Browsing School of Chemistry and Physics by Title
Now showing items 364-383 of 705
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Mossbauer spectroscopy and x-ray diffraction study of (Cd, Zn) substituted mixed ferrites.
(2002)The study of magnetic properties and structures of Zn and Cd substituted mixed ferrites has been carried out using Mossbauer spectroscopy and X-ray diffraction on powdered samples at about 300 K. Two series of mixed ... -
Mössbauer study of the hyperfine magnetic field and electric field gradient at Fe sites in synthetic diamond.
(1992)Mossbauer Spectroscopy has been used to investigate the site of Fe inclusions in a suite of synthetic diamonds (de Beers MDAS). Information on the hyperfine magnetic fields and electric field gradients at Fe sites in ... -
Multi-wavelength study of radio sources in the universe.
(2009)This thesis presents a detailed multi-wavelength study of radio sources. A major part of the thesis focuses on radio sources in the FIRST survey while the latter part of the thesis studies low redshift radio galaxies in ... -
N- and S-donor pincer complexes of Ni and Cu: synthesis and application as catalysts in alkane oxidation.
(2017)Abstract available in PDF file. -
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.
(2011)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.
(2013)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.
(2015)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 ... -
Non-linear multivariate analysis of the global solar radiation received across five cities in South Africa.
(2019)South Africa is considered one of the most developed countries in Africa, however with more than 80% of its electricity being generated from coal, this country is considered one of the highest contributors to greenhouse ... -
Non-reversal open quantum walks.
(2015)In this thesis, a new model of non-reversal quantum walk is proposed. In such a walk, the walker cannot go back to previously visited sites but it can stay static or move to a new site. The process is set up on a line using ... -
Novel laser beams for optical trapping and tweezing.
(2011)Optical trapping and tweezing has been around for the last 30 years and since found its place in the fields of physics and biology. Over the years this technique has advanced exceedingly and is a unique tool to carry out ... -
Novel pulsed power applications.
(2001)The purpose of this dissertation is to examine the mechanisms of the glow (Townsend) discharge, the arc (streamer) discharge, the corona discharge, and the vacuum discharge. The physics of each discharge is presented and ... -
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 ...