Search for dissertations about: "tetramethylammonium"

Showing result 1 - 5 of 12 swedish dissertations containing the word tetramethylammonium.

  2. 1. Dependence of the coordination number of silver(I) in crystalline halogenoargentates(I) on the nature of the cation

    Author : Göran Helgesson; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; clusters; idioargentates I ; halogenocuprates I ; tetraphenylarsonium; crown ethers; tetranuclear; chloroargentates I ; bromoargentates I ; mononuclear; Halogenoargentates I ; heteronuclear; tetraethylammonium; dinuclear; cryptates; tetramethylammonium; crystal structure; silver I ;

    Abstract : .... READ MORE

  4. 2. 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

  5. 3. Organosiloxanes containing cyano groups for capillary chromatography

    Author : Karin Markides; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Methods have been developed for the preparation of capillary columns coated with organosiloxanes containing cyano groups. A procedure was developed for surface modification of the capillary tubing, by means of high temperature silylation. Such a modification gives deactivation and creates a surface suitable for coating with cyanosilicones. READ MORE

  6. 4. Cellulose in quaternary ammonium hydroxide solutions

    Author : Shirin Naserifar; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; quaternary ammonium hydroxides; cellulose; N; N-dimethylmorpholinium hydroxide; Triton B; NaOH; dissolution; TMAH; etherification;

    Abstract : An ever-increasing demand to shift away from fossil-based feedstock towards renewable resources has led to more use of bio-based materials. Cellulose being the most abundant biopolymer on Earth has received a considerable attention with a wide range of applications (in textile fibers, films, membranes, etc. READ MORE

  7. 5. Molecular Interactions Studied by Electrophoretic and Diffusion NMR

    Author : Fredrik Hallberg; Peter Stilbs; István Furó; Gareth Morris; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physical chemistry; NMR; electrophoretic NMR; Ion pairing; complexation; association; diffusion; pulsed field gradient; Nafion; Spectroscopy; Spektroskopi;

    Abstract : Even though electrophoretic NMR (eNMR) experiments may provide unique chemical information and have been performed for three decades, the technique is still rarely applied, mainly because several experimental sources of artifacts have to be controlled to achieve accurate results. In this thesis, new experimental setups and protocols for accurate and precise eNMR experiments are presented. READ MORE