Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Homogeneous Catalyst"”.
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Redox-mediated separation for sustainable chemical manufacturing: Enantioselective separation and homogeneous catalyst recycling
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-12-01
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Oligomerisierung von 1,3-Butadien und Hydroformylierung höherer Olefine zu Oligoaldehyden
… the corresponding oligoaldehydes. Afterwards the homogeneous catalyst system is extracted by carbon dioxide from the product. In the third part of the work a system is introduced which allows the selective hydroformylation of certain olefines out of olefin mixtures with different chain lenghts. …
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The development of novel hetrogeneous catalysts for the hydrogenation of prochiral imines
Catalysts have been studied for the enantioselective hydrogenation of prochiral imines. Work has centred on the support of homogeneous catalysts, with the intention of establishing a heterogeneous catalyst without loss of activity. Initially, established heterogeneous systems were investigated. As …
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Atom transfer radical polymerisation - towards the synthesis of a fully-functional photorefractive polymer
… mediated by CuBr/N-propyl-2- pyridinemethanimine catalyst complex was studied. The polymerisation was ill-controlled, yielding polymers with broad molecular weight distributions and values of number average molecular weight considerably higher than the theoretical values calculated from 100% …
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Total synthesis of naturally occurring glycosylated tetramic acids
… was established using a rhodium based homogeneous catalyst and applying a high-pressure hydrogenation to the tetramic acid. Stable BF2-chelate complexes are here utilized to disarm its metal chelating properties. This procedure allowed assignment of the hitherto unknown absolute …
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Catalyst immobilization techniques for continuous flow synthesis
… expand and evaluate techniques for immobilized catalyst systems relevant to continuous flow. Fundamental studies in characterizing mixing, dispersion, and residence time distributions in small scale continuous flow systems are also presented. Given the numerous benefits associated with studying …
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Molecular Hybrid Photocathodes Based on Silicon for Solar Fuel Synthesis
… from H$_{2}$O and CO$_{2}$). However, molecular catalyst-based photocathodes remain scarcely reported and typically suffer from low efficiencies and/or stabilities due to inadequate strategies for interfacing the molecular component with the light-harvesting material, with benchmark systems …
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Control and Prediction of Polymer Network Structure and Connectivity for Sustainability, Stimuli-Response, and Catalytic Function
… or compact Pd2L4 MOCs as network junctions. Homogeneous catalyst moieties can be covalently appended within the endohedral space of Pd12L24 cross-links, allowing for translation into a heterogenous support with well-defined local environment which can be reused to allow multiple rounds of …
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Production and purification of fatty acid methyl esters from plant oils of different origin
… with a short chain alcohol in the presence of a catalyst. The products of the reaction are fatty acid methyl esters (biodiesel) and glycerol, obtained as two separate phases. However, current reaction efficiency using a homogeneous catalyst, such as sodium hydroxide, has various drawbacks. These …
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SOLID-SUPPORTED PORPHYRINS FOR CATALYSIS AND SENSING
… useful fine chemicals by using convenient both homogeneous and heterogeneous approaches. Regarding the use of innovative heterogeneous systems, in recent years our group developed the possibility of grafting anionic porphyrins onto ColourCatcher® (CC) sheets, a laundry item used for capturing …