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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/25152

    Title: Probing reactive sites for ion-molecule reactions of anthraquinones with dimethyl ether using an external source ion trap tandem mass spectrometer and computational chemistry
    Authors: 吳慧芬;Wu, Hui-fen;Chen, Li-wei;Chen, Chien-hung
    Contributors: 淡江大學化學學系
    Date: 2001-11-15
    Issue Date: 2009-12-01
    Publisher: John Wiley & Sons
    Abstract: Gas-phase ion-molecule reactions of anthraquinone derivatives with dimethyl ether (DME) were investigated using an external source ion trap mass spectrometer. Semi-empirical calculations were executed to determine possible reactive sites for the product ions. Collision activated dissociation (CAD) was successfully performed for very low abundance of ion-molecule products. Even for product ions with a relative intensity below 1%, CAD experiments can be successfully performed. Significantly more structural information could be elucidated based on this special feature. Importantly, the CAD spectra of very minor ions could be measured by this ion trap instrument, which significantly enhances the future role of the ion trap as a powerful analytical instrument. CAD of all product ions on anthraquinone compounds typically eliminates neutral molecules such as CO or H(2)O. A hydration phenomenon in the CAD processes resulting from the precursor ions incorporating one molecule of H(2)O and then eliminating one molecule of CO was observed in this study.
    Relation: Rapid Communications in Mass Spectrometry 15(21), pp.1977-1987
    DOI: 10.1002/rcm.456
    Appears in Collections:[化學學系暨研究所] 期刊論文

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