Search for dissertations about: "lone pair"
Showing result 1 - 5 of 18 swedish dissertations containing the words lone pair.
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1. Design of new materials with crystal structure-related properties : The role of lone pair cations
Abstract : Non-centrosymmetry and low-dimensional arrangements, e.g. chains or layers, are very attractive structural characteristics of crystalline compounds since they are linked to some physical properties including nonlinear optical activity, ferroelectricity and magnetic frustration. READ MORE
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2. A new synthetic strategy for low-dimensional compounds : Lone pair cations and alkaline earth spacers
Abstract : Complex transition metals oxyhalides containing a lone pair element, such as tellurium (IV), form an attractive research field because there is a high probability of finding new low-dimensionally arranged compounds and, particularly, a low-dimensionally arranged transition metals substructures, leading to interesting physical properties. Tellurium (IV) can drive the formation of many unusual structures because of its stereochemically active lone pair electrons, E. READ MORE
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3. Transition metal oxofluorides comprising lone pair elements : Synthesis and Characterization
Abstract : Within the family of transition metal oxochlorides/bromides containing lone pair elements, the transition metal cations often adopt a low-dimensional arrangement such as 2D layers, 1D chains or 0D clusters. The reduced dimensionality is attributed to the presence of stereochemically active lone pairs which are positioned in the non-bonding orbital and will not participate in bond formation and instead act as structural spacers that help to separate coordination polyhedra around transition metal cations from forming three dimensional networks. READ MORE
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4. The Role of Tetrahedral Building Blocks in Low-Dimensional Oxohalide Materials
Abstract : The structural architecture found in low-dimensional materials can lead to a number of interesting physical properties including anisotropic conductivity, magnetic frustration and non-linear optical properties. There is no standard synthesis concept described thus far to apply when searching for new low-dimensional compounds, and therefore control on the design of the new materials is of great importance. READ MORE
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5. Lone-pair cations and alkaline earth spacers: A synthetic strategy for low dimensional magnetic compounds
Abstract : .... READ MORE
