The one-electron reduction of a multi-centred iron(III) polyoxometallate. A pulse radiolysis study

Popivker, Inna; Zilbermann, Israel; Maimon, Eric; Cohen, Haim; Meyerstein, Dan

doi:10.1016/j.inoche.2011.05.029

Cited by 2 publications

(1 citation statement)

References 17 publications

(23 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additional intensity is seen above 1.5 eV, which likely contains contributions from Fe 2+ → W 6+ charge-transfer absorption, analogous to that described above for Mn 2+ -bridged frameworks. Some of this absorption may also be due to Fe 2+ → Fe 3+ intervalence charge-transfer (IVCT), mediated by delocalized cluster orbitals. Similar features have been observed in Prussian blue coordination networks or in mixed-valent Fe MOFs .…”

Section: Results and Analysismentioning

confidence: 99%

Tunable Metal Oxide Frameworks via Coordination Assembly of Preyssler-Type Molecular Clusters

et al. 2019

View full text Add to dashboard Cite

We present the synthesis of metal oxide frameworks composed of [NaP5W30O110]14– assembled with Mn, Fe, Co, Ni, Cu, or Zn bridging metal ions. X-ray diffraction shows that the frameworks adopt the same assembly regardless of bridging metal ion. Furthermore, our synthesis allows for the assembly of isostructural frameworks with mixed-metal ion bridges, or with clusters that have been doped with Mo, providing a high degree of compositional diversity. This consistent assembly enables investigation into the role of the building blocks in the properties of the metal oxide frameworks. The presence of bridging metal ions leads to increased conductivity compared to unbridged frameworks, and frameworks bridged with Fe have the highest conductivity. Additionally, Mo-doping can be used to enhance the conductivities of the frameworks. Similar structures can be obtained from clusters in which the central Na+ has been replaced with Bi3+ or Sm3+. Overall, the optical and electronic properties are tunable via choice of bridging metal ion and cluster building block and reveal emergent properties in these cluster-based frameworks. These results demonstrate the promise of using polyoxometalate clusters as building blocks for tunable complex metal oxide materials with emergent properties.

show abstract

Section: Results and Analysismentioning

confidence: 99%

Tunable Metal Oxide Frameworks via Coordination Assembly of Preyssler-Type Molecular Clusters

et al. 2019

View full text Add to dashboard Cite

show abstract

Two wheel-like polytungstates obtained by incorporation of two {Cu4} clusters and two molybdenum centers in the {W48} wheel

Liu

Zhang

et al. 2012

Dalton Trans.

View full text Add to dashboard Cite

Two new {P(8)W(48)} wheel-based compounds, Na(12)Li(16){[Cu(H(2)O)](2)[Cu(4)(OH)(4)(H(2)O)(8)](2)P(8)W(48)O(184)}·55H(2)O (1), and K(4)Na(24)Li(10){(MoO(2))(2)(P(8)W(48)O(184))}·61H(2)O (2) have been synthesized by a conventional aqueous solution method, and characterized by UV, IR, TG analysis, XPRD, (31)P NMR, XPS, single-crystal X-ray diffraction analyses, magnetic study and electrochemistry study. In compound 1, a wheel-type {P(8)W(48)} containing two {Cu(4)} clusters and two isolated Cu cations results in a 10-Cu-containing polyoxotungstate, which represents the first {P(8)W(48)}-based compound trapping two transition metal (TM) clusters in its inner cavity. Further, the polyoxoanion was connected by Na(+) and Li(+) cations into a 3D framework. Compound 2 is a 2-Mo-containing {P(8)W(48)}-based polyoxotungstate. Magnetic study indicates that antiferromagnetic interactions exist in compound 1.

show abstract

The one-electron reduction of a multi-centred iron(III) polyoxometallate. A pulse radiolysis study

Cited by 2 publications

References 17 publications

Tunable Metal Oxide Frameworks via Coordination Assembly of Preyssler-Type Molecular Clusters

Tunable Metal Oxide Frameworks via Coordination Assembly of Preyssler-Type Molecular Clusters

Two wheel-like polytungstates obtained by incorporation of two {Cu4} clusters and two molybdenum centers in the {W48} wheel

Contact Info

Product

Resources

About