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ファラデー効果による開殻分子の光学的電子スピン制御

法拉第效应对开壳层分子的光学电子自旋控制

基本信息

批准号：
12740310
负责人：
生駒忠昭
金额：
$ 1.47万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Encouragement of Young Scientists (A)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

项目摘要

平成13年度は、前年度に組み上げた時間分解電子常磁性共鳴(EPR)検出型ファラデー実験装置を用いて幾つかの化合物を対象に実験を試みた。スピン二重項である安定な中性ラジカルとして、2,2,6,6-テトラメチルピペリジン-1ーオキシル(TEMPO)ラジカルおよび2,2,6,6-テトラメチル-4-ヒドロキシピペリジン-1ーオキシル(TANOL)ラジカルについて磁気光学効果実験を行った。酸素による影響を避けるために3mMの試料濃度に調整したエタノール溶液を真空ライン内で脱気処理した後、室温においてファラデー効果の測定を行った。ナノ秒YAGレーザーの第2高調波(532nm)を励起光源として用いた。ラジカルのスピン副準位間の占有数差(スピン分極)を検出するため、安定ラジカルからの応答信号である自由誘導減衰(FID)あるいは電子スピンエコー(ESE)をナノ秒パルスマイクロ波を用いて観測した。右回り偏光励起を行ったときの応答信号と左回り偏光励起時の信号の強度変化を調べたところ、どの中性ラジカルについても有意な偏向方向依存性は認められなかった。そこで、イオン性の有機ラジカルであるペリレンカチオンラジカルについて同様な実験を行った。しかしながら、この場合も明瞭な磁気光学効果が観測されなかった。有機分子のスピン軌道相互作用が小さいことが磁気光学効果を起こしにくい原因と考え、S=1/2である銅二価イオン(CuSO_4, CuCl_2)について測定を行った。しかし、これらの無機イオンの室温中におけるスピン横緩和が装置の不感時間よりも短いため、EPR信号自身を捕らえることができなかった。

In 2013, the group was divided into two groups: the first group was divided into three groups: the first group was divided into three groups: the second group was divided into three groups: the first group was divided into three groups: the first group was divided into three groups: the second group was divided into three groups: the first group was divided into three groups: the first group was divided into three groups: the second group was divided into three groups: the first group was divided into three groups: the second group was divided into three groups: the first group was divided into three groups: the first group was divided into three groups: the second group was divided into three groups: the first group was divided into three groups: the first group was divided into three groups: the second group was divided into three groups: the first group was divided into three groups: the second group was divided into three groups: the first group was divided into three groups; the third group was divided into three groups: the first group was divided into three groups; the second group was divided into three groups; the third group was divided into three groups; the third The binary term of TEMPO is 2,2,6,6-parameter, 2,2,6,6-parameter, 2,2,6,6-parameter, 4-parameter, 1-parameter, 1-parameter, 1 The effect of acid on the sample concentration was adjusted to 3mM, and the results were determined after vacuum treatment and room temperature treatment. The second high-wavelength (532nm) of YAG laser is excited by light source. The occupancy difference between the sub-levels of the spectrum is measured by the free induced attenuation (FID) of the response signal and the stable spectrum. The intensity of the signal at the time of the polarization excitation of the right loop is adjusted, and the neutral loop is adjusted. All kinds of activities are organized according to the nature of the activity. In this case, the magnetic and optical effects are clearly detected. The reason why the magnetic and optical effects of organic molecules arise is investigated. The determination of CuSO_4, CuCl_2 is carried out when S=1/2. The EPR signal itself is detected at room temperature.