Sökning: "Donor-Acceptor Complexes"

Visar resultat 6 - 9 av 9 avhandlingar innehållade orden Donor-Acceptor Complexes.

  1. 6. 31 P- and 65 Cu- solid state NMR studies of Cu(I) di-alkyl-dithiophosphates : complex Formation Mechanism on Synthetic Chalcocite Surfaces

    Författare :Daniela Rusanova; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry of Interfaces; Gränsytors kemi;

    Sammanfattning : Alkyl substituted derivatives of dithiophosphoric acid are frequently used as collectors in froth flotation enrichment of copper sulfide ores. Due to interaction between Cu atoms at the surface and thiol collector molecules, a concomitant adsorption process occurs on the mineral surface. LÄS MER

  3. 7. An Investigation of Peroxidase Activity in Biomimetic and Biological Systems

    Författare :Ekaterina Ryabova; Kemiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; metabolism; Metabolism; enzymologi; Proteiner; enzymology; Proteins; hemoglobin; catalysis; peptide; peroxidase; protoporphyrin IX; Biokemi; Biochemistry;

    Sammanfattning : In order to create a heme environment which permits biomimicry of heme-containing plant peroxidases and investigate the role played by the vinyl side chains of the porphyrin ring on the stability and, possibly, catalytic activity of model compounds, a number of new synthetic microperoxidases -– hemin-6(7)-gly-his methyl ester (HGH) and hemin-6(7)-gly-gly-his methyl ester (HGGH) and hemin-6,7-bis(gly-gly-his methyl ester) (H2GGH) as well as mesohemin-6(7)-gly-gly-his methyl ester (MGGH) and deuterohemin-6(7)-gly-gly-his methyl ester (DGGH) have been prepared by condensation of a peptide residue with the propionic side chains of hemin, mesohemin and deuterohemin, respectively. Reactivity studies towards different organic and inorganic substrates showed that not only five- but also six-coordinate hemin peptide complexes catalyze the oxidation of substrates by H2O2. LÄS MER

  4. 8. Energy Transfer Patterns in Photosynthetic Antenna System of Purple Bacteria

    Författare :Susan Hess; Kemisk fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; optics; Electromagnetism; mykologi; virologi; bakteriologi; photosynthesis; Mikrobiologi; Picosecond and femtosecond spectroscopy; energy transfer; purple bacteria.; Microbiology; bacteriology; mycology; virology; acoustics; Elektromagnetism; optik; akustik; Fysicumarkivet A:1997:Hess;

    Sammanfattning : Steady state and time-resolved absorption and fluorescence spectroscopy have been used to investigated the energy transfer in photosynthetic purple bacteria. Picosecond light pulses were used in measurements of Rb. LÄS MER

  5. 9. Towards flexible organic electronics : photoelectron spectroscopy of surfaces and interfaces

    Författare :Stina Jönsson; Ian D. Parker; Linköpings universitet; []
    Nyckelord :TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : Intensive studies of conjugated molecules and polymers are carried out all over the world with the intent of obtaining cheap and efficient organic electronic devices. The most mature application at the moment is the light-emitting diode, but also photovoltaic cells and different types of transistors shows promising results. LÄS MER