Development of Highly Time-resolved High Frequency EPR and Application to Studies on the Excited States

高时间分辨高频 EPR 的发展及其在激发态研究中的应用

• 批准号: 18559001
• 负责人: SAIFUL Islam
• 金额: $ 2.33万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18559001/
• 关键词: Time-resolved EPR; EPR Apparatus; Excited State; High Time-resolution; High Frequency EPR; Electron Paramagnetic Resonance; 光物性; 化学物理; 磁性; 励起三重項; WバンドESR; 励起高スピン状態; 金属ポルフィリン; フラーレン誘導体; ゼロ磁場分裂

The following results were obtained for the construction of the EPR apparatus and its research applications.1. In order to increase time-resolution of the W-band EPR system, we bought a wide band amplifier, made impedance matching to 2000, and achieved a time resolution of less than 5 nano-seconds and a decrease of the loss of the signals.2. We applied this high frequency EPR machine to the studies of excited multiplet states and obtained data of excited state dynamics and spin relaxations.3. We also obtained EPR signals for the first time under a thermal equilibrium condition in the excited multiplet states of an excited triplet-radical system. Such spectra were more easily analyzed in terms of an energy difference between the multiplet states and an exchange interaction parameter J.4. The polarized spectra are now easily analyzed by using the data obtained above (under a thermal equilibrium condition) in terms of excited state dynamics and spin relaxations.5. With these data (an energy difference between the multiplet states, an exchange interaction parameter J, excited state dynamics, and spin relaxations), we succeeded in subtracting important factors which determine excited state properties in two different isomer radicals-excited triplet systems.

为EPR装置的研制及其应用研究取得了以下成果.为了提高W波段电子顺磁共振系统的时间分辨率，我们购买了宽带放大器，并进行了2000阻抗匹配，使时间分辨率达到了5纳秒以下，同时降低了信号的损耗.我们将这种高频EPR机应用于激发态的研究，获得了激发态动力学和自旋弛豫的数据.在热平衡条件下，我们还首次获得了三重态自由基体系激发多重态的EPR信号。这样的光谱更容易分析的多重态之间的能量差和交换相互作用参数J.4。极化光谱现在很容易分析通过使用上面获得的数据（在热平衡条件下）在激发态动力学和自旋弛豫方面。有了这些数据（多重态之间的能量差，交换相互作用参数J，激发态动力学和自旋弛豫），我们成功地减去重要的因素，确定激发态性质在两个不同的异构体自由基激发三重态系统。

项目成果

Spin Coupling in the Supramolecular Structure of a New Y(Quinoline-TEMO)_4 Complex

新型Y(喹啉-TEMO)_4配合物超分子结构中的自旋耦合

• 发表时间: 2007
• 期刊: Inorg. Chem. 46
• 作者: L. Maretti;et. al.,;Y.Ohba et al.;Maretti et al.
• 通讯作者: Maretti et al.

Assignment of the Central Peaks in Excited triplet Porphyrin- Rdicalsystems by Means of X-and W-band Time-resolved EPR

利用 X 和 W 波段时间分辨 EPR 确定激发三重态卟啉基体系的中心峰

• 发表时间: 2006
• 作者: I. SM. Saiful ;et. al.,;V.F.Tarasov.et al.;L.Maretti et al.;I.SM Saiful et al.;ISM. Saiful;K. Takahashi;K. Takahashi;イスラム サイフル;I SM. Saiful;I.SM. Saiful;I. SM. Saiful;S. Yamauchi;S. Yamauchi;I.SM. Saiful;I. SM. Saiful;I.SM. Saiful;I. SM. Saiful
• 通讯作者: I. SM. Saiful

Substituent Effect on g-Tensor: Multi-frequency ESR Study and DFT Calculation of Polycrystallie Phenoxyl Radical Derivatives in Diamagnetic Crystals

取代基对 g 张量的影响：反磁性晶体中多晶苯氧基自由基衍生物的多频 ESR 研究和 DFT 计算

• 发表时间: 2007
• 期刊: J. Phys. Chem. A., 111
• 作者: T. Yamaji ;et. al.,
• 通讯作者: et. al.,

Spin Coupling in the Supramolecular Structure of a New Tetra (Quinoline-TEMO) Yttrium(III)Complex

新型四（喹啉-TEMO）钇（III）配合物超分子结构中的自旋耦合

• 发表时间: 2007
• 期刊: Inog. Chem., 46
• 作者: L. Maretti ;et. al.,
• 通讯作者: et. al.,

Substituent Effect on g-Tensor: Multi-frequency ESR Study and DFT Calculation of Polycrystalline Phenoxyl Radical Derivatives in Diamagnetic Crystals

取代基对 g 张量的影响：反磁性晶体中多晶苯氧基自由基衍生物的多频 ESR 研究和 DFT 计算

• 发表时间: 2007
• 期刊: Journal of Physical Chemistry A 111
• 作者: Azumi;Tohru;山内清語;山内清語
• 通讯作者: 山内清語