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    Title: Ethylenediamine as a liquid chemical reagent to probe hydrogen bonding and host-guest interactions with crown ethers in an ion trap tandem mass spectrometer
    Authors: 吳慧芬;Wu, Hui-fen;Lin, Pei-yi
    Contributors: 淡江大學化學學系
    Date: 2004-06-30
    Issue Date: 2009-12-01
    Publisher: John Wiley & Sons
    Abstract: Ethylenediamine (EDA) was used as a novel liquid chemical reagent to probe hydrogen bonding and host-guest interactions with crown ether derivatives in an ion trap mass spectrometer (ITMS). Selective ion/molecule reaction product ions were generated by reactions of EDA with oxygenated and aza-crown ethers. For the oxygenated crown ethers, glycols and dimethylglycols, ion/molecule reactions led to the formation of the protonated molecules ([M+H]+) and adduct ions including [M+30]+, [M+44]+ and [M+61]+. The aza-crown ethers produced [M+H]+, [M+13]+ and [M+27]+ ions. Collisionally activated dissociation (CAD) experiments were applied to probe the binding strength of these ion/molecule reaction products. CAD results indicated that all these hydrogen-bonding complexes are weakly bound except for the [M+44]+ ion of 18-crown-6, since all the complexes dissociate to the protonated polyether and/or protonated EDA. Fragmentation of the [M+H]+ ions under CAD conditions indicates the extensive covalent bond cleavage of the protonated crown ether skeleton. Copyright © 2004 John Wiley & Sons, Ltd.
    Relation: Rapid Communications in Mass Spectrometry 18(12), pp.1365-1373
    DOI: 10.1002/rcm.1487
    Appears in Collections:[化學學系暨研究所] 期刊論文

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