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- W2021563920 abstract "Multi-stage mass spectrometry (MSn) on [(M + Ag − H)x + Ag]+ precursor ions (where M = an amino acid such as glycine or N,N-dimethylglycine) results in the formation of stable silver (Ag3+, Ag5+ and Ag7+) and silver hydride (Ag2H+, Ag4H+ and Ag6H+) cluster cations in the gas phase. Deuterium labelling studies reveal that the source of the hydride can be either from the α carbon or from one of the heteroatoms. When M = glycine, the silver cyanide clusters Ag4CN+ and Ag5(H,C,N)+ are also observed. Collision induced dissociation (CID) and DFT calculations were carried out on each of these clusters to shed some light on their possible structures. CID of the Agn+ and Agn−1H+ clusters generally results in the formation of the same Agn−2+ product ions via the loss of Ag2 and AgH respectively. DFT calculations also reveal that the Agn+ and Agn−1H+ clusters have similar structural features and that the Agn−1H+ clusters are only slightly less stable than their all silver counterparts. In addition, Agn+ and Agn−1H+ clusters react with 2-propanol and 2-butylamine via similar pathways, with multiple ligand addition occurring and a coupled deamination-dehydration reaction occurring upon condensation of a third (for Ag2H+) or a fourth (for all other silver clusters) 2-butylamine molecule onto the clusters. Taken together, these results suggest that the Agn+ and Agn−1H+ clusters are structurally related via the replacement of a silver atom with a hydrogen atom. This replacement does not dramatically alter the cluster stability or its unimolecular or bimolecular chemistry with the 2-propanol and 2-butylamine reagents." @default.
- W2021563920 created "2016-06-24" @default.
- W2021563920 creator A5005418504 @default.
- W2021563920 creator A5012535766 @default.
- W2021563920 date "2005-01-01" @default.
- W2021563920 modified "2023-10-10" @default.
- W2021563920 title "Gas phase synthesis and reactivity of Agn+ and Agn–1H+ cluster cations" @default.
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- W2021563920 doi "https://doi.org/10.1039/b505645b" @default.
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