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 Au 22 ( t BuPhC≡C) 18 (Au 22 ) and its alloy counterpart Au 16 Cu 6 (...
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| Published in | Science (American Association for the Advancement of Science) Vol. 383; no. 6680; pp. 326 - 330 |
|---|---|
| Main Authors | , , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
United States
The American Association for the Advancement of Science
19.01.2024
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| Subjects | |
| Online Access | Get full text |
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| Abstract | 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 Au
22
(
t
BuPhC≡C)
18
(Au
22
) and its alloy counterpart Au
16
Cu
6
(
t
BuPhC≡C)
18
(Au
16
Cu
6
) (where
t
Bu 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 Au
16
Cu
6
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.
Gold nanoclusters have potential applications as near-infrared emissive materials for biological applications but often exhibit low photoluminescence quantum yield (PLQY) in solution at room temperature. Shi
et al
. found that copper substitution to form an Au16Cu6 cluster improved the PLQY to more than 60% in oxygenated solutions at room temperature. The presence of copper led to ultrafast intersystem crossing to the long-lived triplet state and also suppressed nonradiative decay. —Phil Szuromi
A copper-doped gold cluster exhibited ultrafast intersystem crossing and suppressed nonradiative decay after photoexcitation. |
|---|---|
| AbstractList | 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.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. Editor’s summaryGold nanoclusters have potential applications as near-infrared emissive materials for biological applications but often exhibit low photoluminescence quantum yield (PLQY) in solution at room temperature. Shi et al. found that copper substitution to form an Au16Cu6 cluster improved the PLQY to more than 60% in oxygenated solutions at room temperature. The presence of copper led to ultrafast intersystem crossing to the long-lived triplet state and also suppressed nonradiative decay. —Phil Szuromi 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 Au 22 ( t BuPhC≡C) 18 (Au 22 ) and its alloy counterpart Au 16 Cu 6 ( t BuPhC≡C) 18 (Au 16 Cu 6 ) (where t Bu 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 Au 16 Cu 6 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. Gold nanoclusters have potential applications as near-infrared emissive materials for biological applications but often exhibit low photoluminescence quantum yield (PLQY) in solution at room temperature. Shi et al . found that copper substitution to form an Au16Cu6 cluster improved the PLQY to more than 60% in oxygenated solutions at room temperature. The presence of copper led to ultrafast intersystem crossing to the long-lived triplet state and also suppressed nonradiative decay. —Phil Szuromi A copper-doped gold cluster exhibited ultrafast intersystem crossing and suppressed nonradiative decay after photoexcitation. 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 Au ( BuPhC≡C) (Au ) and its alloy counterpart Au Cu ( BuPhC≡C) (Au Cu ) (where Bu is -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 Au Cu 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. |
| Author | Han, Xu-Shuang Zeng, Linlin Wang, Quan-Ming Guan, Zong-Jie Shi, Wan-Qi He, Rui-Lin Zhou, Meng |
| Author_xml | – sequence: 1 givenname: Wan-Qi orcidid: 0009-0001-4369-6824 surname: Shi fullname: Shi, Wan-Qi organization: Department of Chemistry, Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education), Tsinghua University, Beijing 100084, P. R. China – sequence: 2 givenname: Linlin orcidid: 0009-0000-8837-6739 surname: Zeng fullname: Zeng, Linlin organization: Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China – sequence: 3 givenname: Rui-Lin surname: He fullname: He, Rui-Lin organization: Department of Chemistry, Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education), Tsinghua University, Beijing 100084, P. R. China – sequence: 4 givenname: Xu-Shuang orcidid: 0000-0001-9627-8960 surname: Han fullname: Han, Xu-Shuang organization: Department of Chemistry, Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education), Tsinghua University, Beijing 100084, P. R. China – sequence: 5 givenname: Zong-Jie orcidid: 0000-0001-8977-0850 surname: Guan fullname: Guan, Zong-Jie organization: Department of Chemistry, Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education), Tsinghua University, Beijing 100084, P. R. China., Department of Chemistry, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China – sequence: 6 givenname: Meng orcidid: 0000-0001-5187-9084 surname: Zhou fullname: Zhou, Meng organization: Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China – sequence: 7 givenname: Quan-Ming orcidid: 0000-0002-3764-6409 surname: Wang fullname: Wang, Quan-Ming organization: Department of Chemistry, Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education), Tsinghua University, Beijing 100084, P. R. China |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/38236955$$D View this record in MEDLINE/PubMed |
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| Snippet | Metal nanoclusters have emerged as promising near-infrared (NIR)–emissive materials, but their room-temperature photoluminescence quantum yield (PLQY),... Metal nanoclusters have emerged as promising near-infrared (NIR)-emissive materials, but their room-temperature photoluminescence quantum yield (PLQY),... Editor’s summaryGold nanoclusters have potential applications as near-infrared emissive materials for biological applications but often exhibit low... |
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| SubjectTerms | Atomic energy levels Climate Copper Nanoclusters Phosphorescence Photoluminescence Photons Room temperature Triplet state |
| Title | Near-unity NIR phosphorescent quantum yield from a room-temperature solvated metal nanocluster |
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