Development of the CIDNP Detected ESR Method and the Research on the Short-Lived Paramagnetic Species.

CIDNP检测ESR方法的发展和短命顺磁性物质的研究。

• 批准号: 62430001
• 负责人: AZUMI Tohru
• 金额: $ 15.94万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (A)
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-62430001/
• 关键词: CIDNP; CIDEP; ESR; EPR; Radical pair; Enhancement factor; L-band ESR; Dibenzilketone; 反応中間体; stimulated nuclear polarization; dynamic nuclear polarization; ベンゾキノン; 磁場効果; 化学反応; 光化学反応

The most direct purpose of this research project is to develop the CIDNP detected ESR method as an aid to detect the radical pair. In addition, however, we have other, similarly important purposes: (a) To develop the method to quantitatively measure the CIDNP intensity. (b) To develop the method of analysis from both CIDNP and CIDEP. For all the three points described above, we were able to obtain significant results. They are summarized in the following.1. The method of determining the CIDNP enhancement factor has been established. 2. The mechanism of the photochemical cleavage of benzoyl peroxide is analyzed, and continuous diffusion process is examined. 3. The method to determine the precursor of the photochemical reaction from the CIDNP method is re-examined in terms of the enhancement factor. 4. Magnetic field effect of CIDNP is examined. 5. A new mechanism is proposed in the spin correlated CIDEP mechanism. 6. Exchange interaction is analyzed from both CIDEP and CIDNP. 7. CIDNP detected ESR method has been successfully developed. 8. Low field CIDEP method is established by using L-band ESR spectrometer.

本研究项目最直接的目的是开发CIDNP检测ESR方法，作为检测自由基对的辅助手段。然而，除此之外，我们还有其他同样重要的目的：(a)发展定量测量CIDNP强度的方法。(b)发展综合发展方案和综合发展方案的分析方法。对于上述所有三点，我们能够获得显著的结果。它们总结如下：建立了确定CIDNP增强因子的方法。2. 分析了过氧化苯甲酰光化学裂解机理，考察了连续扩散过程。3. 从增强因子的角度对CIDNP法确定光化学反应前驱体的方法进行了重新检验。4. 研究了CIDNP的磁场效应。5. 在自旋相关CIDEP机理中提出了一种新的机理。6. 从ciddep和CIDNP两个方面分析了交换交互。7. CIDNP检测ESR方法研制成功。8. 利用l波段ESR谱仪建立了低场CIDEP方法。

项目成果

K.A.Al-Hassan: "The Red Edge Effect as a Tool for Investigating the Origin of the anomalous Fluorescence Band of 9,9'-Bianthryl in Rigid Polar Polymer Matrices." Chem.Phys.Lett.150. 344-348 (1988)

K.A.Al-Hassan：“红边效应作为研究刚性极性聚合物基质中 9,9-联苯蒽异常荧光带起源的工具。”

S.Itoh: "The Exchange Interaction in the Radical Pair in 2-Propanol Solution as Studied by the CIDNP Multiplet Pattern." submitted.

S.Itoh：“通过 CIDNP 多重模式研究 2-丙醇溶液中自由基对的交换相互作用。”

K. Al-Hassan and T. Azumi: "Fluorescence Decay Characteristics of 4-Dimethylaminobenzonitrile in Different Polymer Matrices: A Time Resolved Study in the Nanosecond Range." Chem. Phys. Lett. 163, 129-134 (1989).

K. Al-Hassan 和 T. Azumi：“不同聚合物基质中 4-二甲氨基苯甲腈的荧光衰减特性：纳秒范围内的时间分辨研究”。

M. Terazima and T. Azumi: "Measurement of the Quantum Yield of the Triplet Formation of Transient Species by using the Transient Time Resolved Thermal Lens Method." Photoacoustic and Photothermal Phenomena (Springer-Verlag).

M. Terazima 和 T. Azumi：“使用瞬态时间分辨热透镜方法测量瞬态物质三重态形成的量子产率。”

S.Takahashi: The Journal of Physical Chemistry.

S.Takahashi：《物理化学杂志》。