Negative ion chemistry of Deoxyribose and THF upon potassium atom collisions

10 pags., 3 figs., 2 tabs. -- XXVIII International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2013)Negative ion formation in collisions of potassium atoms with tetrahydrofuran (THF) and D-Ribose (DR) were performed in a crossed molecular beam setup equipped with a time- of-flight (TOF) mass spectrometer. Owing to the role of these molecules as possible representations of the sugar unit in the DNA/RNA, the fragmentation patterns obtained for different collision energies were compared and the role of K+ post-collision interaction with the molecular is evaluated.D.A. and F.F S. acknowledge the Portuguese Foundation for Science and Technology (FCT-MEC) for a post-graduate SFRH/BD/61645/2009 and post-doctoral SFRH/BPD/68979/2010 grants. We are also grateful to the partial funding from the Portuguese research Grants PEst-OE/FIS/UI0068/2011 and PTDC/FIS-ATO/1832/2012 through FCT-MEC. PL-V acknowledges his visiting Professor position from The Open University, UK. The Spanish Ministerio de Economía y Competitividad (Project No. FIS 2009-10245) is also acknowledged. Some of this work forms part of the EU/ESF COST Actions Nano-IBCT-MP1002 and The Chemical Cosmos-CM0805.Peer reviewe