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- W2059385680 abstract "Gas-phase fragmentation patterns of poly(propylene imine) dendrimers DAB-dendr-(NH2)n with n = 4, 8, 16, 32, and 64 are described as a result of MSn electrospray ionization mass spectrometry (ESI-MS) studies. The generally accepted on-the-average globular shape of dendrimers is supported here by the linear relationship found between the extent of protonation and molecular mass (M2/3). Unique fragmentation patterns are observed due to this globular shape. Most fragment ions are readily accounted for when, in addition to nucleophilic displacement reactions, proton shifts and rearrangements are taken into consideration. There is a striking difference in fragmentation behavior between singly charged dendrimers and multiply charged dendrimers. Therefore, it is proposed that the site of protonation within the dendritic framework has a large impact on the fragments observed. The position of the proton is largely dependent on both the relative proton affinities and the Coulomb repulsion between neighboring proton..." @default.
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- W2059385680 date "1999-10-22" @default.
- W2059385680 modified "2023-10-10" @default.
- W2059385680 title "Electrospray Mass Spectrometry Studies of Poly(Propylene Imine) Dendrimers: Probing Reactivity in the Gas Phase" @default.
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- W2059385680 doi "https://doi.org/10.1021/ja984432+" @default.
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