Pushing
up the Size Limit of Metal Chalcogenide Supertetrahedral
Nanocluster
Posted on 2018-01-16 - 19:35
The cubic ZnS structure
type and the size-dependent properties
of related nanoparticles are of both fundamental and technological
importance. Yet, it remains a challenge to synthesize large atom-precise
clusters of this structure type. Currently, only supertetrahedral
clusters with 4, 10, 20, and 35 metal sites (denoted as T2, T3, T4,
and T5, respectively) are known. Because the synthesis of T5 in 2002,
numerous synthetic efforts targeting larger clusters only resulted
in T2–T5 clusters in various compositions and intercluster
connectivity, with T6 (56 metal and 84 anion sites) being elusive.
Here, we report the so-far largest supertetrahedral cluster (T6, [Zn25In31S84]25–). New
T6 clusters can serve as the host matrix for optically active centers.
Mn-doped variants of T4 and T6 have also been made, allowing the investigation
of site-dependent Mn emission. The results lead to the elucidation
of the mechanism regulating Mn emission via size-dependent crystal
lattice strain and provide new insight into Mn-doping chemistry in
cluster-based chalcogenides at the atomic level.
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Xu, Xiaofan; Wang, Wei; Liu, Dongliang; Hu, Dandan; Wu, Tao; Bu, Xianhui; et al. (2018). Pushing
up the Size Limit of Metal Chalcogenide Supertetrahedral
Nanocluster. ACS Publications. Collection. https://doi.org/10.1021/jacs.7b12092
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AUTHORS (7)
XX
Xiaofan Xu
WW
Wei Wang
DL
Dongliang Liu
DH
Dandan Hu
TW
Tao Wu
XB
Xianhui Bu
PF
Pingyun Feng
KEYWORDS
size-dependent propertiesNew T 6 clusters84 anion sites35 metal sitescluster-based chalcogenidessize-dependent crystal lattice strainZnS structure typeT 6T 5T 4supertetrahedral clusterMetal Chalcogenide Supertetrahedral NanoclusterMn emission31 S 84intercluster connectivityhost matrixZn 25supertetrahedral clustersstructure typeMn-doping chemistrysite-dependent Mn emissionatom-precise clustersMn-doped variants