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Aggregation‐Induced Emission (AIE) in Ag−Au Bimetallic Nanocluster
Author(s) -
Jin Shan,
Liu Wei,
Hu Daqiao,
Zou Xuejuan,
Kang Xi,
Du Wenjun,
Chen Shuang,
Wei Shiqiang,
Wang Shuxin,
Zhu Manzhou
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201800189
Subject(s) - nanoclusters , intramolecular force , luminescence , bimetallic strip , crystal structure , aggregation induced emission , extended x ray absorption fine structure , crystallography , photochemistry , fluorescence , absorption (acoustics) , chemistry , materials science , metal , absorption spectroscopy , nanotechnology , stereochemistry , optics , organic chemistry , physics , optoelectronics , composite material
Herein we report the synthesis and structure determination of a non‐fluorescent Au 4 Ag 5 (dppm) 2 (SAdm) 6 (BPh 4 ) (dppm=bis(diphenylphosphino)methane and HSAdm=1‐adamantane mercaptan) nanocluster in methanol with extremely strong AIE when aggregating to the solid state (i.e., film or crystal). This phenomenon was rarely reported in structural determined noble metal nanoclusters. The extended X‐ray absorption fine structure (EXAFS) measurement ruled out the hypothesis that the luminescence originated from the structure change in different states. Besides, the crystal structure (determined by X‐ray diffraction) revealed that the tightly combined left‐ and right‐handed enantiomers induced the strong restriction of intramolecular motions (RIM), which may have an impact on aggregation‐induced emission.