This article is cited in 1 paper

IV International Conference with the School of Young Scientists ''Physics - life science''
Radiospectroscopic and mass spectrometric methods in the life sciences

Fragmentation of 2,5-diketopiperazine cyclic dipeptide ions

A. A. Basalaev^a, V. V. Kuz'michev^a, M. N. Panov^a, A. V. Petrov^b, O. V. Smirnov<sup>a

a</sup> Ioffe Institute, St. Petersburg, Russia
^b Institute of Chemistry, St. Petersburg State University, St. Petersburg, Russia

Abstract: The mechanism of radiation damage to 2,5-diketopiperazine (DKP, C$_4$H$_6$N$_2$O$_2$) molecules in the gas phase upon interaction with He$^{2+}$ ions with an energy Ep = 4 keV/u has been investigated. The relative cross sections of various elementary processes occurring in single collisions of DKP with ions have been measured for the first time. The channels of fragmentation processes of singly charged ions have been studied experimentally. The DFT method was used to calculate the geometry of molecules and singly charged DKP ions, as well as the energies of the main experimentally observed channels of fragmentation of these ions.

Keywords: electron capture, dipeptides, molecular ion fragmentation.

Received: 06.12.2021
Revised: 06.12.2021
Accepted: 03.03.2022

DOI: 10.21883/JTF.2022.07.52654.309-21

Bibliographic databases:

•