Development of Vector ESR Spectrometer with Multiple Modulation Protocol

多调制协议矢量ESR光谱仪的研制

• 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
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02555001/
• 关键词: Vector ESR; Amplitude Spectrum; Phase Spectrum; Multiple Modulation; Saturation Transfer; マルチ変調; ベクトルESR分光法

(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)对饱和转移(ST)电子顺磁共振波谱进行了系统的分析，将观测到的吸收信号分离为幅度谱和相位谱，或分离为同相谱和ST谱。我们建立了一个相位参考程序，用高功率相位最大值法取代了低功率相位零点法。这是对第二次谐波吸收显示的峰间高度和单次积分作为调制相位的函数正弦变化的发现的扩展[Y.Shimyama和H.Watari，App.分光度计。39,170(1985)]。基于峰间高度的正弦变化，我们找到了每个磁场的相移，并可以估计信号矢量的幅度和相位。单次积分值的正弦变化使得吸收信号可以分离为同相和ST谱。高功率最大相位法提供了一种相位设置问题…的补救方法矢量电子顺磁共振波谱(V-EPR)被成功地应用于定向脂质多层膜中，探索了慢动作域中多层膜中涨落的各向异性动力学。V-EPR准确地分析了凝胶相中的慢各向异性运动。在定向脂膜中首次发现了分子涨落相关时间的各向异性结构，表明各向异性既存在于脂运动的大小上，也存在于时间常数上。在多层膜的凝胶相中，轴向旋转比摆动更占优势。(3)矢量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流纹岩中的石英部分。通过完全抑制OHC信号，选择性地检测到了E‘中心信号，从而产生了用于定年定量测定的明确的孤立光谱。磁场调制的相位变化允许检测选择性信号。这利用了在E‘中心的驰豫过程中发生的饱和转移。较少

项目成果

Y.SHIMOYAMA,M.KATO,H.WATARI,R,H,Crpeau and J.H.Freed: "Pulse EPR Spectrocsopy of Synthetic Melanins" Report Pnogress in Polymer Physics in Japan. 35. 599-602 (1992)

Y.SHIMOYAMA、M.KATO、H.WATARI、R、H、Crpeau 和 J.H.Freed：“合成黑色素的脉冲 EPR 光谱”报告日本高分子物理学 Pnogress。

Y.Shimoyama, M.Kato, H.Watari, R.H.Crepeau and J.H.Freed: "Pulse ESR Spectroscopy of Synthetic Melanins" Report on Progress in Polymer Physics in Japan. 85. 597-602 (1992)

Y.Shimoyama、M.Kato、H.Watari、R.H.Crepeau 和 J.H.Freed：“合成黑色素的脉冲 ESR 光谱”日本高分子物理学进展报告。

Y.Shimoyama,O.Ichikawa and H.Watari: "Vector Saturation Transfer ESR Studies of Coal" FUEL. 69. 1237-1242 (1990)

Y.Shimoyama、O.Ichikawa 和 H.Watari：“煤的矢量饱和传递 ESR 研究”燃料。

Y.Shimoyama: "Pulse EPR Spectroscopy of Synthetic Melanins" Repot on Progress in Polymer Physics in Japan. 35. 599-602 (1992)

Y.Shimoyama：“合成黑色素的脉冲 EPR 光谱”关于日本高分子物理学进展的报告。

Y.Shimoyama and H.Watari: "Anisotropic Dynamics in an Oriented Lipid Multibilayer Revealed by Vector EPR Spectroscopy" Springer Verlag(Ed.Onuki and Kawasaki), 223 (1990)

Y.Shimoyama 和 H.Watari：“矢量 EPR 光谱揭示的定向脂质多层中的各向异性动力学”Springer Verlag（Ed.Onuki 和 Kawasaki），223 (1990)