［C_7H_5O］^（2＋·）双电荷离子的解离反应研究

A Study on the Decompositions of [C_7H_5O]￣(2+·) Doubly Charged Ion in the Gas Phase

本文研究了由苯甲酰氨产生的［Ｃ_７Ｈ_５Ｏ］^（２＋·）双电荷离子的单分子解离反应及碰撞诱导解离（ＣＩＤ）和电子捕获诱导解离（ＥＣＩＤ）反应，讨论了离子的结构及电荷分离过渡态的结构，该离子主要以保持苯环或苯环上Ｈ迁移到侧链的结构存在。用在碰撞室上加电压的方法，排除了ＣＩＤ和ＥＣＩＤ谱中单分子解离产物的干扰。

The unimolecular neutral losses, unimolecular charge separations,collision induced decompositions (CID ) and electron capture induced decompositions(ECID) of [C_7H_5O]￣(2+·) doubly charged ions produced from benzyolamide in the ion source of mass spectrometer under 70 eV electron impact were studied in the present work. The decomposing products show that [C_7H_5O]￣(2+·) mainly exists in two types of structures-intact benzene ring retaining and H migrating structures. The interferences of unimolecular decomposition products in the collision spectra (CID, ECID) were excluded by using the method of application of either a negative or a positive voltage to the collision cell.