Premium
Giant Emission Enhancement of Solid‐State Gold Nanoclusters by Surface Engineering
Author(s) -
Yao Chuanhao,
Xu CongQiao,
Park InHyeok,
Zhao Meng,
Zhu Ziyu,
Li Jing,
Hai Xiao,
Fang Hanyan,
Zhang Yong,
Macam Gennevieve,
Teng Jinghua,
Li Lin,
Xu QingHua,
Chuang FengChuan,
Lu Junpeng,
Su Chenliang,
Li Jun,
Lu Jiong
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202001034
Subject(s) - nanoclusters , bimetallic strip , photoluminescence , cluster (spacecraft) , crystallography , materials science , icosahedral symmetry , quasicrystal , crystal structure , doping , metal , nanotechnology , chemistry , optoelectronics , computer science , metallurgy , programming language
Ligand‐induced surface restructuring with heteroatomic doping is used to precisely modify the surface of a prototypical [Au 25 (SR 1 ) 18 ] − cluster ( 1 ) while maintaining its icosahedral Au 13 core for the synthesis of a new bimetallic [Au 19 Cd 3 (SR 2 ) 18 ] − cluster ( 2 ). Single‐crystal X‐ray diffraction studies reveal that six bidentate Au 2 (SR 1 ) 3 motifs (L2) attached to the Au 13 core of 1 were replaced by three quadridentate Au 2 Cd(SR 2 ) 6 motifs (L4) to create a bimetallic cluster 2 . Experimental and theoretical results demonstrate a stronger electronic interaction between the surface motifs (Au 2 Cd(SR 2 ) 6 ) and the Au 13 core, attributed to a more compact cluster structure and a larger energy gap of 2 compared to that of 1 . These factors dramatically enhance the photoluminescence quantum efficiency and lifetime of crystal of the cluster 2 . This work provides a new route for the design of a wide range of bimetallic/alloy metal nanoclusters with superior optoelectronic properties and functionality.