Browsing Chemistry by Title
Now showing items 156-175 of 324
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N-butane activation over ruthenium and iron promoted VPO catalysts.
(2009)The Fe- and Ru-promoted vanadium phosphorus oxide (VPO) catalysts were synthesized via the organic route in iso-butanol to form the VPO precursor, VOHPO4·0.5H2O. The resulting precursor was then activated in a stream of ... -
N-heterocyclic carbene-iron(II) complexes : chemistry and application as transfer hydrogenation catalysts.
(2013-11-27)In the last decade N-heterocyclic carbene (NHC) ligands have become important in organometallic chemistry and homogeneous catalysis, rivalling the well established phosphines. Most of the current attention to date has ... -
New dithiophosphonate complexes of nickel, cadmium, mercury and lead.
(2015-01-05)This study was primarily focused on the synthesis and structural X-ray crystallographic analyses of new complexes. The work undertaken investigated the reactivity of the diphosphetane disulfide dimer, [P(4-C6H4OEt)S(S)]2, ... -
Nitrogen- and phosphine-donor ruthenium(II/III) and palladium(II) complexes : synthesis and catalytic hydrogenation of ketones, alkenes and alkynes.
(2016-02-29)The ligands, 2-(2-pyridyl)benzimidazole (L1), 2-(2-pyridyl)bezothiazole (L2), and 2-(2-pyridyl)bezoxazole (L3) were prepared from o-phenylenediamine, o-aminothiophenol and 2-aminophenol, respectively, following literature ... -
Nitrogen-donor late transition metal complexes as ethylene oligomerization catalysts.
Abstract available in PDF file. -
Nitrogen-doped carbon nanotubes : controlled synthesis, physicochemical characterization and application as Pd catalyst supports in a hydrogenation reaction.
(2015)Catalysis is a fundamental pillar in the development of a sustainable economy that is in line with the principles of green chemistry. This drives the need to develop novel catalytic systems whose activity and selectivity ... -
Non-equilibrium quantum dynamics of condensed matter models.
(2013)In this dissertation, we studied the generation of squeezed states induced by a timedependent interaction and the in uence of temperature on the strength of the squeezing in a condensed matter model. The model studied ... -
Novel ruthenium (ll/lll) complexes with multidentate Schiff base chelates containing biologically relevant moieties.
(2014)The discovery of novel ruthenium metallopharmaceuticals is highly dependent on its coordination chemistry. As emphasized in Chapter 1, the biodistribution pathway of a potential ruthenium metallopharmaceutical depends ... -
Organic flame retardants in the indoor environment.
(2016-04-08)Flame retardants (FRs) have become ubiquitous contaminants found in humans, animals, various outdoor environments, e.g. air, soil, sediment, etc., and indoor environments particularly, homes, automobiles, classrooms and ... -
Oxidation and oxidative dehyrogenation of n-octane using V₂O₅ supported on hydroxyapatites.
(2012)Vanadium pentoxide with loadings varying from 2.5-15 wt% was supported on hydroxyapatite (HAp) by the wet impregnation technique. The materials were characterized by techniques such as X-ray powder diffraction (XRD), ... -
The oxidation of n-octane by iridium and cobalt PNP complexes.
(2011)Paraffin activation has practical implications in the replacement of current petrochemical feedstocks (olefins), by utilizing economical and easily accessible alkanes, which may result in more efficient strategies for ... -
Oxidation of primary alcohols to aldehydes and esters.
(1998)The initial aim of this research project was to oxidise Cr C4 alcohols to their respective aldehydes. However, isolation of these aldehydes was impossible due to their low boiling points. Another problem was the proximity ... -
Oxidation of ɳ-octane over molybdenum oxide based catalysts.
(2016-04-11)The research into alternative feedstocks has gained importance in recent years to replace olefins by alkanes. The use of alkanes is viable since they are cheap, abundant and can be easily sourced from Gas to liquid (GTL) ... -
The oxidative activation of n-octane over titania supported cobalt catalysts.
(2015-01-05)This research effort explored routes to valorise alkanes via heterogeneous catalysis. Dehydrogenation and oxidative dehydrogenation are the two routes that were probed in this research effort to activate n-octane by means ... -
Oxidative degradation of textile dyes with hypochlorite and chlorine dioxide.
(2010)The oxidation reaction mechanisms of water soluble textile dyes amaranth (an azo dye), brilliant blue-R (a triaryl dye) and safranine-O (an azine dye) with oxidants- hypochlorite and chlorine dioxide, were investigated. ... -
The oxidative dehydrogenation of n-Hexane and n-Octane over vanadium magnesium oxide catalysts.
(2006)Vanadium magnesium oxide (VMgO) catalysts with different vanadium loadings were synthesized and tested for catalytic activity using pure «-hexane and «-octane as feeds. High surface area catalysts were obtained by the wet ... -
Oxidative dehydrogenation of n-octane over molybdate based catalysts.
(2014)The oxidative dehydrogenation of n-octane over different molybdates was investigated using a continuous flow fixed bed reactor in the temperature range of 350-550 °C at 50 °C intervals. Molybdates investigated in this ... -
Oxidative dehydrogenation of n-octane using vanadium-based hydrotalcite-like compounds.
(2010)The oxidative dehydrogenation of alkanes provides a potential route to higher value products such as olefins and aromatic compounds. Alkanes are of low environmental impact and their increasing availability has prompted ... -
The oxidative dehydrogenation of ɳ-octane using manganese oxide supported on SBA-15 catalysts.
(2014)Supported metal oxides have been widely used in heterogeneous catalysis, particularly for the activation of paraffin’s. For this study, manganese oxide supported on SBA-15 was used to investigate the oxidative dehydrogenation ... -
Oxidative reactions to form ethyl methacrylate via a phase specific iron phosphate catalyst .
(2012)The importance of alkyl methacrylates has been firmly established within the chemical industry. For example, free radical polymers, which contain the methacrylate backbone are more rigid than acrylate polymers. Several ...
