Unusual fcc-structured Ag10 kernels trapped in Ag70 nanoclusters

Controlled trapping atom-precise ultrasmall silver nanoparticles into silver nanoclusters is challenging; thus only limited progress has been made in this area. We are therefore inspired to isolate two novel silver nanoclusters, Ag10@Ag70 (SD/Ag80a and SD/Ag80b; SD = SunDi), where a novel fcc-struct...

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Bibliographic Details
Published in:Chemical science (Cambridge) 2019, Vol.10 (2), p.564-568
Main Authors: Yan-Min, Su, Wang, Zhi, Gui-Lin, Zhuang, Quan-Qin, Zhao, Xing-Po, Wang, Chen-Ho, Tung, Sun, Di
Format: Article
Language:English
Subjects:
Chemistry
Crystal structure
Crystallography
Data acquisition
Embryos
Nanoclusters
Nanoparticles
NMR
Nuclear magnetic resonance
Polyoxometallates
Self-assembly
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Summary:Controlled trapping atom-precise ultrasmall silver nanoparticles into silver nanoclusters is challenging; thus only limited progress has been made in this area. We are therefore inspired to isolate two novel silver nanoclusters, Ag10@Ag70 (SD/Ag80a and SD/Ag80b; SD = SunDi), where a novel fcc-structured Ag10 kernel built from two single-edge opened Ag6 octahedra by sharing one edge is trapped. The bioctahedral Ag10 kernel is locked by a pair of Mo7O2610− anions to form an inner Ag10@(Mo7O26)2 core which is further encapsulated by an outer Ag70 shell to form three-shell Ag10@(Mo7O26)2@Ag70 nanoclusters. Notably, the bioctahedral Ag10 kernel has not been observed in silver nanoclusters ever before, thus representing a new embryo state of silver nanoparticles. SD/Ag80a emits in the near infrared (NIR) region (λem = 730 nm) at low temperature. This work will deepen our understanding on the atomic-level growth of silver nanoparticles and complicated three-shell self-assembly involving polyoxometalate (POM) and two different silver nanoclusters.
ISSN:2041-6520
2041-6539
DOI:10.1039/c8sc03396j