On the redox property of Ag16Au13 clusters: One-way conversion from anionic [Au13Ag16L24]3− to charge neutral [Au13Ag16L24]

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Abstract
The redox property of metal nanoclusters plays a pivotal role and is of particular interest in catalysis and other applications, such as aerobic oxidation, hydrogenation, and singlet oxygen generation, over intact nanoclusters. In this study, we report a one-way conversion process of the anionic [Ag16Au13L24]3− nanocluster into a charge neutral nanocluster of [Ag16Au13L24]0 via oxidation in a solution phase using H2O2 as the oxidant. Three-electron loss of [Ag16Au13L24]3− occurred during the oxidation process, which was confirmed by electron paramagnetic resonance and electrospray ionization mass spectrometry methods. The one-way conversion from [Ag16Au13L24]3− to [Ag16Au13L24]0 nanoclusters is in situ monitored by UV–visible spectroscopy. A nanocluster charge effect is manifested in the UV–visible spectra of nanoclusters; an ∼10 nm redshift is observed compared with the optical absorption spectrum of [Ag16Au13L24]3−.
Funding Information
  • Liaoning Natural Science Foundation of China (2020-MS-024)
  • Liaoning Revitalization Talents Program (XLYC1807151)

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