教師資料查詢 | 類別: 期刊論文 | 教師: 吳慧芬 HUI-FEN WU (瀏覽個人網頁)

標題:Effects of reaction ion kinetic energy on both endothermic and exothermic ion/molecule reactions in a quadrupole ion trap mass spectrometer
學年81
學期2
出版(發表)日期1993/04/01
作品名稱Effects of reaction ion kinetic energy on both endothermic and exothermic ion/molecule reactions in a quadrupole ion trap mass spectrometer
作品名稱(其他語言)
著者Wu, H. F. ; 吳慧芬; Brodbelt, J. S.
單位淡江大學化學學系
出版者
著錄名稱、卷期、頁數International journal of mass spectrometry and ion processes124, pp.175-184
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.
關鍵字Endothermic ion/molecule reactions;Quadrupole ion trap;Kinetic energy
語言英文
ISSN
期刊性質國內
收錄於
產學合作
通訊作者
審稿制度
國別中華民國
公開徵稿
出版型式,電子版
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