Sökning: "cation position"

Visar resultat 1 - 5 av 13 avhandlingar innehållade orden cation position.

  1. 1. Alkali titanyl phosphates : structures and properties

    Författare :Joacim Gustafsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; rtp; non-linear optical materials; rubidium titanium phosphate; langbeinite; cation position; phase transition;

    Sammanfattning : .... LÄS MER

  3. 2. Using de novo design proteins to explore tyrosine radicals and cation-π interactions

    Författare :Bruce W. Berry; Cecilia Tommos; Anders Hofer; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; tyrosine; radicals; cation-pi interactions; de novo designed proteins; biochemistry; biophysics; Biochemistry; biokemi;

    Sammanfattning : Redox cofactors and amino-acid free radicals play important roles in biology. Although many of the same cofactors and amino acids that form these radicals are found across a broad range of biological systems, identical cofactors can have different reduction potentials. The local environment plays a role in defining these redox potentials. LÄS MER

  4. 3. Carbocation Catalysis for Organic Synthesis

    Författare :Shengjun Ni; Johan Franzén; Bernd Plietker; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; carbocation; trityl cation; Lewis acid catalyst; enantioselective; chiral counteranion; oxa-Diels–Alder; bromination; aldehyde–olefin metathesis; Kemi; Chemistry;

    Sammanfattning : The most common view of carbocations in organic chemistry is that they are short-lived intermediates in several fundamental reactions, e.g. the classic SN1-reaction. LÄS MER

  5. 4. Functional Oxide Materials exhibiting Ionic Conductivity for Future Energy Conversion Needs

    Författare :FRANCIS GACHAO KINYANJUI; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; neutron diffraction; perovskites; oxygen deficient perovskites; BaSnO3; Rietveld refinements; BaZrO3; in-situ cells; proton conduction; deuteron position; Ba3In2ZrO8;

    Sammanfattning : Fuel cells are electrochemical devices that transform the chemical energy in hydrogen and oxygen into electrical energy at high efficiencies and produce only water vapour emissions. Materials with the perovskite or fluorite structure types are commonly employed as the ion conducting ceramic electrolyte membranes in intermediate and high temperature fuel cells. LÄS MER

  7. 5. Structural investigation of Nb-based layer sulfides

    Författare :Alexander Grippa; Sven Lidin; Pedro Berastegui; Carlos Otero Díaz; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nb-based sulfides; misfit layered; structure determination; electron diffraction; Chemistry; Kemi;

    Sammanfattning : In this work we have investigated the intercalation of electron-donors between NbS2 slabs in Nb-based layer sulfides.Two series of Sr substituted Nb-based misfit sulfides belonging to the 1.5Q/1H and 1Q/1H series of misfit layer compounds have been synthesised. LÄS MER