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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 27 for “"polyoxometalate"”.
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Polyoxometalate self-assembly : from molecules to framework materials
… synthesis of transition metal substituted heteropolyoxometalates (TMSPs), with particular emphasis on polyanions based on the Keggin structure and lacunary derivatives thereof. In particular, an understanding is gained into the role that N,N’-bis(2-hydroxyethyl)piperazine (bhep) and morpholine …
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Synthesis, morphologies and applications of polyoxometalate-containing diblock copolymers
… various nano or micro sized architectures. Polyoxometalates (POM), on the other hand, being an interesting class of metal-oxygen nanometer-sized anionic clusters, are regarded highly due to their excellent electron accepting capability. Combining POM clusters with diblock copolymers can lead …
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Functional polyoxometalate assemblies: from host-guest complexes to porous frameworks
The host-guest chemistry of two sets of isopolyoxometalate clusters is investigated. In particular the binding modes of cationic alkali and alkali earth metals through coordinative interactions with the cluster anions {Mo36} and {W36} were compared and contrasted. It was shown that the ionic radii …
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Characterization of a Keggin Polyoxometalate on Metal and Semiconductor Surfaces
Finally, studies of alpha-[SiW12O40]4- on Si surfaces are undertaken. In the first route, the Si surface is derivatized with a multicationic layer and alpha-[SiW12O 40]4- is assembled on this layer via electrostatic attraction. Characterization of this layer indicates that there is a substantial …
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Synthesis, structure and mechanism of polyoxometalate self-assembly: towards designed nanoscale architectures
… self-assembly processes by which complex polyoxometalate systems, such as ((n-C4H9)4N)2n(Ag2Mo8O26)n and ((nC4H9)4N)3[MnMo6O18((OCH2)3CNH2)2], are formed. CSI-MS monitoring of the rearrangement of molybdenum Lindqvist anions, [Mo6O19] 2-, in the presence of silver(I) ions, into a …
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Synthesis, non-linear optical and electrochemical properties of novel organoimido polyoxometalate derivatives
… non-linear optics (NLO): organoimido polyoxometalates (POMs). It presents the first experimental measurements of 2nd order NLO (frequency doubling) coefficients (β) (by hyper-Rayleigh scattering, HRS) and the first spectroelectrochemical measurements on such species. Towards the aim of …
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Development of novel optical sensors
… as previously reported in the ink films. Two polyoxometalate based indicators are described: an oxygen indicator and a UV dosimeter. The effects on the sensing characteristics of both inks by varying the key components (i.e. glycerol and polyoxometalate) are reported. Illustrations of the …
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Growth, phase transformation, and self-assembly in iron oxide and uranium oxide nanostructures
… of hierarchical self-assembly of uranium polyoxometalate clusters.
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AQUEOUS REDOX FLOW CELLS FOR LARGE-SCALE ENERGY STORAGE AND CONVERSION
… of ARFCs, new battery chemistry such as polyoxometalate – cerium system is demonstrated in the thesis to expand the overall cell voltage. Besides, the incorporation of redox targeting reaction serves to improve the energy density of ARFCs by the addition of solid energy storage material …
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Targeting isoprenoid biosynthesis for drug discovery
… characterization of novel Mo, W or V-containing polyoxometalate (POM) bisphosphonate complexes with metal nuclearities ranging from 1 to 6 and their potent activities against human cell lines, opening up the possibility of the development of novel drug leads based on …
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Synthesis, Structure, and Characterization of Hybrid Solids Containing Polyoxometalates and Ruthenium Polypyridyl Complexes
<p>Polyoxometalates (POMs), which are inorganic metal oxide cluster anions with discrete structures, have been extensively studied in recent years due to their large variety of applications such as medicine, biology, catalysis, material sciences and chemical analysis. Ruthenium polypyridyl …
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Chemical Sensing of N-Nitrosodimethylamine and Methane
… while the chemical composition of the polyoxometalate (POM) component was also varied. Humidity was determined to most significantly affect the POM and influence the electrical contact between carbon nanotubes and gold. Finally, Chapter 5 presents several modifications of the parent …
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Doped tungsten oxide nanocrystals for next generation electrochromic windows
… guest inorganic materials of niobium polyoxometalate clusters followed by chemical condensation, dual-band modulation of electrochromic films on flexible substrates are demonstrated, tackling cycling stability, and optical modulation issues. Second, how doped semiconductor NCs are …
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Polyoxometalates and Block Copolymers: Templated Self-Assembly for Nanomaterials Applications
… explores templated self-assembly to create polyoxometalate (POM) assemblies in the theme of magnonic crystals. Initially, a selection of POMs are synthesized and characterized with various magnetic techniques. Super conducting quantum interference device (SQUID) magnetometry data presents …
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Synthesis, physical properties and processing of multifunctional molecular materials
… PEDOT films doped with magnetic polyoxometalate (POM) [Co4(H2O)2(PW9O34)2]10- have been obtained; the film obtained by using the potentiodynamic method is more stable than the analogous material obtained by applying a constant potential, when subjected to potential cycles in …
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Organic-inorganic hybrid materials: new functionalised polyoxotungstates
Polyoxometalates are the polyoxoanions of the early transition metals, especially tungsten, molybdenum and vanadium. Although they were first described in the 19th century, their development was slow until modern experimental techniques enabled a greater understanding of their structures and …
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Studies of Conjugated Small Molecules, Polymers and Organic-Inorganic Hybrid Materials for Photovoltaic Applications
… of three different types of materials, namely polyoxometalate (POM)-containing organic-inorganic hybrids, near-IR absorbing conjugated polymers and discotic polycyclic aromatic hydrocarbons. POM-containing organic-inorganic hybrids are interesting because of the potential roles, such as …
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Understanding the deposition of Mg and intercalation of Mg2+ for future Mg-ion batteries
This Thesis was approved for publication on 2015-04-27 at 10:01.
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