Polyoxometalate composite

Bromba-g L, Diao Y, Wu H, Speakman SA, Hatton TA. Chromium(III) terephthalate metal organic framework (MIL-101) HF-free synthesis, structure, polyoxometalate composites, and catalytic properties. Chem Mater 2012 24 1664-75. 

Polyoxometalate Chemistry for Nano-Composite Design Edited by Toshihiro Yamase and Michael T. Pope... 

The interest in the redox, catalytic, and electrocatalytic properties of unsubstituted and substituted polyoxometalates arouses much attention [2-15] because they are a versatile family of molecular metal-oxide clusters with applications in catalysis as well as in medicine and material science. Such versatility must be traced to at least two main characteristics. First, the size and mass of these unique molecular oxides place their solution chemistry in an intermediate position between small molecule solution chemistry and infinite lattice solid-state chemistry. Second, their redox behaviors may be very flexible and finely tuned on purpose, by changing smoothly their composition, with a... 

Yamase, T. and Pope, M.T. (eds) (2002) Polyoxometalate Chemistry for Nano-Composite Design, Kluwer Academic/ Plenum Publishers, New York. 

Polyoxometalates (POMs), also known as heteropolyacids (HPA),3 are a class of compounds formed from negatively charged inorganic metal-oxygen building blocks. When charge-balanced with cationic species, POMs self-assemble into unusual 3D structures with specific topological and electronic properties.214 POMs are commonly formed from polyanions of early transition metals such as W, Mo or V. These anions can be substituted with other transition metals. The diversities in POMs composition and structure make them attractive for many applications, particularly as Bronsted acid and redox catalysts. For example,... 

Zirconium forms heteropolyacids with molybdenum, such as Hg [Zr(M02O7)6], whose alkali metal derivatives have been isolated. In the first member of the series, of composition ZrM02O7(OH)2(H2O)2, the zirconium atom has a pentagonal bipyramidal arrangement see Polyoxometalates). 

Figure 5.3 The structure of [La(al-P2Wn06i)2] [13]. (Reprinted with permission from L. Fiesel-mann, et al., Influence of steric and electronic properties of the defect site, lanthanide ionic radii, and solution conditions on the composition of lanthanide(III) al-P2Wi70gj polyoxometalates, Inorganic Chemistry, 44, no. 10, 3569-3578 (Figure 2), 2005. 2005 American Chemical Society.)...

Recent years have seen the reports of increasing numbers of very large polyoxometalate anions. These may be divided into two classes (i) composite anions constructed of assemblies of simpler, usually lacunary, polyanions and (ii) mixed-valence polymolybdate anions which comprise common building blocks, e.g., Mo8, Mo6, and Mo2 clusters that have no separate, stable existence. 

Clemente-Juan, J. M. Clemente-Leon, M. Coronado, E. Foment, A. Gaita, A. Gomez-Garcia, C. J. Martinez-Ferrero, E. In Polyoxometalate Chemistry for Nano-composite Design Yamase, T., Pope, M. T., Eds. Kluwer Academic/Plenum New York, 2002 pp 157-168. 

Yamase, T. Pope, M. T., Eds. Polyoxometalate Chemistry for Nano-composite Design 2002. 

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