Near-unity NIR phosphorescent quantum yield from a room-temperature solvated metal nanocluster
Metal nanoclusters have emerged as promising near-infrared (NIR)-emissive materials, but their room-temperature photoluminescence quantum yield (PLQY), especially in solution, is often low (<10%). We studied the photophysics of Au22(tBuPhC≡C)18 (Au22) and its alloy counterpart Au16Cu6(tBuPhC≡C)18 (Au16Cu6) (where tBu is tert-butyl and Ph is phenyl) and found that copper (Cu) doping suppressed the nonradiative decay (~60-fold less) and promoted intersystem crossing rate (~300-fold higher). The Au16Cu6 nanocluster exhibited >99% PLQY in deaerated solution at room temperature with an emission maximum at 720 nanometers tailing to 950 nanometers and 61% PLQY in the oxygen-saturated solution. The approach to achieve near-unity PLQY could enable the development of highly emissive metal cluster materials.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:383 |
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| Enthalten in: |
Science (New York, N.Y.) - 383(2024), 6680 vom: 19. Jan., Seite 326-330 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Shi, Wan-Qi [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Revised 18.01.2024 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1126/science.adk6628 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM36727468X |
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| 520 | |a Metal nanoclusters have emerged as promising near-infrared (NIR)-emissive materials, but their room-temperature photoluminescence quantum yield (PLQY), especially in solution, is often low (<10%). We studied the photophysics of Au22(tBuPhC≡C)18 (Au22) and its alloy counterpart Au16Cu6(tBuPhC≡C)18 (Au16Cu6) (where tBu is tert-butyl and Ph is phenyl) and found that copper (Cu) doping suppressed the nonradiative decay (~60-fold less) and promoted intersystem crossing rate (~300-fold higher). The Au16Cu6 nanocluster exhibited >99% PLQY in deaerated solution at room temperature with an emission maximum at 720 nanometers tailing to 950 nanometers and 61% PLQY in the oxygen-saturated solution. The approach to achieve near-unity PLQY could enable the development of highly emissive metal cluster materials | ||
| 650 | 4 | |a Journal Article | |
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| 700 | 1 | |a He, Rui-Lin |e verfasserin |4 aut | |
| 700 | 1 | |a Han, Xu-Shuang |e verfasserin |4 aut | |
| 700 | 1 | |a Guan, Zong-Jie |e verfasserin |4 aut | |
| 700 | 1 | |a Zhou, Meng |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Quan-Ming |e verfasserin |4 aut | |
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