甘氨酸等氨基酸的中远红外光谱积分摩尔吸光系数
Integrated molar absorptivity of mid- and far-infrared spectra of glycine and other selected amino acids
摘要：
在中红外线和远红外线上研究了五种蛋白质氨基酸，即甘氨酸、异亮氨酸、苯丙氨酸、酪氨酸和色氨酸，目的是促进在空间环境中寻找和鉴定这些天体生物学和天体化学相关分子。测定了所有中红外和远红外波段的摩尔消光系数（ε）以及积分摩尔吸光系数（ε）。还在从-180 ° C到环境温度到+200 ° C的三个不同温度下记录了五种选定氨基酸的中红外光谱。我们测量由温度引起的红外波段的波长偏移，并且对于最相关或温度敏感的红外波段，确定了一系列将波长位置与温度相关联的线性方程。一旦在天体物理物体中检测到这些分子，这些方程就可以提供对这些分子温度的估计，利用所报告的ε和ε的值，将有可能估计这些分子在空间环境中的相对丰度。
英文摘要：
A selection of five proteinogenic amino acids, namely glycine, isoleucine, phenylalanine, tyrosine and tryptophan were studied in the mid-infrared and in the far-infrared with the purpose to facilitate the search and identification of these astrobiological and astrochemical relevant molecules in space environments. The molar extinction coefficients (ε) of all mid- and far-infrared bands were determined as well as the integrated molar absorptivities (ψ). The mid-infrared spectra of the five selected amino acids were recorded also at three different temperatures from -180°C to ambient temperature to +200°C. We measure the wavelength shift of the infrared bands caused by temperature and, for the most relevant or temperature-sensitive infrared bands, a series of linear equations were determined relating wavelength position with temperature. Such equations may provide estimates of the temperature of these molecules once detected in astrophysical objects and with the reported values of ε and ψ, it will be possible to estimate the relative abundance of these molecules in space environments.
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