Book ChapterDOI
Protonation, Oligomerization, and Condensation Reactions of Vanadate(V), Molybdate(vi), and Tungstate(vi)
TLDR
In this article, the authors discuss protonation, oligomerization, and condensation reactions of vanadate(V), molybdate(VI), and tungstate(VI).Abstract:
Publisher Summary This chapter discusses protonation, oligomerization, and condensation reactions of vanadate(V), molybdate(VI), and tungstate(VI). The elements vanadium, molybdenum, and tungsten in their high oxidation states form the stable oxyanions [VO4]3-, [MoO4]2-, and [WO4]2-. In aqueous solution, these ions are easily protonated and show a strong tendency to form polyoxoanions by oxygen bridging, and the release of water molecules. Depending on pH and concentration, a great variety of ions can form in each case, giving rise to complex systems of simultaneous equilibria, which have proved difficult to characterize with certainty. The molybdate(VI) system, in particular, needs further clarification regarding the existence of some polyions. More kinetic and thermodynamic data would also help to improve the understanding of these systems and lead to a general inclusive explanation of the mechanism of polyoxoanion formation. In this respect, new information about some structural preferences of the different metals in mixed polyoxoanions is a useful addition to known facts regarding polyoxometalate structures.read more
Citations
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Journal ArticleDOI
Leaching mechanisms of oxyanionic metalloid and metal species in alkaline solid wastes: A review
TL;DR: In this article, an overview is presented on possible mechanisms that control the leaching behavior of oxyanion forming elements in cementituous systems and alkaline solid wastes, such as municipal solid waste incinerator bottom ash, fly ash, and air pollution control residues, coal fly ash and metallurgical slags.
Journal ArticleDOI
A comprehensive comparison of transition-metal and actinyl polyoxometalates
May Nyman,Peter C. Burns +1 more
TL;DR: This tutorial review is meant to provide fodder for deriving new POM chemistries of both the familiar transition-metals and the emerging actinides, as well as fostering communication and collaboration between the two scientific communities.
Journal ArticleDOI
Modelling molybdate and tungstate adsorption to ferrihydrite
TL;DR: In this article, the environmental geochemistry of molybdenum and tungsten is not well known, and the authors use batch equilibria to predict Mo and W concentrations in the presence of ferrihydrite (hydrous ferric oxide).
Journal ArticleDOI
The molybdenum blue reaction for the determination of orthophosphate revisited: Opening the black box.
TL;DR: This review aims to rationalise the findings of the many 'optimised' molybdenum blue methods in the literature in terms of the underlying polyoxometallate chemistry and offers suggestions for the further enhancement of this time-honoured analytical reaction.
Journal ArticleDOI
Calculating the partitioning of the isotopes of Mo between oxidic and sulfidic species in aqueous solution
TL;DR: In this paper, the isotopic fractionation equilibrium constants for the isotopes 92Mo and 100Mo between oxic sediments were derived from the calculated vibrational, rotational and translational contributions to the free energy in the gas-phase using quantum methods.
References
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Book
Advanced Inorganic Chemistry
TL;DR: Cotton and Wilkinson's Advanced Inorganic Chemistry (AIC) as discussed by the authors is one of the most widely used inorganic chemistry books and has been used for more than a quarter century.
Journal ArticleDOI
Polyoxometalate Chemistry: An Old Field with New Dimensions in Several Disciplines
Michael T. Pope,Achim Müller +1 more
TL;DR: Inorganic metal-oxygen cluster anions form a class of compounds that is unique in its topological and electronic versatility and is important in several disciplines, such as analytical and clinical chemistry, catalysis (including photocatalysis), biochemistry, and medicine (antitumoral, antiviral, and even anti-HIV activity) as mentioned in this paper.
Book
Heteropoly and Isopoly Oxometalates
TL;DR: A survey of polyoxometalates can be found in this paper, where the authors survey the chemistry, structures, and applications of these species, as well as their applications in inorganic chemistry.