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- W2941233919 abstract "We introduce a cluster coprotected by thiol and diphosphine ligands, [Ag22(dppe)4(2,5-DMBT)12Cl4]2+ (dppe = 1,2-bis(diphenylphosphino)ethane; 2,5-DMBT= 2,5-dimethylbenzenethiol), which has an Ag10 core encapsulated by an Ag12(dppe)4(2,5-DMBT)12Cl4 shell. The Ag10 core comprises two Ag5 distorted trigonal bipyramidal units and is uncommon in Au and Ag nanoclusters. The electrospray ionization mass spectrum reveals that the cluster is divalent and contains four free electrons. An uncommon crystallization-induced enhancement of emission is observed in the cluster. The emission is weak in the solution and amorphous states. However, it is enhanced 12 times in the crystalline state compared to the amorphous state. A detailed investigation of the crystal structure suggests that well-arranged C–H···π and π···π interactions between the ligands are the major factors for this enhanced emission. Further, in-depth structural elucidation and density functional theory calculations suggest that the cluster is a superatom with four magic electrons." @default.
- W2941233919 created "2019-05-03" @default.
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- W2941233919 date "2019-04-24" @default.
- W2941233919 modified "2023-10-12" @default.
- W2941233919 title "Confining an Ag<sub>10</sub> Core in an Ag<sub>12</sub> Shell: A Four-Electron Superatom with Enhanced Photoluminescence upon Crystallization" @default.
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- W2941233919 doi "https://doi.org/10.1021/acsnano.9b01189" @default.
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