Related Experiment Video
Updated: Jul 9, 2026

Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy
Published on: June 27, 2014
[Study on the THz spectra of tyrosine]
Shi-Hua Ma1, Yu-Lei Shi, Wei Yan
1Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China.
Abstract:
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.
Related Concept Videos
NMR Spectroscopy of Aromatic Compounds
Spectroscopy of Carboxylic Acid Derivatives
In the...
Mass Spectrometry: Aromatic Compound Fragmentation
UV–Vis Spectroscopy: Molecular Electronic Transitions
2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)
Molecular Spectroscopy: Absorption and Emission

