On the effect of ultraviolet irradiation of alanine, glycine and tryptophan crystals on raman spectra of these materials

TL;DR

This study investigates how ultraviolet irradiation at 275 nm alters the Raman spectra of amino acid microcrystals, revealing shifts and intensity changes likely caused by molecular reorientation due to radiation.

Contribution

It provides new insights into the spectral changes and molecular behavior of amino acids under UV radiation, which was not extensively studied before.

Findings

Spectral lines shift towards higher energies after irradiation

Relative intensities of Raman components change post-irradiation

Molecular reorientation is suggested as the cause of spectral changes

Abstract

The effect of ultraviolet radiation (275 nm) on the Raman spectra of amino acid microcrystals: alanine, glycine, tryptophan was studied. The position of some lines in the spectra after irradiation has slightly shifted towards high energies. The main effect: observation of changes in the relative intensities of the components of the Raman spectra after irradiation of microcrystals. It has been suggested that this change is due to the reorientation of some molecules under the influence of radiation