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As the novel magic number clusters of nucleobases, the thymine quintets induced by ammonium ion (NH4+), and particularly by its derivatives such as protonated alkyl amines and protonated aryl amines, have been studied by electrospray ionization mass spectrometry (ESI‐MS) and density functional theory (DFT) calculations. The DFT‐optimized geometry of NH4+ induced thymine quintet ([T5 + NH4]+) reveals...
We previously reported that thymine molecules can specifically form a pentameric magic number cluster named as thymine quintet in the presence of K+, Rb+ and Cs+. Actually, thymine decamer and doubly charged thymine 15‐mer metaclusters can be observed along with thymine quintet in the ESI mass spectra of thymine with the addition of K+, Rb+ and Cs+. The product ion spectra of these metaclusters, especially...
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