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Bond dissociation of the dipeptide dialanine and its derivative alanine anhydride induced by low energy electrons

Alizadeh, E., Gschliesser, D., Bartl, P., Hager, M., Edtbauer, A., Vizcaino, V., Mauracher, A., Probst, M., Märk, T.D., Ptasińska, S., and others. (2011) Bond dissociation of the dipeptide dialanine and its derivative alanine anhydride induced by low energy electrons. Journal of Chemical Physics, 134 (5). (doi:10.1063/1.3544217) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
https://doi.org/10.1063/1.3544217

Abstract

Dissociative electron attachment to dialanine and alanine anhydride has been studied in the gas phase utilizing a double focusing two sector field mass spectrometer. We show that low-energy electrons (i.e., electrons with kinetic energies from near zero up to 13 eV) attach to these molecules and subsequently dissociate to form a number of anionic fragments. Anion efficiency curves are recorded for the most abundant anions by measuring the ion yield as a function of the incident electron energy. The present experiments show that as for single amino acids (M), e.g., glycine, alanine, valine, and proline, the dehydrogenated closed shell anion (M-H)̄ is the most dominant reaction product. The interpretation of the experiments is aided by quantum chemical calculations based on density functional theory, by which the electrostatic potential and molecular orbitals are calculated and the initial electron attachment process prior to dissociation is investigated.

Item Type: Article
DOI/Identification number: 10.1063/1.3544217
Uncontrolled keywords: Bond dissociation, Closed-shell anion, Dipeptide, Dissociative electron attachment, Dominant reaction product, Double focusing, Efficiency curves, Electron attachment, Electrostatic potentials, Gasphase, Incident electrons, Ion yields, Low energy electrons, Quantum chemical calculations, Sector field, Amino acids, Chemical bonds, Density functional theory, Electrons, Mass spectrometry, Molecular orbitals, Negative ions, Photodissociation, acid anhydride, alanine, alanylalanine, dipeptide, drug derivative, article, chemical structure, chemistry, electron, Alanine, Anhydrides, Dipeptides, Electrons, Models, Molecular
Divisions: Faculties > Sciences > School of Physical Sciences
Depositing User: Nigel Mason
Date Deposited: 17 Jul 2019 15:08 UTC
Last Modified: 17 Jul 2019 15:08 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/74753 (The current URI for this page, for reference purposes)
Mason, Nigel: https://orcid.org/0000-0002-4468-8324
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