变化而变化的发现[y.shimoyama and H.Watari，appl。光谱。 39，170（1985）]。基于峰峰高度的正弦变化，我们在每个磁场处发现一个相移，并可以评估信号矢量的放大器和相位。单个积分值的正弦变化使抽象信号可以分为同相和ST光谱。 The high-power phase maximum Method provides a remindy of the phase setting problem … More em in ST spectroscopy by which the in-phase signal can be detected at any microwave field.(2) Vector electronic 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 领域。 V-EPR准确地分析了凝胶相的慢速各向异性运动。在定向的脂质膜中首次发现了分子波动相关时间的各向异性结构，表明各向异性在脂质运动的大小和时间常数中都存在。轴向旋转比在多重膜膜的凝胶相中摇摆更为主导。（3）载体电子顺磁共振光谱检测到的饱和转移现象已成功地应用于花岗岩和节奏的石英分裂。通过完全抑制OHC信号，可以选择性地检测到E'中心信号，从而导致定义明确的分离光谱以进行定量确定约会。磁场调制相的变化允许检测选择性信号。这利用了在E'中心放松过程中发生的饱和转移。较少的