Selected ion flow tube (SIFT) studies of the reactions of H3O+, NO+ and O-2(+center dot) with six volatile phytogenic esters

0359546 - ÚFCH JH 2012 RIV NL eng J - Journal Article
Sovová, K. - Dryahina, Kseniya - Španěl, Patrik
Selected ion flow tube (SIFT) studies of the reactions of H3O+, NO+ and O-2(+center dot) with six volatile phytogenic esters.
International Journal of Mass Spectrometry. Roč. 300, č. 1 (2011), s. 31-38. ISSN 1387-3806. E-ISSN 1873-2798
R&D Projects: GA ČR GA202/09/0800; GA ČR GA203/09/0256
Institutional research plan: CEZ:AV0Z40400503
Keywords : SIFT-MS * ion-molecule reactions * plant esters
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 2.549, year: 2011

The selected ion flow tube (SIFT) was used to study the reactions of the three SIFT-MS precursor ions H3O+, NO+ and O-2(+center dot) with six phytogenic esters: hexyl acetate, phenethyl acetate, benzyl acetate, methyl salicylate, methyl benzoate and benzyl benzoate. These compounds are emitted into the atmosphere by various species of plants and play a role in communication between individual plants and also amongst different species. Thus, it is necessary to know the rate constants and branching ratios of the different ion products of these reactions for identification and quantification by SIFT-MS. The results of this study show that the reactions of H3O+ with the esters proceed via proton transfer, which is non-dissociative for methyl salicylate, entirely dissociative for benzyl benzoate and partly dissociative for the remaining four esters. All protonated esters readily associate with water molecules with the notable exception of methyl salicylate.
Permanent Link: http://hdl.handle.net/11104/0197318