1988 Fiscal Year Final Research Report Summary
Study on ionization of nonvolatile compounds and reactions of their ions in a gas phase.
| Project/Area Number |
60430007
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| Research Category |
Grant-in-Aid for General Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
有機化学一般
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| Research Institution | The University of Electro-Communications |
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Principal Investigator |
OHASHI Mamoru The University of Electro-Communications, 電気通信学部, 教授 (70015535)
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| Co-Investigator(Kenkyū-buntansha) |
KYUSHIN Soichiro The University of Electro-Communications, 電気通信学部, 助手 (40195392)
YAMADA Shuzo The University of Electro-Communications, 電気通信学部, 助教授 (50090535)
TSUJIMOTO Kazuo The University of Electro-Communications, 電気通信学部, 助教授 (50017414)
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| Project Period (FY) |
1985 – 1988
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| Keywords | SIMS / Linked Scan / MIKES / Halobacterium halobium / Choline halides / In-beam EIMS / Phosphatidylcholines / スフィンゴ脂質 |
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| Research Abstract |
1. Developments in In-beam EI MassSpectrometry: (1) In-beam EI mass spectra of 1.2-diacylphosphatidylcholines exhibited not noly MH^+ but also diagnostic fragment peaks reflecting their sturctures. Based on their relative abundance the positional isomers were discriminated. (2) In-beam EI techique was demonstrated to be quite useful for characterization of nucleosides and monosaccharides. (3) A combination of In-beam EI and MIKES techniques was shown to be quite powerful for elucidation of fragmentation processes of choline and quaternary ammonium salts.
2. Developments in Liquid SIMS Mass Spectrometry: (1) The major component of lipids of Halobacterium halobium was clarified to be a methyl ester of phosphatidylglycerophosphate on the basis of liquid SIMS spectra couples with MS/MS methods. (2) The ion bombardment induced chemical reactions in a matrix have been revealed in the cases of choline and acetylcholine halides on the basis of analysis of their cluster ions by use of liquid SIMS/linked scan techniques. (3) The SIMS spectra of charge-transfer complexes were measured and oxidation-reduction reactions in m-NBA matrix were demonstrated.
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