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真空紫外線領域等における円偏光分光とその隕石中 有機物のキラリティの非破壊分析手法としての検証
田中, 真人
Permalink : http://hdl.handle.net/2115/77796
JaLCDOI : 10.14943/lowtemsci.78.295
KEYWORDS : 円二色性;光学活性;キラリティ;不斉光反応;非破壊分析;Circular dichroism;Optical rotatory dispersion;Chirality;Asymmetric photoreaction;Nondestructive analysis
Abstract
隕石中のアミノ酸のキラリティの偏りの検出や宇宙空間での円偏光の観測などの報告から，生体分 子のホモキラリティは宇宙を起源とするという仮説の重要性が高まっている．キラリティの偏りを直 接的かつ非破壊に分析する手法として，円二色性や光学活性などの円偏光を用いた分光手法は有用と 考えられる．本稿では，アミノ酸などが特徴的なスペクトルを示す真空紫外線領域等における円二色 性計測に関する筆者のこれまでの取り組みを紹介するとともに，マイクロビームによる円二色性マッ ピングや光学活性などの分光手法の隕石中のキラリティ分析法としての有効性などに関して報告する．
Spectroscopic techniques using circularly polarized light, such as circular dichroism and optical rotatory dispersion, are considered to be useful as a nondestructive analysis method for the chirality of organic molecules in meteorites. In this paper,wereviewourdevelopmentofacirculardichroismmeasurementsysteminthevacuumUV region using a polarizing undulator, as well as its application to chiral organic molecules, such as amino acids. Moreover, various spectroscopic techniques, such as circular dichroism mapping with a micrometer-scale beam, optical rotatory dispersion, and circular intensity differential scattering, were evaluated as potential nondestructive analysis methods.
Spectroscopic techniques using circularly polarized light, such as circular dichroism and optical rotatory dispersion, are considered to be useful as a nondestructive analysis method for the chirality of organic molecules in meteorites. In this paper,wereviewourdevelopmentofacirculardichroismmeasurementsysteminthevacuumUV region using a polarizing undulator, as well as its application to chiral organic molecules, such as amino acids. Moreover, various spectroscopic techniques, such as circular dichroism mapping with a micrometer-scale beam, optical rotatory dispersion, and circular intensity differential scattering, were evaluated as potential nondestructive analysis methods.
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