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- 伊藤 繁和
- 東京工業大学物質理工学院応用化学系
書誌事項
- タイトル別名
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- Investigation of Organic Molecules Using Elementary Subatomic Particle: Muon Spin Spectroscopy for Reaction Analysis of the Open-Shell Singlet Heterocycle
抄録
<p>The positive muon (µ+) is an elementary subatomic particle that is assigned as a member of lepton (spin I=1/2). Whereas muons are present in cosmic radiation, high-energy beam of proton from accelerators such as cyclotron and synchrotron produce almost fully polarized muons. The muon has one ninth of the proton mass (0.1126mp), and the polarized “ultralight proton” is applicable to similar spectroscopic analyses to electron-spin resonance (ESR) and nuclear magnetic resonance (NMR) without the alternative magnetic resonance techniques. In contact with matter, the positive muon captures an electron and become a muonium (Mu= [µ+e-]) that is a light isotope of hydrogen atom. The muoniums have been utilized for monitoring radical reactions of usual unsaturated organic molecules including benzene, alkene, alkyne, and ketone, and the corresponding radicals via muonium addition can be characterized by muon spin rotation/resonance/relaxation (µSR) spectroscopy. In this article, principles and usefulness of µSR for study of functional organic compounds are overviewed, and our recent findings on µSR measurements for the sterically encumbered 1,3-diphosphacyclobutane-2,4-diyl of singlet biradical are presented. A regioselective addition of muonium to the skeletal phosphorus atom in the 1,3-diphosphacyclobutane-2,4-diyl unit was characterized, which would be useful to understand the 4-membered heterocyclic molecular skeleton promoting the low-voltage p-type organic semiconductor behavior.</p>
収録刊行物
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- 有機合成化学協会誌
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有機合成化学協会誌 77 (8), 800-812, 2019-08-01
公益社団法人 有機合成化学協会
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詳細情報 詳細情報について
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- CRID
- 1390282763132905088
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- NII論文ID
- 130007689062
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- ISSN
- 18836526
- 00379980
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
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- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可