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- W2521164208 abstract "Temperature-dependent and ultrafast transient absorption measurements were carried out to probe the optical properties and exciton relaxation dynamics in metal-doped (Pt and Hg) Au25 clusters. Optical absorption and electrochemistry results have shown that the Pt-doped cluster has a distinctly different HOMO–LUMO gap than that of Au25, while the gap did not change much for Hg-doped Au25. A decrease in temperature had resulted in much sharper absorption features as well as an increased number of absorption peaks, enhanced oscillator strength, and a shift in the energy maximum to higher energies for all metal-doped Au25 clusters. Interestingly, the peaks observed for Pt and Hg-doped clusters are very different from that of undoped Au25 cluster, suggesting that the altered structures play a crucial role on their optical properties. From the analysis of absorption peak shifts, higher phonon energies of 67 ± 8 meV were determined for Pt- and Hg-doped Au25 clusters when compared to 43 ± 6 meV for undoped Au25. ..." @default.
- W2521164208 created "2016-09-30" @default.
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- W2521164208 date "2016-10-03" @default.
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- W2521164208 title "Temperature-Dependent Absorption and Ultrafast Exciton Relaxation Dynamics in MAu<sub>24</sub>(SR)<sub>18</sub> Clusters (M = Pt, Hg): Role of the Central Metal Atom" @default.
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- W2521164208 doi "https://doi.org/10.1021/acs.jpcc.6b09386" @default.
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