Time-Resolved ESR Study of Chromium(III) Complexes in the Ground State

Takashi Ikagawa; Takuhiro Otsuka; Youkoh Kaizu

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Time-Resolved ESR Study of Chromium(III) Complexes in the Ground State

机译：基态铬（III）配合物的时间分辨ESR研究

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The time-resolved ESR (TR-ESR) signals of ground-state (~4A_(2g)) of Cr(III) ion were observed in ruby and of Cr(acac)_3 doped in Al(acac)_3 single crystals after irradiation with the second harmonic of a Nd : YAG laser at 77 K. At room temperature, TR-ESR signal was observed in ruby, but not in Cr(acac)_3. Both spectra at 77 K were of the emissive type; however, the intensity of the Cr(acac)_3 signal was very weak. The observed TR-ESR signal in ruby was changed from emissive polarity to an absorptive one at 700 μs. The results of ruby and Cr(acac)_3 doped in Al(acac)_3 were explained by the initial emissive polarization and the recovery absorptive polarization from the excited state ~2E. The spin polarization in the sublevels of the ground state was very long (about 500 μs).

机译：在红宝石中观察到Cr（III）离子的基态（〜4A_（2g））的时间分辨ESR（TR-ESR）信号，在辐照后观察到Al（acac）_3单晶中掺杂的Cr（acac）_3 Nd：YAG激光的二次谐波在77K。在室温下，在红宝石中观察到TR-ESR信号，但在Cr（acac）_3中未观察到。 77 K处的两个光谱均为发射型。但是，Cr（acac）_3信号的强度非常弱。红宝石中观察到的TR-ESR信号在700μs时从发射极性变为吸收性极性。掺杂在Al（acac）_3中的红宝石和Cr（acac）_3的结果由初始发射极化和从激发态〜2E恢复的吸收极化解释。基态子级的自旋极化非常长（约500μs）。

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《The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory》 |1998年第3期|共5页
作者
Takashi Ikagawa; Takuhiro Otsuka; Youkoh Kaizu;
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中图分类物理化学（理论化学）、化学物理学;
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1. Time-Resolved ESR Study of Chromium(III) Complexes in the Ground State [J] . Takashi Ikagawa, Takuhiro Otsuka, Youkoh Kaizu The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory . 1998,第3期

机译：基态铬（III）配合物的时间分辨ESR研究
2. Femtosecond time-resolved photo-absorption studies on the excitation dynamics of chromium(III) porphyrin complexes in solution [J] . Inamo M, Okabe C, Nakabayashi T, Chemical Physics Letters . 2007,第4a6期

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3. Femtosecond time-resolved photo-absorption studies on the excitation dynamics of chromium(III) porphyrin complexes in solution [J] . Inamo M, Okabe C, Nakabayashi T, Chemical Physics Letters . 2007,第4a6期

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4. X-Ray Diffraction, FTIR, UV-VIS And SEM Studies On Chromium (III) Complexes [C] . Ashutosh Mishra, Jagrati Dwivedi, Kritika Shukla DAE Solid State Physics Symposium . 2015

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5. Biochemistry of chromium(VI) reduction: Formation, fate, and implications of soluble organo-chromium(III) complexes on the biogeocycle of chromium. [D] . Puzon, Geoffrey J. 2004

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Time-Resolved ESR Study of Chromium(III) Complexes in the Ground State

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