运用太赫兹时域光谱（THz-TDS）技术与理论模拟相结合的方法研究了鹰嘴豆芽素A在太赫兹(THz)波段的光谱特性。在室温真空环境中得到样品在0.5~2.4 THz波段的功率吸收谱，特征吸收峰分别位于0.86，1.15，1.60，1.74，2.12和2.28 THz处。同时借助密度泛函理论（DFT）/6-31G*基组计算了气态鹰嘴豆芽素A的分子结构及其在THz波段的振动频率，并据此对实验光谱吸收峰进行指认。结果表明，理论计算结果与实验数据符合得很好，在0.5~2.4 THz波段内的共振吸收峰主要源于分子的集体振动。该研究有助于进一步理解鹰嘴豆芽素A的生物作用。

Theoretical and experimental vibration spectra of biochanin A in frequency range from 0.5 to 2.4 THz are investigated. Under room temperature and vacuum conditions, the absorption peaks were observed at 0.86, 1.15, 1.60, 1.74, 2.12 and 2.28 THz. In parallel with experimental study, 6-31G* basis set and density functional theory (DFT) are applied to obtain structure and vibrational frequencies of isolated genistein molecule at gas phase. The observed vibrational spectra are assigned according to DFT calculations. Results show that theoretical calculations are in good agreement with experimental data. The observed vibrational peaks in frequency range of 0.5~2.4 THz are mainly induced by collected vibrations of molecule. The research is helpful to understand the role of biochanin A in biological reactions.