Generally, amines form protonated cations ([M + H]⁺) in positive polarity during electrospray ionization (ESI). However, it was found that large conjugated amines (LCAs) had binary ionization choices of generating either radical cations (M^•+) or [M + H]⁺ during ESI. Investigation on the mechanism would further our understanding of ESI.

中文翻译：

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电喷雾电离过程中大分子共轭胺二元电离选择的研究

通常，胺在电喷雾电离 (ESI) 过程中会形成正极性的质子化阳离子 ([M + H] ⁺ )。然而，发现大的共轭胺 (LCA) 在 ESI 期间具有生成自由基阳离子 (M ^•+ ) 或 [M + H] ⁺的二元电离选择。对该机制的研究将进一步加深我们对 ESI 的理解。