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- W2807983397 abstract "We report on the radiative and nonradiative deactivation pathways of selected charge states of the stoichiometric hexagold phosphine-stabilized ionic clusters, [(C)(AuDppy)6Ag2·(BF4)x](4–x)+ with x = 2 and 3 (Dppy = diphenylphosphino-2-pyridine), combining gas-phase photoluminescence and photodissociation with quantum chemical computations. These clusters possess an identical isostructural core made of a hyper-coordinated carbon at their center octahedrally surrounded by six gold ions, and two silver ions at their apexes. Their luminescence and fragmentation behavior upon photoexcitation was investigated under mass and charge control in an ion trap. The experimental and computational results shed light on the electronic states involved in the optical transitions as well as on their core, ligand, or charge transfer character. Gas-phase results are discussed in relation with condensed phase measurements, as well as previous observations in solution and on metal–organic frameworks. The monocationic species (x = 3) is found to be less stable than the dicationic one (x = 2). In the luminescence spectrum of the monocationic species, a shoulder at short wavelength can be observed and is assigned to fragment emission. This fragment formation appears to be favored for the monocation by the existence of a low lying singlet state energetically overlapping with the triplet state manifold, which is populated quickly after photoexcitation." @default.
- W2807983397 created "2018-06-21" @default.
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- W2807983397 date "2018-06-14" @default.
- W2807983397 modified "2023-09-27" @default.
- W2807983397 title "Gas-Phase Photoluminescence and Photodissociation of Silver-Capped Hexagold Clusters" @default.
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- W2807983397 doi "https://doi.org/10.1021/acs.jpca.8b01864" @default.
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