Strrcture determination of high-temperature species with a combined measurement system of a mass filter and a submillimeterwave spectrometer
| Project/Area Number |
07454150
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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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 | Shizuoka University |
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Principal Investigator |
TANIMOTO Mitsutoshi Shizuoka University, Faculty of Science, professor, 理学部, 教授 (40207197)
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| Co-Investigator(Kenkyū-buntansha) |
OKABAYASHI Toshiaki Shizuoka University, Faculty of Science, Assistant, 理学部, 助手 (70224045)
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| Project Period (FY) |
1995 – 1997
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| Project Status |
Completed (Fiscal Year 1997)
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| Budget Amount *help |
¥7,900,000 (Direct Cost: ¥7,900,000)
Fiscal Year 1997: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1996: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1995: ¥5,000,000 (Direct Cost: ¥5,000,000)
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| Keywords | mass filter / microwave spectroscopy / submillimeterwave / high temperature molecule / unstable molecule / radical |
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| Research Abstract |
1. Identification of a high-tempoerature species with a mass filter
A quadrupole mass spectrometer, which can measure the mass spectrum up to m/z-400, was combined with a system, in which unstable species were produced. We developed a computer program with which a measured mass spectrum could be processed. Maleic anhydride and trimethylboroxine was pyrolyzed to form short-lived molecules.
2. Measurement of submillimeter spectra
We measured spectra of metal-containing molecules with high spin multiplicity. Metal was supplied from electrodes by way of supttering. For a chlorine containing molecule low vapor pressure molecule like aluminium trichloride was suitabl e as a sputtering molecule. In this method of production we were able to observe the spectra of CrCl (X^6SIGMA^+), FeCl (^6DELTA_<iota>), CrF (X^6SIGMA^+), CoF (X^3PHI) and NiF (^2II_<3/2>, ^2SIGMA^+). For chromium compounds we discussed the contribution of electronically excited states to spin-spin and spin-rotation interactions. For NiF the electronic ground state was found to be ^2II_<3/2> on the basis of the rotational angular momentum dependence of the LAMBDA-type doubling splitting. The very large splitting suggested that the electronically excited ^2SIGMA^+ state is not far distant from the ground state. For CoF the transition for the OMEGA = 4 spin component was observed and the hyperfine interaction constant was determined. The spectrum of NBr and NI radicals was observed and the ionicity of the bonding was discussed from the nuclear quadrupole moment of halogen atoms. Short lived boron compounds, BBr and BBrO,were observed by discharging BBr_3 with and without oxygen, respectively.
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Report
(4 results)
Research Products
(17 results)
