Search for dissertations about: "Organic solvents"

Showing result 1 - 5 of 220 swedish dissertations containing the words Organic solvents.

  2. 1. Mechanisms for Solvolytic Elimination and Substitution Reactions Involving Short-lived Carbocation Intermediates

    Author : Xiaofeng Zeng; Einar Uggerud; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; Organisk kemi; Organic chemistry; Organisk kemi; organisk kemi; Organic Chemistry;

    Abstract : Solvolysis reactions of a range of tertiary substrates in largely aqueous solvents were studied in such respects as β-deuterium kinetic isotope effects, linear free energy relationships and stereochemistry.Solvolysis of the fluorene derivatives 9-methyl–9-(2´-X-2´-propyl)fluorene (1-X, X = Cl, Br, OOCCF3) involves a very short-lived carbocation intermediate. READ MORE

  4. 2. Catalytic and Electrocatalytic Transformations with Palladium and Nickel : Scope and mechanistic investigations

    Author : Alejandro Valiente Sánchez; Belén Martín-Matute; King Kuok (Mimi) Hii; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Organic Chemistry; Heterogeneous Catalysis; Metal-organic frameworks; Nickel; Palladium; Electrocatalysis; Cross-coupling; Hydrogenation; organisk kemi; Organic Chemistry;

    Abstract : The work presented in this thesis is based on methodology development and mechanistic investigations using heterogeneous palladium and nickel catalysts. Following the introduction (Chapter 1), Chapter 2 presents a summary of the synthesis and characterization of the MOF-supported Pd catalysts (Pd @ MOF) that are used in this thesis. READ MORE

  5. 3. New Strategies for Preparing Polymers with Hierarchical Architectures

    Author : Natacha Ndizeye; Ian A. Nicholls; Alessandra Maria Bossi; Linnéuniversitetet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Liquid crystalline media; molecularly imprinted polymers; non-ionic deep eutectic solvents; quartz crystal microbalance; Organic Chemistry; Organisk kemi;

    Abstract : The objective of this thesis was to explore novel approaches for controlling morphologies and molecular recognition behaviour of polymers and to use these strategies in conjunction with the molecular imprinting technique in order to either enhance polymer performance in quartz crystal microbalance (QCM) sensor applications, or as an alternative to conventional solvents of polymerization. In Papers I and II, the use of liquid crystalline media in the synthesis of molecularly imprinted polymers was demonstrated. READ MORE

  6. 4. Dissolution of cellulose in aqueous hydroxide base solvents

    Author : Beatrice Swensson; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; aqueous; NaOH; quaternary ammonium hydroxide; solvent; cellulose; dissolution;

    Abstract : As we move towards a circular bioeconomy, new and advanced materials based on cellulose are constantly developed. Unlike most plastics or metals, cellulose cannot be melted, and therefore dissolution is an important tool for processing of cellulose but also for analytical purposes. READ MORE

  7. 5. Organic solvents and cognitive functioning. With special reference to interaction with aging

    Author : Linda Nordling Nilson; Göteborgs universitet; []
    Keywords : Solvents; occupational; neuropsychology; cognition; aging; chronic toxic encephalopathy; follow-up studies;

    Abstract : The aim of the thesis was to study cognitive functioning in patients with chronic toxic encephalopathy (CTE) and in aging workers previously exposed to organic solvents. The discriminative power of a series of cognitive tests in identifying patients with CTE was examined. READ MORE