Here we report on the gas-phase interactions between protonated enantiopure amino acids (l- and d-enantiomers of Met, Phe, and Trp) and chiral target gases [(R)- and (S)-2-butanol, and (S)-1-phenylethanol] in 0.1–10.0 eV low-energy collisions. Two major processes are seen to occur over this collision energy regime, collision-induced dissociation and ion-molecule complex formation. Both processes were found to be independent of the stereo-chemical composition of the interacting ions and targets. These data shed light on the currently debated mechanisms of gas-phase chiral selectivity by demonstrating the inapplicability of the three-point model to these interactions, at least under single collision conditions.

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在这里我们报告质子化对映体纯氨基酸（Met，Phe和Trp的l和d对映体）与手性目标气体[（R）-和（S）-2-丁醇和（S）-1-苯基乙醇]在0.1–10.0 eV的低能碰撞中。在该碰撞能量范围内，发生了两个主要过程，即碰撞诱导的离解和离子分子复合物的形成。发现这两个过程均与相互作用的离子和靶标的立体化学组成无关。这些数据通过证明三点模型至少在单个碰撞条件下对这些相互作用的不适用性，阐明了目前正在争论的气相手性选择性机理。

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