Collision-induced dissociation of protonated cyproheptadine: Ion-neutral complex mediated electron transfer versus hydride transfer reaction

文献类型： 外文期刊

第一作者： Shen, Shanshan

作者： Shen, Shanshan;Yuan, Jun;Wu, Jun;Pan, Yuanjiang;Chai, Yunfeng

作者机构：

关键词： Cyproheptadine; Electrospray ionization mass spectrometry; Hydride transfer; Electron transfer; Ion/neutral complex

期刊名称：INTERNATIONAL JOURNAL OF MASS SPECTROMETRY （ 影响因子：1.986； 五年影响因子：1.799 ）

ISSN： 1387-3806

年卷期： 2018 年 430 卷

页码：

收录情况： SCI

摘要： In this study, the gas-phase fragmentation of protonated cyproheptadine was investigated by electrospray ionization tandem mass spectrometry (ESI-MSn). Upon collision induced dissociation (CID), two most abundant fragment ions at m/z 196 and 197 were observed, assigned to the loss of toluene or benzyl radical respectively. The formation pathways of these two ions involved the cleavages of multi-bonds along with complicated skeletal rearrangement. In order to rationale the fragmentation, we proposed a mechanism involving an ion-neutral complex (INC) intermediate. Intra-complex hydride transfer or electron transfer lead to the formation of final product ions. Deuterium-labeled experiments, density functional theory (DFT) calculations and the breakdown curves also corroborate the proposed mechanism. (C) 2018 Elsevier B.V. All rights reserved.

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