Sökning: "palladium chloride"

Visar resultat 1 - 5 av 22 avhandlingar innehållade orden palladium chloride.

1. 1. Heck Reactions with Aryl Chlorides : Studies of Regio- and Stereoselectivity

   Författare :Gopal K. Datta; Mats Larhed; Anders Hallberg; Martin Oestreich; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Heck reaction; aryl chloride; vinyl ether; regioselective; stereoselective; palladium; chelation control; microwave; Pharmaceutical chemistry; Farmaceutisk kemi;

   Sammanfattning : Homogeneous palladium-catalyzed Heck vinylation of aryl chlorides was investigated under air using Herrmann’s palladacycle and the P(t-Bu)3-liberating salt [(t-Bu)3PH]BF4. Based on the results, controlled microwave heating was utilized to accelerate model Heck reactions with aryl chlorides down to 30 min employing an electron-poor olefin and a mixture of an ionic liquid and 1,4-dioxane as solvent. LÄS MER

3. 2. Unveiling Catalytic Species in Suspension/Solution-Based Reactions by In Situ X-Ray Absorption Spectroscopy : Evolution of Palladium and Ruthenium Species

   Författare :Ning Yuan; Xiaodong Zou; Ingmar Persson; Gopinathan Sankar; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Palladium and ruthenium species; Catalysts; Suspension and solution; In situ X-ray absorption spectroscopy; Activation; Deactivation; Inorganic Chemistry; oorganisk kemi;

   Sammanfattning : The palladium (Pd) and ruthenium (Ru) species in several attractive catalysts have been probed using X-ray absorption spectroscopy (XAS). The study of catalyst evolution in suspension- and solution-based reactions was the primary aim. It was achieved by performing in situ XAS experiments on Pd and Ru over the course of the reactions. LÄS MER

4. 3. Shape Control Synthesis and Microstructure Studies of Metal Nanoparticles

   Författare :Xin Wen; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; hexadecyltrimethylammonium bromide; sodium oleate; polyvinylpyrrolidone; Gold nanorod; palladium nanodendrite; seed mediated growth; transmission electron microscopy; hexadecyltrimethylammonium chloride;

   Sammanfattning : Metal nanoparticles have been extensively studied in recent years due to their unique chemical, biological and physical properties. Gold (Au) and palladium (Pd) nanoparticles are two of the most popular materials because Au nanoparticles have a strong localized surface plasmon resonance effect and Pd nanoparticles have high hydrogen adsorption and chemical catalytic capacities. LÄS MER

5. 4. Synthesis of Covalently Linked Diporphyrins: Model Compounds for Intramolecular Energy and Electron Transfer

   Författare :Johan Kajanus; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; donor-bridge-acceptor systems; Sonogashira reaction; electron transfer; porphyrin; palladium; model compound; energy transfer;

   Sammanfattning : Three series of donor-bridge-acceptor compounds have been synthesized to probe the influence of various bridge chromophores on energy and electron transfer. The donor-bridge-acceptor compounds in each series comprise two different porphyrins, acting as donor and acceptor, covalently linked by bridge chromophores. LÄS MER

7. 5. Patch testing with palladium and aluminium, epidemiological and experimental studies

   Författare :Lisbeth Rosholm Comstedt; Yrkes- och miljödermatologi; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Contact allergy to palladium; prevalence of metal allergy; patch testing with palladium; natrium tetrachloropalladate; palladium chloride; Finn Chamber; patch testing with aluminium; isolated palladium allergy; patch test system; adjuvants in patch testing; delayed hypersensitivty reaction;

   Sammanfattning : AbstractThe aim of this thesis was to investigate the prevalence and significance of contact allergy to palladium from a Swedish perspective. Our initial findings made it necessary to also explore the importance of the metal aluminium used in test chamber systems and the effect of aluminium chloride (Al-Cl) in patch test preparations. LÄS MER