New fragmentation pathways in K-THF collisions as studied by electron-transfer experiments: negative ion formation

Authors

Diego T. Almeida, Universidade Nova De Lisboa
F. Ferreira Da Silva, Universidade Nova De Lisboa
S Eden, Open University, Walton Hall
Gustavo García, University of Wollongong
Paulo Limao-Vieira, The Open University, Universidade Nova De Lisboa

RIS ID

88007

Publication Details

Almeida, D., Da Silva, F. Ferreira., Eden, S., Garcia , G. & Limao-Vieira, P. (2014). New fragmentation pathways in K-THF collisions as studied by electron-transfer experiments: negative ion formation. The Journal of Physical Chemistry A: Isolated Molecules, Clusters, Radicals, and Ions; Environmental Chemistry, Geochemistry, and Astrochemistry; Theory, 118 (4), 690-696.

Abstract

Time-of-flight (TOF) negative ion mass spectra have been obtained in collisions of 20-100 eV neutral potassium atoms with tetrahydrofuran (C 4H8O), an analogue for the sugar unit in DNA/RNA. Major enhancements in O- and C2H3O- production were observed compared with earlier dissociative electron attachment (DEA) experiments. In further contrast with DEA, no evidence was observed for dehydrogenated parent anions, and three new fragment anions were detected: CH-, C2 -, and C2H-. These contrasting results for potassium impact and DEA highlight significant differences in the reaction pathways initiated by the two electron delivery processes.