Search for dissertations about: "hydrogen transfer reaction"

Showing result 21 - 25 of 96 swedish dissertations containing the words hydrogen transfer reaction.

  2. 21. Multiscale interfacial engineering of heterogeneous electrocatalysts : From structural design to mechanistic study

    Author : Shiqi Zhou; Jiayin Yuan; Martin Oschatz; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; heterogeneous electrocatalysis; electronic structure; coordination environment; single-atom catalysts; strain effect; hydrogen evolution reaction kinetics; charge transfer; electrochemical CO^2 reduction; local enrichment; materialkemi; Materials Chemistry;

    Abstract : In a typical heterogeneous electrocatalytic reaction, for the given active sites, the electronic structure plays a determining role in electron transfer between the active sites and reactant molecules, which impacts the reaction efficiency. Besides the electronic properties of the electrocatalysts, the reaction interface at which the charge transfer occurs plays an important role in the reaction kinetics. READ MORE

  4. 22. N-Heterocyclic Carbene-Phosphine Iridium Catalyzed Alkylation Reactions and Asymmetric Hydrogenation of Ketones

    Author : Sutthichat Kerdphon; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; C-C coupling reactions; hydrogen transfer; iridium; ketones; methylation;

    Abstract : This thesis is focused on hydrogen transfer reactions using N-heterocyclic carbenephosphine iridium catalysts and is divided in two parts. The first part describes the use of achiral N-heterocyclic carbene-phosphine iridium complexes catalyzing the methylation of ketones and alkylation of amides using alcohols as the electrophile. READ MORE

  5. 23. DNA-Photosensitization by New Drugs for Photoinactivation of Viruses and Phototherapy of Tumors

    Author : Claire Kanony; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; 7; hydroxyl radicals; singlet oxygen; 8-dihydro-8-oxo-deoxyguanosine; pyropheophorbides; electron transfer; DNA damage; hydrogen abstraction; cyanine dyes;

    Abstract : Cyanines and pyropheophorbides are two classes of photoactivable dyes which are particularly interesting for photosterilization of blood used in transfusion and for treatment of localised cancers by photodynamic therapy (PDT). After a bibliographic review about the principal mechanisms of DNA photosensitization, studies about the photosensitizing properties of these two families of compounds are presented. READ MORE

  6. 24. Transition Metal- and Enzyme-Catalyzed Reactions of Primary Amines and Allylic Alcohols : Powerful Tools in the Preparation of Pharmaceutically Important Compounds

    Author : Lisa K. Thalén; Jan-Erling Bäckvall; Dirk De Vos; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Dynamic kinetic resolution; racemization; catalysis; hydrogen transfer; kinetic resolution; norsertraline; alpha-methyl carboxylic acids; pipecoloxylidide; organisk kemi; Organic Chemistry;

    Abstract : Dynamic kinetic resolution (DKR) has been applied to primary amines utilizing a ruthenium catalyst and an (R)-selective lipase to provide the corresponding amides in up to 95% isolated yield and up to >99% ee. Further investigations of the chemoenzymatic DKR of amines show that it is general and can be applied to a wide range of amines. READ MORE

  7. 25. Engineering inorganic nanostructured composites for boosting H2 and O2 evolution reactions

    Author : Getachew Solomon; Isabella Concina; Alberto Vomiero; Sixto Gimenez; Luleå tekniska universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hydrogen evolution HER ; Oxygen evolution reaction OER ; Oxygen reduction reaction ORR ; Water splitting; Electrocatalyst; Atomic layer deposition; Core-shell structure; Experimentell fysik; Experimental Physics;

    Abstract : Hydrogen is considered a promising energy source with zero emission of CO2; it can provide higher energy density compared to other sources of energy. The amount at which H2 is produced, and the method of production need further improvement for the advancement of hydrogen energy technologies. READ MORE