Journal
JOURNAL OF PHYSICAL CHEMISTRY A
Volume 124, Issue 28, Pages 5840-5848Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpca.0c03131
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Atomically precise Au-25(MBA)(18) nanoclusters were investigated by mass spectrometry and ion mobility spectrometry. We show that clusters sharing the same chemical composition and bearing the same net charge may display different structures and different charge repartition patterns, namely, the number of charges corresponding to deprotonation of the ligand moieties through carboxyl groups is not the same for all detected species. Part of the observed heterogeneity is a consequence of spontaneous electron loss occurring in the gas phase, which modifies the net charge of the clusters while maintaining the initial (de)protonation state.
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