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振動円偏光二色性分光法 : Raman光学活性
https://ouj.repo.nii.ac.jp/records/7453
https://ouj.repo.nii.ac.jp/records/745383774afd-cd72-4479-9a03-dc4a8db4acfb
名前 / ファイル | ライセンス | アクション |
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NO_21-201-236 (741.6 kB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2013-06-14 | |||||
タイトル | ||||||
タイトル | 振動円偏光二色性分光法 : Raman光学活性 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Vibrational Circular Dichroism Spectroscopy : Raman Optical Activity | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
著者 |
濱田, 嘉昭
× 濱田, 嘉昭× 新, 佐依子× Hamada, Yoshiaki× Shin, Saeko |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | 著者らは円偏光赤外線を用いた二色性の分光により、光学活性分子の測定と解析を行ってきた。これまで、アルコール類の分子の場合には、無極性あるいは極性の弱い溶媒中に希釈することにより、分子間水素結合を遮断したスペクトルを観測でき、溶液状態での分子構造の研究にはほとんど情報をもたらさないと信じられてきたOH変角振動が振動円偏光二色性(VCD)スペクトルには強い信号となって現れること、その信号の強度や符号が振動モードの観点から解釈できる可能性のあることを示してきた。生体分子の系に振動分光の研究を応用する場合、赤外分光とともにそれに相補的なRaman分光法が有用であることは、多くの研究例によって明らかである。光学活性分子の振動円偏光二色性分光ではROAと呼ばれる分光法がVCDに相補的な分光法ということになる。著者らの研究室では、本年度にこのROA分光装置を導入することになった。そこでこの際、Raman分光法の一般的な原理とROAの理論の概観を行い、導入したROA分光装置でどの程度のスペクトルが測定できるかを検討し、VCDとの比較を行うことにした。この論文はこれらの測定実験の予備的な結果を報告し、将来への理論あるいは新しいモデル構築の基礎となるものとして執筆した。 | |||||
抄録(英) | ||||||
言語 | en | |||||
値 | We have carried over experimental measurements and analyses of optically active molecules by dichroism spectroscopy with circularly polarized infrared light. We discovered the OH bending modes of alcoholic molecules give fairly strong VCD (vibrational circular dichroism) signals when the molecules are dissolved in nonpolar solvent or in solvent of weak polarity where intermolecular hydrogen bonding is shut off. The OH bending infrared band has been believed to be of low value in the study of molecular structure in liquid and in solution because of its weak absorption intensity. We have pointed out that the intensities and signs of VCD signals including the OH bending band can be understood in terms of local vibrational modes and their relative arrangements, which seems to be of potential use not only for analysis of the spectrum but also for prediction of the spectrum of new molecule. It has been recognized through numerous researches that Raman spectroscopy complementary to infrared spectroscopy is useful in the study of biological molecules. The corresponding relation is a method called ROA (Raman optical activity) which is complementary to VCD spectroscopy in the study of optical active molecules. We have introduced an ROA spectrometer in 2003, which is the first commercially available apparatus in Japan. On this occasion, we review the general principle of Raman spectroscopy and its extension to ROA spectroscopy. We show some preliminary results of ROA measurement and compare the ROA spectra to the corresponding VCD spectra, and investigate the characteristic features of ROA spectra and applicability to optical active molecules, especially biological samples. This paper aims to be a basis for our future research of making a new model in interpreting VCD and ROA spectra, and for much complicated molecular systems. | |||||
書誌情報 |
放送大学研究年報 en : Journal of the University of the Air 巻 21, p. 201-236, 発行日 2004-03-31 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0911-4505 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN10019636 |