| Project/Area Number |
16550006
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Physical chemistry
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| Research Institution | Saitama University |
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Principal Investigator |
WAKASA Masanobu Saitama University, Faculty of Science, Associate Professor, 理学部, 助教授 (40202410)
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| Project Period (FY) |
2004 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2005: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2004: ¥2,300,000 (Direct Cost: ¥2,300,000)
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| Keywords | Magnetic Field Effect / Pulsed Magnet / Chemical Reaction / Transient Absorption / Laser Flash Photolysis / Relaxation Mechanism / Δg Mechanism / Radical Pair |
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| Research Abstract |
An water-cooled pulsed magnet which had a room temperature bore with a diameter of 20 mm was newly constructed. Magnetic field effects on a triplet sensitization reaction of p-aminophenyl disulfide (APDS) with xanthone (Xn) were studied in a sodium dodecylsulfate (SDS) micellar solution by a nanosecond laser flash photolysis technique under ultrahigh magnetic fields of up to 28 T. Upon irradiation of the SDS micellar solution containing APDS and Xn, triplet radical pairs of p-aminophenylthiyl radicals were generated. The yield of the escaped p-aminophenylthiyl radical was found to decrease by 6±2 % at 28 T compared with that at 0 T. The observed MFEs can be qualitatively explained by the RM together with slow spin conversion at 0 T. The spin relaxation rates were calculated using adequate parameter set. The magnetic field dependence of the calculated relaxation rate can reproduce the observed MFEs on the yield of escaped p-aminophenylthiyl radical.
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