Abstract:Following a selected ion flow tube mass spectrometry(SIFT-MS), analysis of the headspace of a commercial available nail polish remover pad in which γ-butyrolactone (GBL) and 2-butoxy-1-ethanol were found to be the major volatiles, a study of the reactions of H3O+,NO+ and O+·2 ions with nine alkoxy alcohols (R1—O—R2OH) was carried out using selected ion flow tube(SIFT) at a carrier gas (helium) pressure of 9.3×101 Pa. Experiments were also performed at various carrier gas pressures (4×101-1.1×102 Pa) for some reactions and under moist air condition. The number and distribution of the hydrates for the product ions were used to identify their structures and to investigate reaction mechanisms. The H3O+ reactions proceed via nascent ion-molecule complex (H3O+.M)*,then produce R1—O—R2OH.H+,(R1—O—R2)+,HOR2OH.H+ and R2O.H+ ions through various channels. Similarly, via a nascent complex (NO+.M)*, NO+.M,(M—H)+ and (M—ROH)+ ions were produced in the NO+ reactions. The collisions between the nascent complexes (H3O+.M)* and (NO+.M)* with a third body (He, N2 and O2 etc) have influence on the product ion distributions. The O+·2 reactions produce mainly dissociative product ions and it is uncertain whether they proceed via the nascent ion-molecule complex (O+·2.M)*. This study provides rate coefficients and product ions in the SIFT-MS database for the analysis of these compounds in normal and humid air samples. It will be further utilised into addiction and drug abuse, respiratory medicine and other research areas using SIFT-MS.
王天舒. H3O+,NO+和O+·2离子同九种烷氧基醇化合物反应的研究 [J]. 光谱学与光谱分析, 2006, 26(04): 747-752.
Tianshu WANG. A Study of the Reactions of H3O+,NO+ and O+·2 Ions with Nine Alkoxy Alcohols. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(04): 747-752.
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