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离子的碰撞诱导解离CID(Collision induced dissociation)是指具有高平动能的反应物离子与中性体(称为靶气)碰撞,离子的部分平动能转化为激发态能量而导致离子的分解。目前CID方法已发展为解释气相离子结构的重要工具。一个基本的假定是CID谱图只取决于离子的结构,而与离子的初始能量无关。但是近年来Beynon和Bowers分别报道了一些情况,CID谱图随内能显著变化。本文应用CID方法,证实了气相C_2H_6~(2+)双电荷离子稳定存在,同时发现了CID谱图与中性靶气品种有关。
Collision induced dissociation (CID) refers to collisions of reactant ions with high translational kinetic energy with neutrals (called target gases), and partial translational energy of ions is converted to excited state energy to cause ion decomposition. At present, the CID method has been developed as an important tool for explaining the structure of gas-phase ions. A basic assumption is that the CID spectrum depends only on the structure of the ion, regardless of the initial energy of the ion. However, in recent years, Beynon and Bowers reported some cases respectively, and the CID spectrum changed significantly with the internal energy. In this paper, the CID method was used to confirm the existence of double-charged C_2H_6 ~ (2+) ions in the gas phase. At the same time, it was found that the CID spectra were related to the neutral target gas species.