Magneto-optical Characterization and In Situ Observation of Adsorbed Species at Electrode/Solution Interfaces
| Project/Area Number |
03453044
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
分析・地球化学
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| Research Institution | Tokyo College of Pharmacy |
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Principal Investigator |
TAKAMURA Kiyoko Tokyo College of Pharmacy, Professor, 薬学部, 教授 (40057302)
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| Co-Investigator(Kenkyū-buntansha) |
KUSU Fumiyo Tokyo College of Pharmacy, Assistant professor, 薬学部, 構師 (70057371)
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| Project Period (FY) |
1991 – 1992
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| Project Status |
Completed (Fiscal Year 1992)
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| Budget Amount *help |
¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1992: ¥1,000,000 (Direct Cost: ¥1,000,000)
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| Keywords | Magneto-optical rotation / Electrolysis / Adsorption / Electrode surface / Adatom / Optically transparent electrode / Optical rotation / Nucleic acid related compound |
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| Research Abstract |
Magneto-optical rotation ( MOR ) measurements have been made in the adsorption studies on optically transparent Au and SnO_2 electrodes for the first time in the present research. Changes in angle of MOR ( phi ) of the electrode surfaces were measured during controlled potential electrolysis. The obtained results are as follows : ( 1 ) The MOR changes were observed for adatom and bulk layers of Pb and Bi formed on Au at more positive and negative potentials than at the standard redox potential of M^<n+>/M^o. From the potential and wavelength dependence of phi, differences in magneto-optical properties between the adatom and the bulk layers could be recognized. ( 2 ) The adsorption of adenine and related compounds, and metalloenzymes such as hemoglobin and vitamine B_<12> also caused marked changes in phi, depending on the applied potential.
In situ observation of the adsorption was extended to solid electrodes by using electro-optical reflection method. The results obtained are : ( 1 ) The validity of the MOR data was verified by comparison with the reflection data for the adsorption of above-mentioned substances on an Au electrode. ( 2 ) Based on the reflection data, a glassy carbon electrode could be successfully applied to the electrochemical detector in HPLC for the analysis of biological components. ( 3 ) The reflection method was also applied to an examination of interactions between dental alloys and oral germicidal drugs. The method will serve as a novel stability test of dental alloys in oral cavity.
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Report
(3 results)
Research Products
(15 results)
