Abstract

In this paper, the temperature characteristics of aliphatic $L$-asparagine and aromatic $L$-tyrosine amino acids at low temperature were measured by terahertz time domain spectroscopy. The low frequency (0.1–2 THz) absorption peaks of these two amino acids at room temperature were verified by Fourier transform infrared spectroscopy and Raman spectra. The results show that the terahertz spectra of aliphatic and aromatic amino acids have different responses to temperature. With the decrease in temperature, the absorption peaks of the two amino acids shifted blue, and new absorption peaks appeared in some amino acids. However, the change in absorption peak width is slightly different. In this paper, the vibrational modes of $L$-asparagine and $L$-tyrosine are calculated by density functional theory. It is concluded that the vibrational modes of $L$-asparagine and $L$-tyrosine are formed by intermolecular forces.

© 2021 Optical Society of America

PDF Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription