Abstract
Ion-pair formation to gas phase molecules induced by electron transfer has been studied by investigating the products of collisions between fast potassium atoms and target molecules using a crossed molecular-beam technique. The negative ions formed in such collisions are TOF mass analysed. As far as (bio)molecules are concerned, TOF mass spectra at different collision energies reveal interesting anionic patterns with reduced fragmentation at lower impact energies. In the unimolecular decomposition of the temporary negative ion (TNI), complex internal rearrangement may involve the cleavage and formation of new bonds. In this chapter we report some of the recent achievements in negative ion formation of some polyatomic molecules with the special attention to biological relevant targets.
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Acknowledgments
PLV acknowledges the Portuguese Foundation for Science and Technology (FCT-MCTES) for the research grant POCI/FIS/58845/2004 & PPCDT/FIS/58845/2004, and together with GG acknowledges the Spanish-Portuguese Project HP2006-0042; Ministerio de Ciencia e Innovación (project FIS2009-10245), Spain is also acknowledge. FFS acknowledges FCT-MCTES for the SFRH/BPD/68979/2010 financial support. Some of this work forms part of the EU/ESF COST Actions: Electron Controlled Chemical Lithography (ECCL) CM0601, The Chemical Cosmos CM0805 and the Nano-scale Insights in Ion Beam Cancer Therapy (Nano-IBCT) MP1002.
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Limão-Vieira, P., da Silva, F.F., Gómez-Tejedor, G.G. (2012). Electron Transfer-Induced Fragmentation in (Bio)Molecules by Atom-Molecule Collisions. In: García Gómez-Tejedor, G., Fuss, M. (eds) Radiation Damage in Biomolecular Systems. Biological and Medical Physics, Biomedical Engineering. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-2564-5_3
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