Quantitative Surface Chirality Detection with Sum Frequency Generation Vibrational Spectroscopy: Twin Polarization Angle Approach

Quantitative Surface Chirality Detection with Sum Frequency Generation Vibrational Spectroscopy: Twin Polarization Angle Approach
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使用和频生成振动光谱法定量表面手性检测:双偏振角方法

DOI:
10.1088/1674-0068/22/06/592-600
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发表时间:
2009-12
影响因子:
1
通讯作者:
--
中科院分区:
化学4区
文献类型:
--
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本文提出了一种新的基于双偏振角(TPA)的表面和频振动光谱(SFG-VS)手性定量检测方法。通常,非手性贡献主导表面SFG-VS信号,并且纯手性信号通常小两个或三个数量级。因此,难以对表面SFG-VS信号的手性贡献进行定量检测和分析。在TPA方法中,通过改变入射可见光的偏振角以及入射红外光束在固定s或p偏振下的和频信号,偏振相关的SFG信号不仅可以给出总SFG-VS信号中手征贡献的直接签名,而且可以精确测量表面SFG信号中的手征和非手性分量。介绍了TPA方法的一般描述,并给出了实验测试的TPA方法从S-和R-柠檬烯手性液体表面的SFG-VS。由此获得的S-和R-柠檬烯液体表面2878 cm 1光谱峰的最准确度手性过量值分别为(23.7 0.4)%和(25.4 1.3)%。
Here we report a novel twin polarization angle (TPA) approach in the quantitative chirality detection with the surface sum-frequency generation vibrational spectroscopy (SFG-VS). Generally, the achiral contribution dominates the surface SFG-VS signal, and the pure chiral signal is usually two or three orders of magnitude smaller. Therefore, it has been difficult to make quantitative detection and analysis of the chiral contributions to the surface SFG-VS signal. In the TPA method, by varying together the polarization angles of the incoming visible light and the sum frequency signal at fixed s or p polarization of the incoming infrared beam, the polarization dependent SFG signal can give not only direct signature of the chiral contribution in the total SFG-VS signal, but also the accurate measurement of the chiral and achiral components in the surface SFG signal. The general description of the TPA method is presented and the experiment test of the TPA approach is also presented for the SFG-VS from the S- and R-limonene chiral liquid surfaces. The most accurate degree of chiral excess values thus obtained for the 2878 cm1 spectral peak of the S- and R-limonene liquid surfaces are (23.7 0.4)% and (25.4 1.3)%, respectively.
DOI: 10.1063/1.470714
发表时间: 1995-11
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T. Verbiest;M. Kauranen;J. J. Maki-J.;M. Teerenstra;A. Schouten;R. Nolte;A. Persoons
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发表时间: 1971
期刊: Journal of The Chemical Society A: Inorganic, Physical, Theoretical
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发表时间: 2003-11
影响因子: 31
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