Electron driven processes in sulphur containing compounds CH3SCH3 and CH3SSCH3

Janina Kopyra; Jakub Władziński

doi:10.1140/epjd/e2015-60184-6

EPJ

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2020 Impact factor 1.425

Atomic, Molecular, Optical and Plasma Physics

Topical Issue: COST Action Nano-IBCT: Nano-scale Processes Behind Ion-Beam Cancer Therapy

Open Access

Eur. Phys. J. D (2015) 69: 157
https://doi.org/10.1140/epjd/e2015-60184-6

Regular Article

Electron driven processes in sulphur containing compounds CH₃SCH₃ and CH₃SSCH₃^*

Janina Kopyra^a and Jakub Władziński

Siedlce University, Faculty of Science, 3 Maja 54, 08-110 Siedlce, Poland

^a e-mail: kopyra@uph.edu.pl

Received: 18 March 2015
Received in final form: 13 May 2015
Published online: 16 June 2015

Abstract

Dissociative electron attachment to gas phase dimethyl sulphide (CH₃SCH₃) and dimethyl disulphide (CH₃SSCH₃) has been studied by means of a crossed beams apparatus. Cleavage of the C–S bond within CH₃SCH₃ and the S–S bond within CH₃SSCH₃ is observed within a resonance in the energy range below 2 eV and visible preferentially via the appearance of the fragment CH₂S⁻. The striking finding is that the intensity of CH₂S⁻ generated from CH₃SSCH₃ is more than two orders of magnitude higher than the intensity of the respective anionic fragment generated from CH₃SCH₃. Our results clearly demonstrate that the CH₃SSCH₃ molecule, which contains disulphide bridge is substantially more sensitive towards electron attachment resulting mainly in dissociation along the S–S bridge.

Contribution to the Topical Issue “COST Action Nano-IBCT: Nano-scale Processes Behind Ion-Beam Cancer Therapy”, edited by Andrey Solov’yov, Nigel Mason, Gustavo García, Eugene Surdutovich.

© The Author(s) 2015. This article is published with open access at Springerlink.com

Open Access This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.