Sökning: "hydrogen-bonds"

Visar resultat 1 - 5 av 97 avhandlingar innehållade ordet hydrogen-bonds.

  1. 1. Proton conducting ionic liquids-Binary mixtures and structural modifications

    Författare :Iqbaal Abdurrokhman; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nanostructure; hydrogen bonds; Protic ionic liquids; fuel cell;

    Sammanfattning : Proton conduction is a phenomenon of fundamental importance for biological and chemical systems, such as in photosynthesis and aerobic respiration. Proton conduction is also key in the proton exchange membrane fuel cell, a clean electrochemical device that converts chemical into electrical energy. LÄS MER

  3. 2. Synthesis of Biomimetic Systems for Proton and Electron Transfer Reactions in the Ground and Excited State

    Författare :Giovanny A. Parada; Sascha Ott; Ana Moore; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Solar energy conversion; artificial photosynthesis; hydrogen bonds; excited state intramolecular proton transfer; tautomerization; proton-coupled electron transfer; photosensitizer; ruthenium complex.; Chemistry with specialization in Organic Chemistry; Kemi med inriktning mot organisk kemi;

    Sammanfattning : A detailed understanding of natural photosynthesis provides inspiration for the development of sustainable and renewable energy sources, i.e. a technology that is capable of converting solar energy directly into chemical fuels. This concept is called artificial photosynthesis. LÄS MER

  4. 3. Proton-Coupled Electron Transfer from Hydrogen-Bonded Phenols

    Författare :Tania Irebo; Leif Hammarström; James M. Mayer; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Proton-coupled electron transfer; phenol oxidation; hydrogen bonds; artificial photosynthesis; promoting vibrations; proton transfer; laser flash-quench; transient absorption.; Physical chemistry; Fysikalisk kemi; Fysikalisk kemi; Physical Chemistry;

    Sammanfattning : Proton-coupled electron transfer (PCET) is one of the elementary reactions occurring in many chemical and biological systems, such as photosystem II where the oxidation of tyrosine (TyrZ) is coupled to deprotonation of the phenolic proton. This reaction is here modelled by the oxidation of a phenol covalently linked to a Ru(bpy)32+-moitey, which is photo-oxidized by a laser flash-quench method. LÄS MER

  5. 4. ESR and ENDOR studies of trapped radicals in Υ-irradiated compounds with hydrogen bonds

    Författare :Ove Edlund; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : .... LÄS MER

  7. 5. Environmental influence on alpha-helical peptides

    Författare :Ana Caballero Herrera; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :MD alpha helix; C-peptide; membrane proteins; hydrogen bonds; packing; dynamics;

    Sammanfattning : Most proteins at physiological conditions fold into a native functional three-dimensional conformation. The stability of the Native state is a balance between different interactions within the protein and with the solvent. LÄS MER