Terahertz absorption spectra of L-, D-, and DL-alanine and their application to determination of enantiometric composition
Terahertz absorption spectra of L-, D-, and DL-alanine and their application to determination of enantiometric composition
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DOI：
10.1063/1.1857080
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发表时间：
2005-01-31
影响因子：
4
通讯作者：
Hangyo, M
中科院分区：
文献类型：
--
作者：
Yamaguchi, M;Miyamaru, F;Hangyo, M
用太赫兹时域光谱法（THz-TDS）在10 ~ 90 cm（-1）温度范围内测量了L-、D-和DL-丙氨酸多晶的吸收光谱. at.room我们观察到几个吸收带，其中对映体（L-和D-丙氨酸）和外消旋化合物（DL-丙氨酸）之间的峰频率有很大的差异。这种明显的差异表明，太赫兹吸收带是惊人的敏感的晶体结构。该结果表明THz-TDS可用于区分对映体和外消旋化合物。我们提出并证明了一种方法来确定对映体组成的氨基酸从太赫兹吸收光谱。(C)2005年美国物理学会。
Absorption spectra of polycrystalline L-, D-, and DL-alanine have been measured by the terahertz time domain spectroscopy (THz-TDS) in the frequency range from 10 to 90 cm(-1) at.room temperature. We observed several absorption bands, which have the large difference between enantiomers (L- and D-alanine) and the racemic compound (DL-alanine) in their peak frequencies. This obvious difference shows that the THz absorption bands are strikingly sensitive to the crystal structures. This result indicates that the THz-TDS can be used for distinguishing between the enantiomers and the racemic compound. We propose and demonstrate a method to determine the enantiometric composition of amino acids from the THz absorption spectra. (C) 2005 American Institute of Physics.