Sökning: "homogeneous catalysis"

Visar resultat 21 - 25 av 36 avhandlingar innehållade orden homogeneous catalysis.

  1. 21. Studies on Metalloenzymatic Dynamic Kinetic Resolutions and Iron-Catalyzed Reactions of Allenes

    Författare :Karl P. J. Gustafson; Jan-Erling Bäckvall; Johannes de Vries; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Racemization; Dynamic Kinetic Resolution; Enzyme Catalysis; XAS; Asymmetric Synthesis; organisk kemi; Organic Chemistry;

    Sammanfattning : The main focus of this thesis lies in the development of new transition metal-catalyzed chemoenzymatic dynamic kinetic resolutions (DKR) of both alcohols and amines. The first part of the thesis deals with the development of new heterogeneous systems for the DKR of amines. LÄS MER

  3. 22. Synchrotron-based In Situ Electron Spectroscopy Applied to Oxide Formation and Catalysis

    Författare :Niclas Johansson; Synkrotronljusfysik; []
    Nyckelord :CO oxidation; Sonogashira cross-coupling; trilayer FeO; vicinal FeO; Mn III -salen; APXPS; XAS; Fysicumarkivet A:2017:Johansson;

    Sammanfattning : In this thesis, in situ ambient pressure X-ray photoelectron spectroscopy has been used to address chemical reactions on surfaces. The presented work aims at the investigation of the relation between pressure and adsorbate surface structures during catalytic reactions. LÄS MER

  4. 23. Heterogenization of a Cobalt Porphyrin Catalyst Investigated by Scanning Probe Microscopy and X-Ray Photoelectron Spectroscopy: The Effect on Catalysis of Oxidation Reactions

    Författare :Greger Ledung; Sven Oscarsson; Claire-Marie Pradier; Mälardalens högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Other chemical engineering; Övrig kemiteknik; Bioteknik kemiteknik;

    Sammanfattning : Construction of advanced materials through self-assembly on the molecular level is an important route to achieve novel functionality. Self-assembly of thiols onto gold has during the last decades shown greate promise in the creation of functional nanomaterials, such as sensors or catalysts, but for many applications silicon should be a better substrate since it offers semiconducting properties and better processing abilities in addition to being cheaper. LÄS MER

  5. 24. Photocatalysis beyond conventional precious metal complexes

    Författare :Rickard Lindroth; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Heterogenization; Iron photocatalysis;

    Sammanfattning : Precious metals, e.g. Ru and Ir, are expensive, scarce and non-renewable resources. As oppose to many renewable resources, these cannot be deliberately produced wherever one wishes. LÄS MER

  7. 25. Iron-Catalyzed Reactions and X-Ray Absorption Spectroscopic Studies of Palladium- and Ruthenium-Catalyzed Reactions

    Författare :Arnar Guðmundsson; Jan-Erling Bäckvall; Hans-Joachim Knölker; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Iron; XAS; Cycloisomerization; DKR; Oxidation; organisk kemi; Organic Chemistry;

    Sammanfattning : The focus of this thesis is twofold: The first is on the application of iron catalysis for organic transformations. The second is on the use of in situ X-ray absorption spectroscopy (XAS) to investigate the mechanisms of a heterogeneous palladium-catalyzed reaction and a homogeneous ruthenium-catalyzed reaction. LÄS MER