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Ultrastable atomically precise chiral silver clusters with more than 95% quantum efficiency

Monolayer-protected atomically precise silver clusters display low photoluminescence (PL) quantum yield (QY) and susceptibility under ambient conditions, and their chiroptical activities also remain underdeveloped. Here, we report enantiomers of an octahedral Ag(6) cluster prepared via one-step synt...

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Autores principales: Han, Zhen, Dong, Xi-Yan, Luo, Peng, Li, Si, Wang, Zhao-Yang, Zang, Shuang-Quan, Mak, Thomas C. W.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7007243/
https://www.ncbi.nlm.nih.gov/pubmed/32083176
http://dx.doi.org/10.1126/sciadv.aay0107
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author Han, Zhen
Dong, Xi-Yan
Luo, Peng
Li, Si
Wang, Zhao-Yang
Zang, Shuang-Quan
Mak, Thomas C. W.
author_facet Han, Zhen
Dong, Xi-Yan
Luo, Peng
Li, Si
Wang, Zhao-Yang
Zang, Shuang-Quan
Mak, Thomas C. W.
author_sort Han, Zhen
collection PubMed
description Monolayer-protected atomically precise silver clusters display low photoluminescence (PL) quantum yield (QY) and susceptibility under ambient conditions, and their chiroptical activities also remain underdeveloped. Here, we report enantiomers of an octahedral Ag(6) cluster prepared via one-step synthesis using designed chiral ligands at ambient temperature. These clusters exhibit a highest PLQY (300 K) >95.0% and retain their structural integrity and emission up to 150°C in air. Atomically precise structural determination combined with photophysical and computational analysis revealed that thermally activated delayed fluorescence, observed in silver cluster systems, is responsible for the high PLQY, which combines chirality in excited states to generate strong circularly polarized luminescence. These unprecedented findings open up horizons of investigation of monolayer-protected silver clusters for future luminescence applications.
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spelling pubmed-70072432020-02-20 Ultrastable atomically precise chiral silver clusters with more than 95% quantum efficiency Han, Zhen Dong, Xi-Yan Luo, Peng Li, Si Wang, Zhao-Yang Zang, Shuang-Quan Mak, Thomas C. W. Sci Adv Research Articles Monolayer-protected atomically precise silver clusters display low photoluminescence (PL) quantum yield (QY) and susceptibility under ambient conditions, and their chiroptical activities also remain underdeveloped. Here, we report enantiomers of an octahedral Ag(6) cluster prepared via one-step synthesis using designed chiral ligands at ambient temperature. These clusters exhibit a highest PLQY (300 K) >95.0% and retain their structural integrity and emission up to 150°C in air. Atomically precise structural determination combined with photophysical and computational analysis revealed that thermally activated delayed fluorescence, observed in silver cluster systems, is responsible for the high PLQY, which combines chirality in excited states to generate strong circularly polarized luminescence. These unprecedented findings open up horizons of investigation of monolayer-protected silver clusters for future luminescence applications. American Association for the Advancement of Science 2020-02-07 /pmc/articles/PMC7007243/ /pubmed/32083176 http://dx.doi.org/10.1126/sciadv.aay0107 Text en Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Research Articles
Han, Zhen
Dong, Xi-Yan
Luo, Peng
Li, Si
Wang, Zhao-Yang
Zang, Shuang-Quan
Mak, Thomas C. W.
Ultrastable atomically precise chiral silver clusters with more than 95% quantum efficiency
title Ultrastable atomically precise chiral silver clusters with more than 95% quantum efficiency
title_full Ultrastable atomically precise chiral silver clusters with more than 95% quantum efficiency
title_fullStr Ultrastable atomically precise chiral silver clusters with more than 95% quantum efficiency
title_full_unstemmed Ultrastable atomically precise chiral silver clusters with more than 95% quantum efficiency
title_short Ultrastable atomically precise chiral silver clusters with more than 95% quantum efficiency
title_sort ultrastable atomically precise chiral silver clusters with more than 95% quantum efficiency
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7007243/
https://www.ncbi.nlm.nih.gov/pubmed/32083176
http://dx.doi.org/10.1126/sciadv.aay0107
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