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装置的构建及其研究应用取得了以下成果： 1．为了提高W波段EPR系统的时间分辨率，我们购买了宽带放大器，将阻抗匹配到2000，实现了小于5纳秒的时间分辨率，并减少了信号的损耗。 2.我们将该高频EPR机应用于激发多重态的研究，获得了激发态动力学和自旋弛豫的数据。 3．我们还首次在激发三重态自由基系统的激发多重态的热平衡条件下获得了 EPR 信号。根据多重态之间的能量差和交换相互作用参数 J.4 更容易分析此类光谱。现在，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可以轻松分析偏振光谱。5。利用这些数据（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），我们成功地减去了决定两种不同异构体自由基激发三重态系统中激发态性质的重要因素。

项目成果

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

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.

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