Issue 34, 2011

Electron transfer-induced fragmentation of thymine and uracil in atom–molecule collisions

Abstract

Ion-pair formation has been studied in hyperthermal (30–100 eV) neutral potassium collisions with gas phase thymine (C5H6N2O2) and uracil (C4H4N2O2). Negative ions formed by electron transfer from the alkali atom to the target molecule were analysed by time-of-flight (TOF) mass spectrometry. The most abundant product anions are assigned to CNO and (U–H)/(T–H) and the associated electron transfer mechanisms are discussed. Special emphasis is given to the enhancement of ring breaking pathways in the present experiments, notably CNO formation, compared with free electron attachment measurements.

Graphical abstract: Electron transfer-induced fragmentation of thymine and uracil in atom–molecule collisions

Article information

Article type
Paper
Submitted
27 Apr 2011
Accepted
08 Jul 2011
First published
27 Jul 2011

Phys. Chem. Chem. Phys., 2011,13, 15657-15665

Electron transfer-induced fragmentation of thymine and uracil in atom–molecule collisions

D. Almeida, R. Antunes, G. Martins, S. Eden, F. Ferreira da Silva, Y. Nunes, G. Garcia and P. Limão-Vieira, Phys. Chem. Chem. Phys., 2011, 13, 15657 DOI: 10.1039/C1CP21340G

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