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Compression‐Driven Internanocluster Reaction for Synthesis of Unconventional Gold Nanoclusters
Author(s) -
Gan Zibao,
Xia Nan,
Yan Nan,
Zhuang Shengli,
Dong Jingwu,
Zhao Yan,
Jiang Shuqing,
Tao Qiang,
Wu Zhikun
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202014828
Subject(s) - nanoclusters , thermogravimetric analysis , photoluminescence , chemistry , metal , absorption (acoustics) , mass spectrometry , crystal structure , nanoparticle , crystallography , materials science , nanotechnology , organic chemistry , optoelectronics , chromatography , composite material
Can the active kernels in ultrasmall metal nanoparticles (nanoclusters, NCs) react with one another, or can the internanocluster reaction occur when they are in close enough proximity? To resolve this fundamental issue, we investigated the solid‐state internanocluster reaction of the most studied gold NC Au 25 (SR) 18 (SR: thiolate). A novel NC was produced by increasing the pressure to 5 GPa, whose composition was determined to be Au 32 (SC 2 H 4 Ph) 24 by mass spectrometry and thermogravimetric analysis. As revealed by single‐crystal X‐ray crystallography, the structure, a bicuboid Au 14 kernel and three pairs of interlocked trimetric staples, has not been reported and endows the NC with obvious photoluminescence. DFT calculations indicate that the staples contribute substantially to the absorption properties. Further experiments reveal the pressure (internanocluster distance) can tune the internanocluster reaction, and the resulting product is not necessarily the thermodynamic product.