通过表面化学工程实现高效白光发射的金纳米团簇

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Abstract：Photoluminescence（PL）isoneof the most important properties of metal nanoclusters（NCs）.Achievingefficientwhite lightemission inmetalNCswithaprecise structures isimportantforpracticalapplicationsbutremainsagreat challenge.Here，we report the efficient white emission from Au10 NCsby elaborately deploying the surface chemistry engineringstrategy.Specificaly，the bis-aldehyde ligandsof4-hydroxyisophthalaldehyde（HOA）are decoratedon the surface of Au10（SG）10 NCs（glutathione denoted as SG）through the cross-linking reaction of imine bonds（ - CHN - ）.The combination of 477 nm blue emission from HOA ligands and 620 nm orange-yellow emission from Au10（SG）10 NCs generates white-light emission in HOA Au10（SG）10 NCsin the solvent mixture of ethanol and water. More importantly，dynamic color tuningfrombluelighttoyellowlightisachievedbycontrollingthevolumefractionofethanolinthesolventmixture.Inaddition，the as-formed imine bonds significantly improve the structural rigidity ofHOA- Au10（SG）10 NCs，resulting in the 51.2% absolute photoluminescence quantum yield（PLQY）of white emission.The present study exemplifies the paradigm to control theemisioncolorand improve the PLQYof metal NCs through rational surface chemistry engineering.

KeyWords：metal nanoclusters;white-light emission;electron transfer CLC number：O482.31 Document code：A DOI：10.37188/CJL.20250073 CSTR：32170.14.CJL.20250073

摘要：光致发光（PL）是金属纳米团簇（NCs）最重要的性质之一。（剩余26087字）