Search for dissertations about: "Mesocellular foam"

Showing result 1 - 5 of 6 swedish dissertations containing the words Mesocellular foam.

  2. 1. Catalytic reactions with palladium supported on mesocellular foam : Applications in hydrogenation, isomerization, and C-C bond forming reactions

    Author : Anuja Nagendiran; Jan-Erling Bäckvall; Shu Kobayashi; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Mesocellular foam; Heterogeneous palladium catalysis; nanopalladium; organisk kemi; Organic Chemistry;

    Abstract : The major part of this thesis concerns the development of catalytic methodologies based on palladium nanoparticles immobilized on aminopropyl-functionalized siliceous mesocellular foam (Pd0-AmP-MCF). The catalytic activity of the precursor to the nanocatalyst, PdII-AmP-MCF is also covered by this work. READ MORE

  4. 2. Transition Metal-Catalyzed Redox Reactions : A Journey from Homogeneous Ruthenium to Heterogeneous Palladium Catalysis

    Author : Oscar Verho; Jan-Erling Bäckvall; Manfred Reetz; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; organisk kemi; Organic Chemistry;

    Abstract : The first part of the thesis covers the development and utilization of electronically modified (pentaarylcyclopentadienyl)Ru-complexes in the racemization of secondary alcohols. This study revealed that the electronic properties of the substrate were the main factors dictating whether β-hydride elimination or hydride re-addition becomes the rate-determining step of the racemization process. READ MORE

  5. 3. Development and Applications of Surface-Confined Transition Metal Complexes : Heterogeneous Catalysis and Anisotropic Particle Surfaces

    Author : Kristofer Eriksson; Jan-Erling Bäckvall; Graham Hutchings; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; heterogeneous catalysis; anisotropic particles; protein gradients; nanoparticles; organisk kemi; Organic Chemistry;

    Abstract : The main focus of this thesis has been directed towards developing novel surface-confined transition metal complexes for applications in heterogeneous catalysis and for the preparation of anisotropic particle surfaces. The first part describes the heterogenization of a homogeneous transition metal-based catalyst tetraphenyl cobalt porphyrin (CoTPP) on silicon wafers and on silica particles. READ MORE

  6. 4. Transition metal-catalyzed hydrogen transfer processes

    Author : Oscar Verho; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : The first part describes the synthesis of new analogues of Bäckvall’s catalyst with varying electronic properties and their application in the racemization of sec-alcohols. The racemization involves two key steps: (i) β-hydride elimination (dehydrogenation of the alcohol) and (ii) hydride re-addition to the intermediate ketone. READ MORE

  7. 5. Enzyme- and Transition Metal-Catalyzed Asymmetric Transformations : Application of Enzymatic (D)KR in Enantioselective Synthesis

    Author : Richard Lihammar; Jan-Erling Bäckvall; Wolfgang Kroutil; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Dynamic Kinetic Resolution; Kinetic Resolution; Enzyme Catalysis; Asymmetric Synthesis; organisk kemi; Organic Chemistry;

    Abstract : Dynamic kinetic resolution (DKR) is a powerful method for obtaining compounds with high optical purity. The process relies on the combination of a kinetic resolution with an in situ racemization. READ MORE