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A Short-Wavelength Raman Optical Activity Spectrometer with Laser Source at 457nm for the Characterization of Chiral Molecules
Zhang, Ying1; Wang, Peng1,2; Jia, Guoqing1; Cheng, Feng1; Feng, Zhaochi1; Li, Can1
关键词Raman Optical Activity Roa Short-wavelength Laser 457nm Roa Enhanced Roa Signal-to-noise Ratio
刊名APPLIED SPECTROSCOPY
2017-09-01
DOI10.1177/0003702817712260
71期:9页:2211-2217
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Technology
类目[WOS]Instruments & Instrumentation ; Spectroscopy
研究领域[WOS]Instruments & Instrumentation ; Spectroscopy
关键词[WOS]ACTIVITY SPECTROSCOPY ; SCATTERING
英文摘要Developing a high-sensitivity Raman optical activity (ROA) spectrometer has been regarded as one of the great challenges in chiral science and technology. Herein, we report our recent progress on the development of a short-wavelength ROA (sw-ROA) spectrometer with the excitation line at 457nm, which shows obviously improved signal-to-noise (S/N) ratio compared with the currently available 532nm ROA spectrometer. This could be ascribed to the fifth-power of frequency dependence for ROA intensity together with the potential advantage of avoiding fluorescence for most molecules. The required laser power at the sample for being able to obtain a reliable ROA spectrum is less than 150 milliwatts (mW) for most samples. In the case of neat S--pinene sample, the ROA signal can be acquired with the laser power at sample as low as 5 mW with the total exposure time of 5min. The concentration of S--pinene sample can be reduced to 10% (v/v) by diluting with ethanol. These results demonstrate the great potential of sw-ROA (457nm) working with decreased laser power, shortened acquisition time, and lower sample concentration. The applicability of sw-ROA (457nm) has also been demonstrated by measuring representative chiral samples, including carbohydrates, amino acids, protein in aqueous solution, and chiral organic molecule in organic solvents.
语种英语
WOS记录号WOS:000408851300016
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/149861
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
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GB/T 7714
Zhang, Ying,Wang, Peng,Jia, Guoqing,et al. A Short-Wavelength Raman Optical Activity Spectrometer with Laser Source at 457nm for the Characterization of Chiral Molecules[J]. APPLIED SPECTROSCOPY,2017,71(9):2211-2217.
APA Zhang, Ying,Wang, Peng,Jia, Guoqing,Cheng, Feng,Feng, Zhaochi,&Li, Can.(2017).A Short-Wavelength Raman Optical Activity Spectrometer with Laser Source at 457nm for the Characterization of Chiral Molecules.APPLIED SPECTROSCOPY,71(9),2211-2217.
MLA Zhang, Ying,et al."A Short-Wavelength Raman Optical Activity Spectrometer with Laser Source at 457nm for the Characterization of Chiral Molecules".APPLIED SPECTROSCOPY 71.9(2017):2211-2217.
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