Construction of an Au12Cd2 nanocluster with circularly polarized luminescence by a metal- and ligand-exchange strategy

Excellent luminescence properties and unique chiral structures enable nanoclusters to be a novel class of circularly polarized luminescence (CPL) materials, and their precise structures facilitate the clarification of structure–activity relationships. However, efficiently preparing nanoclusters with...

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Bibliographic Details
Published in:Chemical science (Cambridge) 2024-03, Vol.15 (13), p.4853-4859
Main Authors: Zhou, Jun, Yang, Xiaofei, Zheng, Peisen, Li, Qinzhen, Li, Xiaowu, Chai, Jinsong, Huang, Baoyu, Yang, Sha, Zhu, Manzhou
Format: Article
Language:English
Subjects:
Alloying
Chemistry
Circular polarization
Ligands
Luminescence
Nanoclusters
Optical properties
Photoluminescence
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Summary:Excellent luminescence properties and unique chiral structures enable nanoclusters to be a novel class of circularly polarized luminescence (CPL) materials, and their precise structures facilitate the clarification of structure–activity relationships. However, efficiently preparing nanoclusters with CPL properties is still a great challenge. In this work, the luminescent properties as well as the molecular symmetry were simultaneously manipulated to transform the centrosymmetric Au14Cd1 into a chiral Au12Cd2 nanocluster, which has CPL properties. In detail, Cd doping and chiral-ligand exchange were performed simultaneously on the Au14Cd1 nanocluster to realize its photoluminescence enhancement and chiral-framework construction by increasing the alloying degree which is defined as deep-alloying and chiral ligand induction at the same time, resulting in the formation of an Au12Cd2 nanocluster with CPL properties. Further investigations revealed an increased alloying degree in the structure-maintained M6 kernel of Au12Cd2, which results in a 15-fold enhancement in quantum yield.
ISSN:2041-6520
2041-6539
DOI:10.1039/d3sc06810b