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Showing 1 to 16 of 16 for “"Polyoxometalates"”.
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Reaction of Aqueous Polyoxometalates With Silver and Gold Surfaces
Preliminary experiments to study the reaction of acidic aqueous solutions of the Preyssler anion, NaP5W30O110 14-, with Ag(111) show that a surface phase is formed. Immersion of Au(111) in the same solutions yielded STM images that did not show evidence of a surface phase. By using a mixture of …
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Polyoxometalates and Block Copolymers: Templated Self-Assembly for Nanomaterials Applications
Periodically ordered materials often present unique features. From photonic and phononic crystals to semi-conductors, the periodic structuring of materials has found widespread use in areas such as computing, catalysis, and energy conversion. Magnonic crystals are periodically ordered magnetic …
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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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Syntheses and structures of some polyoxomolybdates and polyoxotungstates
… possible through the absolutely unique class of polyoxometalates. In solutions of oxoanions of the early transition metals - in particular molybdates and tungstates - an enormous variety of compounds can be formed by linking together metal-oxide building blocks. In this dissertation we …
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Water oxidation catalysis beginning with cobalt polyoxometalates: determining the dominant catalyst under electrocatalytic conditions and investigation of the surface properties of Co3O4 nanoparticles
… examines a class of inorganic compounds called polyoxometalates (POMs), and investigates the nature of the kinetically dominant, homogeneous vs heterogeneous catalyst. Chapter I provides an in depth introduction to water oxidation catalysis and in particular with cobalt-based POMS. Chapters II …
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Polyoxomolybdates with emergent properties
… the coordination chemistry is presented by the polyoxometalates which can be considered as soluble metal-oxide fragments with an enormous structural variety and a multitude of interesting properties. The present thesis is dealing with self-assembly processes of polyoxomolybdates but also with …
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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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Applications for imidazophenanthridine-based heterocycles
… cations and amino functionalised polyoxometalates (POMs). 1,2,3,12b-tetrahydroimidazo[1,2-f]phenanthridines (TIPs), an intermediate in the 3-step cascade synthesis of DIPs, have also been isolated. Derivatisation of the TIP structure at the imidazo-N position enables control of the …
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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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Functional polyoxometalate assemblies: from host-guest complexes to porous frameworks
… In a different approach, the cross-linking of polyoxometalates using transition metal linkers in organic solvents was studied. It was shown that silver(I) cations are highly versatile linking units and allow the linking of {V10} cluster anions into 1D zigzag chains and 2D planar networks. The …
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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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Characterization of a platinum-substituted keggin anion and studies of robust, hydrogen-bonded polyanion aggregates
Solution and solid-state studies of platinotungstate and platinomolybdate heteropolyanions were carried out. Salts of the Keggin-type -SiPtW11O406- anion (1) were prepared through the reaction of K8SiW11O39.13H2O with K2Pt(OH)6 and acidification of the reaction solution to pH 4 with HNO3. Infrared …
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Estudios estructurales sobre entidades tiosemicarbazonacobre(II) y su interacción con polioxometalatos y biomoléculas. Síntesis, estabilidad y propiedades magnéticas
Estudios estructurales sobre entidades tiosemicarbazonacobre(II) y su interacción con polioxometalatos y biomoléculas. Síntesis, estabilidad y propiedades magnéticas” El presente Trabajo ahonda en la síntesis y caracterización de nuevos derivados de Cu(II) con los ligandos 2–piridinacarbaldehído …
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Modeling the interface between biological and synthetic components in hybrid nanosystems
The fusion of biology and nanotechnology holds amazing promise for revolutionizing medicine and personal technology. In order to take advantage of the great feats of engineering coming out of these fields, there needs to be theories and computational tools capable of describing the interface …