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    題名: Effects of reaction ion kinetic energy on both endothermic and exothermic ion/molecule reactions in a quadrupole ion trap mass spectrometer
    作者: Wu, H. F.;吳慧芬;Brodbelt, J. S.
    貢獻者: 淡江大學化學學系
    關鍵詞: Endothermic ion/molecule reactions;Quadrupole ion trap;Kinetic energy
    日期: 1993-04-01
    上傳時間: 2011-10-15 23:18:31 (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: International journal of mass spectrometry and ion processes124, pp.175-184
    DOI: 10.1016/0168-1176(93)80089-W
    顯示於類別:[化學學系暨研究所] 期刊論文

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