期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 56, 期 48, 页码 15397-15401出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201709827
关键词
chirality; circularly polarized luminescence; gold; nanocluster; self-assembly
资金
- National Key Basic Research Program of China [2014CB931801, 2016YFA0200700]
- National Natural Science Foundation of China [21475029, 91427302]
- Chinese Academy of Sciences [QYZDJ-SSW-SLH038, YZ201311, XDA09040100]
- CAS-CSIRO [GJHZ1503]
- K.C.Wong Education Foundation
Self-assembly of inorganic nanoparticles into ordered structures is of interest in both science and technology because it is expected to generate new properties through collective behavior; however, such nanoparticle assemblies with characteristics distinct from those of individual building blocks are rare. Herein we use atomically precise Au clusters to make ordered assemblies with emerging optical activity. Chiral Au clusters with strong circular dichroism (CD) but free of circularly polarized luminescence (CPL) are synthesized and organized into uniform body-centered cubic (BCC) packing nanocubes. Once the ordered structure is formed, the CD intensity is significantly enhanced and a remarkable CPL response appears. Both experiment and theory calculation disclose that the CPL originates from restricted intramolecular rotation and the ordered stacking of the chiral stabilizers, which are fastened in the crystalline lattices.
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