Alkynyl-Stabilized Superatomic Silver Clusters Showing Circularly Polarized Luminescence

We report a new enantiomeric pair of superatomic silver clusters, R/S-Ag 17 , prepared from chiral alkynyl ligands. R-Ag 17 and S-Ag 17 possess C 3 symmetry and emit near-infrared (NIR) light with a quantum yield (QY) of 8.0% under ambient condition as well as NIR circularly polarized luminescence (...

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Published inJournal of the American Chemical Society Vol. 143; no. 16; pp. 6048 - 6053
Main Authors Zhang, Miao-Miao, Dong, Xi-Yan, Wang, Zhao-Yang, Luo, Xi-Ming, Huang, Jia-Hong, Zang, Shuang-Quan, Mak, Thomas C. W
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 28.04.2021
Subjects
ligands
luminescence
optical isomerism
silver
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ISSN0002-7863
1520-5126
1520-5126
DOI10.1021/jacs.1c02098

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Summary:We report a new enantiomeric pair of superatomic silver clusters, R/S-Ag 17 , prepared from chiral alkynyl ligands. R-Ag 17 and S-Ag 17 possess C 3 symmetry and emit near-infrared (NIR) light with a quantum yield (QY) of 8.0% under ambient condition as well as NIR circularly polarized luminescence (CPL) as a result of the chirality of the excited states. Both experiments and theoretical calculations indicate for the first time that the CPL originates from transitions between superatomic 1P z (along the C 3 axis) and 1S orbitals. This work opens a new avenue for CPL-active metal nanoclusters by utilizing chiral alkynyl ligands and enlightens the chirality transfer from chiral protecting ligands to superatomic states in metal clusters.
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ISSN:0002-7863
1520-5126
1520-5126
DOI:10.1021/jacs.1c02098