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Four-Shell Polyoxometalates Featuring High-Nuclearity Ln26 Clusters: Structural Transformations of Nanoclusters into Frameworks Triggered by Transition-Metal Ions.
- Source :
- Angewandte Chemie; 3/1/2017, Vol. 129 Issue 10, p2708-2713, 6p
- Publication Year :
- 2017
-
Abstract
- A series of polyoxometalates (POMs) that incorporate the highest-nuclearity Ln clusters that have been observed in such structures to date (Ln<subscript>26</subscript> , Ln=La and Ce) are described, which exhibit giant multishell configurations (Ln⊂W<subscript>6</subscript>⊂Ln<subscript>26</subscript>⊂W<subscript>100</subscript>). Their structures are remarkably different from known giant POMs that feature multiple Ln ions. In particular, the incorporated Ln-O clusters with a nuclearity of 26 are significantly larger than known high-nuclearity (≤10) Ln-O clusters in POM chemistry. Furthermore, they also contain the largest number of La and Ce centers for any POM reported to date and represent a new kind of rare giant POMs with more than 100 W atoms. Interestingly, the La<subscript>26</subscript>-containing POM can undergo a single-crystal to single-crystal structural transformation in the presence of various transition-metal ions, such as Cu<superscript>2+</superscript>, Co<superscript>2+</superscript>, and Ni<superscript>2+</superscript>, from an inorganic molecular nanocluster into an inorganic-organic hybrid extended framework that is built from POM building blocks with even higher-nuclearity La<subscript>28</subscript> clusters bridged by transition-metal complexes. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00448249
- Volume :
- 129
- Issue :
- 10
- Database :
- Complementary Index
- Journal :
- Angewandte Chemie
- Publication Type :
- Academic Journal
- Accession number :
- 121349578
- Full Text :
- https://doi.org/10.1002/ange.201612046