Evidence for triplet-state-dominated luminescence in biicosahedral superatomic molecular Au25 clusters
In photoluminescence (PL) quenching and triplet fusion upconversion experiments with fluorescent organic-molecule quenchers, it was revealed that a rod-shaped, phosphine- and thiolate-protected biicosahedral Au25 cluster (a representative di-superatomic molecule) exhibits only phosphorescence, not f...
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| Veröffentlicht in: | Nanoscale 2022-01, Vol.14 (22), p.7974-7979 |
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| container_title | Nanoscale |
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| creator | Mitsui, Masaaki Wada, Yuki Kishii, Ryoto Arima, Daichi Niihori, Yoshiki |
| description | In photoluminescence (PL) quenching and triplet fusion upconversion experiments with fluorescent organic-molecule quenchers, it was revealed that a rod-shaped, phosphine- and thiolate-protected biicosahedral Au25 cluster (a representative di-superatomic molecule) exhibits only phosphorescence, not fluorescence, at room temperature with an intersystem crossing quantum yield of almost 100%. By virtue of these photophysical properties, this cluster can be used as a triplet sensitizer that undergoes direct singlet–triplet transitions in the near-infrared (NIR) region (730–900 nm), inducing photon upconversion from NIR to visible light. |
| doi_str_mv | 10.1039/d2nr00813k |
| format | Article |
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| ispartof | Nanoscale, 2022-01, Vol.14 (22), p.7974-7979 |
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| language | eng ; jpn |
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| source | Royal Society Of Chemistry Journals 2008- |
| subjects | Clusters Fluorescence Near infrared radiation Phosphines Phosphorescence Photoluminescence Room temperature Upconversion |
| title | Evidence for triplet-state-dominated luminescence in biicosahedral superatomic molecular Au25 clusters |
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