Jump to main content
Jump to site search


[MW12O44] clusters: unprecedented central heteroatoms atomically dispersed in the eight coordination state bridging the 1 : 12 polyoxometalate family of Keggin and Silverton

Author affiliations

Abstract

A general synthetic protocol is developed to afford a series of [MW12O44] (M = Ni2+, Co2+ and Fe3+) clusters with diverse central heteroatoms, by employing [W12O44]16− as the structure-directing precursor. The structures of the [MW12O44] clusters are definitively confirmed by single crystal X-ray diffraction (XRD). The central heteroatoms are monodispersed and capture the “empty” cavity of [W12O44]16− with an 8 coordination number state, as demonstrated by the combination of single crystal structure extended X-ray absorption fine structure (EXAFS) fitting analysis and wavelet transform EXAFS (WTEXAFS). The chemical state of the heteroatoms is confirmed by analyses of high resolution synchrotron radiation photoelectron spectroscopy (HR-SRPES), high resolution X-ray photoelectron spectroscopy (HR-XPS) and EXAFS. The exact components of the [MW12O44] clusters and their thermal stability are also investigated by inductively coupled plasma-mass spectrometry (ICP-MS) and thermal gravimetric analyses (TGA). The powder XRD patterns indicate their phase purity. Moreover, the newly discovered [MW12O44] clusters bridge the Keggin and Silverton polyoxometalate family structures and so unify the 1 : 12 hetero-polyoxometalates.

Graphical abstract: [MW12O44] clusters: unprecedented central heteroatoms atomically dispersed in the eight coordination state bridging the 1 : 12 polyoxometalate family of Keggin and Silverton

Back to tab navigation

Supplementary files

Publication details

The article was received on 12 Jul 2019, accepted on 22 Aug 2019 and first published on 23 Aug 2019


Article type: Paper
DOI: 10.1039/C9NR05913J
Nanoscale, 2019, Advance Article

  •   Request permissions

    [MW12O44] clusters: unprecedented central heteroatoms atomically dispersed in the eight coordination state bridging the 1 : 12 polyoxometalate family of Keggin and Silverton

    Y. Chen, S. Tian, Z. Qin, J. Zhang, Y. Cao, S. Chu, L. Lu and G. Li, Nanoscale, 2019, Advance Article , DOI: 10.1039/C9NR05913J

Search articles by author

Spotlight

Advertisements