酪氨酸的太赫兹频谱研究

利用太赫兹时域光谱技术探测了室温条件下的酪氨酸样品的频谱响应, 获得了酪氨酸的太赫兹频谱。实验结果表明，酪氨酸在太赫兹波段存在特征频谱响应,可以用来探测分子的结构和振动情况。在获得的太赫兹频谱中，首次观察到0.23和2.46 THz附近存在的吸收峰。用HF方法和DFT计算了酪氨酸单分子和酪氨酸二聚体的太赫兹频谱，对理论计算和实验测量的偏离进行了详细的分析。在0.23 THz处的吸收峰，初步标定为氢键连接的2个酪氨酸分子的面外摇摆振动。

Study on the THz Spectra of Tyrosine

Terahertz time-domain spectroscopy(TDS) has been used to study the spectral properties of tyrosine at room temperature.The terahertz spectra of sample were observed.The result shows that the sample has the spectral response in terahertz spectral range,a fact demonstrating that the terahertz spectra of tyrosine could be used to study the molecular structure and vibration of sample.Two absorption peaks were found at 0.23 and 2.46 THz respectively for the first time.The corresponding theoretical spectra were given by using HF and DFT methods for both tyrosine monomer and dimmer.The difference between the theoretical and experimental results was analyzed in detail.The origin of the observed absorption at 0.23 THz was assigned to the wagging of the two tyrosine molecules linked by hydrogen bond.