Effects of reactant ion kinetic energy on both endothermic and exothermic ion/molecule reactions in a quadrupole ion trap mass spectrometer

淡江大學機構典藏 > 理學院 > 化學學系暨研究所 > 會議論文 > Item 987654321/25734

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题名:	Effects of reactant ion kinetic energy on both endothermic and exothermic ion/molecule reactions in a quadrupole ion trap mass spectrometer
作者:	吳慧芬;Wu, Hui-Fen;Brodbelt, Jennifer S.
贡献者:	淡江大學化學學系
关键词:	Endothermic ion/molecule reactions;Quadrupole ion trap;Kinetic energy
日期:	1993-05
上传时间:	2009-12-01 09:13:40 (UTC+8)
摘要:	The effects of kinetic energy on the outcomes of exothermic and endothermic ion/molecule reactions in a quadrupole ion trap mass spectrometer are examined. Endothermic proton-transfer and charge exchange reactions may be driven in a quadrupole ion trap by acceleration of selected reactant ions to higher kinetic energies, via resonant power absorption from a supplementary a.c. voltage, prior to collisions with neutral substrate molecules. Reactions as endothermic as 1.1 eV for either proton-transfer or charge exchange processes have been promoted, with maximum conversion efficiencies of reactant ions to product ions ranging from 5 to 15% under optimized conditions. Depending on the nature of the reactant ion and its possible reaction pathways, activation of a selected ion may lead to a combination of collisionally-activated dissociation, ion loss from the trap by impingement upon an electrode or ejection, and endothermic ion/molecule reaction. Activation of reactant ions prior to exothermic ion/molecule reactions in the quadrupole ion trap results in decreased reaction efficiency, a result expected for translationally hot ions.
關聯:	Proceedings of the 41th ASMS Conference on Mass Spectrometry and Allied Topics, pp.192a-192b
显示于类别:	[化學學系暨研究所] 會議論文

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