Search for dissertations about: "counterions"

Showing result 6 - 10 of 39 swedish dissertations containing the word counterions.

  2. 6. Controlling Structure and Water Miscibility of Polyion - Surfactant Ion Complex Salts

    Author : Jens Norrman; Fysikalisk kemi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physical chemistry; Fysikalisk kemi; phase diagram; cubic Pm3n; hexagonal; lamellar; self diffusion; PFG NMR; SAXS; liquid crystals; polymer; counterion; complex; polyelectrolyte; surfactant;

    Abstract : The interaction between poylions and oppositely charged surfactant ions has been investigated. This has been done by using the pure complex salt (polyion + surfactant ion) as a point of departure. Different parameters of the complex salt have been varied in a systematic way and the effect on structure and water miscibility has been investigated. READ MORE

  4. 7. Oppositely Charged Polyelectrolytes in Solution

    Author : Yoshikatsu Hayashi; Fysikalisk kemi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physical chemistry; Monte Carlo simulation; analytical theory; Fysikalisk kemi;

    Abstract : This thesis is about the formation of complexes in solutions of oppositely charged polyions. We consider mainly three topics: 1)Monte Carlo simulations of oppositely charged polyelectrolytes with a focus on cluster compositions. READ MORE

  5. 8. Stabilisation of electron dense transition metal hydrogen complexes in the solid state

    Author : Malin Olofsson-Mårtensson; Donald E Linn; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; strukturkemi; Structural Chemistry;

    Abstract : The formation, structure and bonding in the solid state homoleptic palladium-hydrogen complexes; K2[PdIIH4], Li2[Pd0H2], Na2[Pd0H2], NaBa[Pd0H3], Sr2[Pd0H4] and Ba2[Pd0H4]have been studied by means of X-ray and neutron diffraction, infrared-, Raman-, and inelastic neutron spectroscopy.The results from these investigations combined with theoretical calculations have identified a new stabilisation model for electron dense transition metal hydrogen complexes which is described in this thesis. READ MORE

  6. 9. Effects of polyelectrolyte conformation, charge density and ion specificity in polyelectrolyte and polyelectrolyte-drug interaction

    Author : Andreas M. Hugerth; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pharmaceutical chemistry; Farmaceutisk kemi; Pharmaceutical chemistry; Farmaceutisk kemi; Physical and Inorganic Pharmaceutical Chemistry; fysikalisk och oorganisk farmaceutisk kemi;

    Abstract : The central theme is how the structural characteristics of sulphated polyelectrolytes and theirinteraction with counter- and coions determine the degree of polyelectrolyte self-association (gelformation), interaction with oppositely charged polyelectrolyte and polyelectrolyte-amphiphilic druginteraction in protolytic solvent medium. Such knowledge is essential for understanding and regulatingthe interaction between polyelectrolytes as well as between polyelectrolytes and a drug substance in apharmaceutical formulation and for its fate in the human organism. READ MORE

  7. 10. Aqueous behaviour of characteristic molecules in the synthesis of porous silica materials : - an atomistic description

    Author : Emelie Nilsson; Fysikalisk kemi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; porous silica; struture directing agents; 29Si-NMR; neutron scattering; empirical potentail structure refinement; micelles;

    Abstract : The formation process of porous silica materials is an intricate process, involving a number of components that interact to form a highly organized material. Both zeolites and mesoporous silica materials typically require the presence of organic structure director agents (SDAs) around which the silica network polymerizes. READ MORE