Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA.
J Am Soc Mass Spectrom. 1992 Sep;3(6):680-2. doi: 10.1016/1044-0305(92)85010-H.
Evidence of ion isomerization during isolation in an ion trap mass spectrometer is presented. An ion-molecule reaction that is specific for the tolyl cation was used to monitor the relative abundance of this species. In particular, it has been observed that ion isolation in the ion trap can impart sufficient energy to the tolyl cation to cause it to isomerize to a form (presumably either the benzyl or the tropylium ion) that is not reactive with the neutral reagent. These results are important to consider in ion trap applications involving ion species having activation barriers for isomerization lower than the activation barriers for dissociation.
本文介绍了在离子阱质谱仪中进行离子分离时离子异构化的证据。使用一种特定于甲苯阳离子的离子-分子反应来监测该物种的相对丰度。特别地，已经观察到在离子阱中进行离子分离可以向甲苯阳离子赋予足够的能量，使其异构化为一种形式（推测为苄基或薁离子），该形式与中性试剂不反应。这些结果对于涉及异构化活化势垒低于离解活化势垒的离子物种的离子阱应用非常重要。
