Books about Polyoxometalates from Amazon.com

An authoritative up-to-date summary of the chemistry and applications of polyoxometalates with emphasis on new synthetic strategies directed towards functionalized organic derivatives, self-assembly of mesoscopic composite polyoxoanions, generation of framework materials and thin oxide films, extended optical, magnetic, and electrical properties, applications in homogeneous and nanocluster-based catalysts, photocatalytic water decontamination, ribosomal crystallography, and topological aspects of large symmetrical structures..
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Polyoxometalates (POMs) form a large, distinctive class of molecular inorganic compounds of unrivaled electronic versatility and structural variation, with impacts ranging from chemistry, catalysis, and materials science to biology, and medicine. This book covers the basic principles governing the structure, bonding and reactivity of these metal-oxygen cluster anions and the major developments in their molecular science.

The book comprises three sections. The first covers areas ranging from topological principles via synthesis and stability to reactivity in solution. It also focuses on the physical methods currently used to extract information on the molecular and electronic structures as well as the physical properties of these clusters. The second part reviews different types of POMs, focusing on those systems that currently impact other areas of interest, such as supramolecular chemistry, nanochemistry and molecular magnetism. The third section is devoted to POM-based materials and their applications and prospects in catalysis and materials science.

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Metal-Oxygen Clusters is the first book, providing an overview of the surface chemistry and catalytic properties of heteropoly oxometalates. After a brief look at the early knowledge of heteropoly oxometalates, the book discusses the synthesis, characterization, structure, bulk properties and stability of these materials. The remainder and the largest portion of the book explores the properties of these solids as catalysts in acid-catalyzed and oxidation processes in supported or unsupported forms.
The book provides an up-to-date review of the methods for synthesizing heteropoly oxometalates of Keggin structure, techniques from spectroscopic through electrochemical to elemental analysis for their characterization and the current information on their structure, bulk properties and their stabilities at high temperatures and under acid and alkaline conditions. The book discusses the materials employed as supports for the title solid and the results of the examination of the supported materials. Methods for the identification of the nature and source of the two catalytic functions, the acidic and oxidative properties, of the heteropoly oxometalates are reviewed and discussed. The use of both the supported and unsupported heteropoly oxometalates as catalysts in acidity-requisite processes ranging from methanol conversion to hydrocarbons to ring-expansion and contraction processes and in oxidation processes from methane cyclohexane are described and related to the aforementioned properties..
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This digital document is a journal article from Analytica Chimica Acta, published by Elsevier in 2005. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
The transition metal-substituted heteropolyoxoanion, Cd"4(H"2O)"2(As"2W"1"5O"5"6)"2^1^2^- (As"4W"3"0Cd"4), is one of the trivacant Dawson derivatives. Its redox electrochemistry has been studied in acid buffer solutions using cyclic voltammetry. It exhibited three steps of four-electron redox waves attributed to redox processes of the tungsten-oxo framework. Through layer-by-layer assembly, the compound was first successfully immobilized on a 4-aminobenzoic acid modified glassy carbon electrode surface by alternate deposition with a quaternized poly(4-vinylpyridine) partially complexed with [Os(bpy)"2Cl]^2^+^/^+ (denoted as QPVP-Os). Thus, prepared multilayer films have been characterized by cyclic voltammetry (CV), X-ray photoelectron spectroscopy (XPS) and UV-vis spectroscopy (UV-vis). The electrocatalytic activities of the multilayer films containing As"4W"3"0Cd"4 have been investigated on the reduction of three substrates of important analytical interests, NO"2^-, BrO"3^- and IO"3^-. And with the increase of the number of As"4W"3"0Cd"4 layers, the catalytic current towards the reduction of BrO"3^- was enhanced and the catalytic potential shifted positively. .
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This digital document is a journal article from Analytica Chimica Acta, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
In this work, we have developed a convenient and efficient method for the functionalization of ordered mesoporous carbon (OMC) using polyoxometalate H"6P"2Mo"1"8O"6"2.xH"2O (P"2Mo"1"8). By the method, glassy carbon (GC) electrode modified with P"2Mo"1"8 which was immobilized on the channel surface of OMC was prepared and characterized for the first time. The large specific surface area and porous structure of the modified OMC particles result in high heteropolyacid loading, and the P"2Mo"1"8 entrapped in this order matrix is stable. Fourier transform infrared spectroscopy (FTIR), nitrogen adsorption-desorption isotherm and X-ray diffraction (XRD) were employed to give insight into the intermolecular interaction between OMC and P"2Mo"1"8. The electrochemical behavior of the modified electrode was studied in detail, including pH-dependence, stability and so on. The cyclic voltammetry (CV) and amperometry studies demonstrated that P"2Mo"1"8/OMC/GC electrode has high stability, fast response and good electrocatalytic activity for the reduction of nitrite, bromate, idonate, and hydrogen peroxide. The mechanism of catalysis on P"2Mo"1"8/OMC/GC electrode was discussed. Moreover, the development of our approach for OMC functionalization suggests the potential applications in catalysis, molecular electronics and sensors. .
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This book covers a comprehensive study on the new-concept inorganic nanocomposite materials. The idea is to get nanocomposite from ionic interaction between polyoxometalate anions (Mo7, AlMo6, W12, V2W4) and aluminum cations (Al13, Al30). Their self assembly in aqueous solution produced solid nanocomposite material in the form of single crystals or gels. Single crystals of Al13-2AlMo6, Al13-W12, Al13-2V2W4, W2Al28-2W12 has been fully characterized. The structural determinations show that hydrogen bonding and Coulombic force dominate the intercluster interactions. Their polyhedral shapes results in interesting molecular packing scheme. And packing of nanometer size clusters leads to the formation of large pores, which could be utilized to sorptive materials or catalysts. Al13-2AlMo6 crystals demonstrate reversible and selective adsorption of water in their pores.Also included are 1) self-assembly of oppositely charged silica or polymer spheres with different sizes, 2) nickel fine particle synthesis for MLCC application, 3) surface modification or coating of inverse opal carbon materials with polyoxometalate or metal..
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Whole journals are devoted to catalysis and books describe the various catalysts. However it is very difficult to find detailed protocols offering information on where to source catalysts, how to store them, how to activate them for the synthesis, how to perform the actual synthesis and how to recycle the catalysts out of the synthesis process.

This new series of books (accompanied by CD-ROM) addresses all these issues. Each volume publishes approximately 40 detailed procedures and makes use of different catalysts. They are classified according to the type of reaction they are catalysing and in addition a section included incorporates reviews, comparisons between the different types of catalysts and highlights from research in the previous year.
It includes approximately 40 detailed procedures and describes the use of different catalysts and is classified according to the type of reaction they perform.

The chemist has a vast choice of high-tech catalysts to use when working in fine chemical synthesis but the catalysts are hard to use and require both skill and experience to handle properly. This book contains tested and validated procedures and provides a unique resource for chemists who work in organic chemistry..
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This digital document is a journal article from Journal of Hazardous Materials, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
Titanium dioxide functionalized with Keggin type polyoxometalate (POMs) [X^n^+W"1"2O"4"0]^(^8^-^n^)^- (XW"1"2; X^n^+=P^5^+, Si^4^+, Ge^4^+) were prepared by sol-gel method. The Keggin structure and dispersion state of POMs were monitored by FT-IR and XRD. The composites showed higher photocatalytic activity than pure TiO"2, pure POMs or mechanical mixture of TiO"2 and POMs for X-3B degradation. Among the three POMs-TiO"2 hybrid materials, the reactivity was: PW"1"2>SiW"1"2>GeW"1"2. With different loading weights for the same POMs, the reactivity followed the order: 30wt.%>15wt.%>45wt.%. .
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