The interaction of cytosine with AuCl4−, under electrospray ionization mass spectrometric conditions, is discussed. On the basis of respective full scan mass spectra and product ion spectra, obtained in positive and negative ion mode, it has been deduced that cytosine is very prone to form Au(I)-containing complexes. The complexes may be formed in the gas phase by decomposition of Au(III)-containing complexes and also in the electrospray ionization source as a result of the occurrence of redox process. It has also been found that the interaction of cytosine with Au+ is stronger than that with Cu+ or Ag+, although taking into account the electrostatic attraction, it is not expected.

中文翻译：

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电喷雾电离质谱条件下意外的胞嘧啶-AuCl4-相互作用——胞嘧啶-Au(I) 复合物的形成

讨论了在电喷雾电离质谱条件下胞嘧啶与 AuCl4- 的相互作用。根据分别在正离子和负离子模式下获得的全扫描质谱和产物离子谱，推断胞嘧啶很容易形成含 Au(I) 的配合物。配合物可以在气相中通过含金 (III) 配合物的分解形成，也可以在电喷雾电离源中由于氧化还原过程的发生而形成。还发现胞嘧啶与 Au+ 的相互作用强于与 Cu+ 或 Ag+ 的相互作用，尽管考虑到静电引力，这并不符合预期。