Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 56, Issue 48, Pages 15397-15401Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201709827
Keywords
chirality; circularly polarized luminescence; gold; nanocluster; self-assembly
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Funding
- 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
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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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