The availability of surplus capital from the oil producing Arab Gulf States has allowed joint ventures to become an economic reality and important Arab World phenomenon. Using appropriate methodology, projections have been made of population growth, petrochemical production leve…
"562" Result
Sort By:
The work described in this thesis is concerned with laser kinetic and spectroscopic investigations of two distinct types of charge-separation process following electronic excitation, namely, (i) the kinetics of quenching by intermolecular electron-transfer and (ii) the developme…
This thesis describes attempts to use palladium-catalysed cross-coupling methodology in the synthesis of α,α-difluoroketones contained within a diverse array of molecular motifs. 1-(N,N-Diethylcarbamoyloxy)-2,2-difluoro-1-(tributylstannyl)ethene undergoes Stille cross coupling w…
The work presented in this volume covers two distinct fields of zeolite chemistry. The first section of this thesis is dedicated to the synthesis of zeolites A (LTA), X (FAU), Y, (FAU) and rho (RHO) in a microwave oven. Results have demonstrated that when zeolitic gels are heate…
EDITED ABSTRACT. This thesis is divided into two parts. The first part describes the production of a small stereodiverse library of 2-substituted piperidines. Novel chiral titanium alkylidene reagents ii alkylidenated resin-bound esters i to give acid-labile resin-bound enol eth…
The marine biogeochemistry of dissolved organic carbon (DOC) has come under increased scrutiny because of its involvement in the global carbon cycle and consequently climate change. Dissolved organic nitrogen (DON) and phosphorus (DOP), which have historically been ignored becau…
The aim of this thesis was to improve our understanding of the natural iron fertilisation processes that can alleviate the High Nutrient Low Chlorophyll conditions normally associated with the Southern Ocean. The annual phytoplankton bloom occurring north of the Crozet Plateau (…
Steam reforming of CH4 is an established industrial process for the formation of synthesis gas. It takes place in two reversible stages: CH4 reforming reaction (1) followed by the water-gas shift (2). (Fig. 3599A) The biggest worry to the steam reforming industry is the formatio…
The main aim of this project was to re-visit the area of copper and cerium containing catalysts for use in the methanol industry. The goals were not only to prepare more robust copper/cerium catalysts, but also to further investigate the species that contributed to the high acti…
The catalytic hydrogenation of nitrobenzene is an industrially important reaction used in the commercial production of aniline for use in the polyurethane industry. A mechanism for the reaction was first proposed by Haber in 1898 and has been widely accepted despite never being …
Macromonomers of a range of functional methacrylate monomers are prepared using a catalytic chain transfer agent. The lower molecular weight oligomers, e.g. dimer, trimer, are isolated by reduced pressure distillation and characterised by IR and *H and 13C NMR spectroscopy. It h…
Organic chemistry teaching involves the explanation of most phenomena in terms of atomic and molecular models. The main challenge for the student is the creation of mental three-dimensional images of molecules. Unfortunately, many students find the visualisation of the spatial a…
The object of this work was to prepare some polyurethanes which contained phosphorus and to observe the major features of their thermal degradation. If the mechanism of thermal degradation was revealed some fundamental reasons for the flame retardant properties of phosphorus mig…
Vanadium disilicide (VSi2) has been studied as a model with a view to evaluation disilicides as high temperature structural materials. The homogeneity range and phase boundaries of VSi2-x have been determined. Evidence has been obtained for the existence of a "new" phase in the …
The reactivity of a novel magnesium alkyl reduced Ziegler catalyst system, has been studied in the preparation of various homopolymers and copolymers. Many of the earlier experiments were based upon the use of ethylene monomer as the major component of the polymorisation system.…
The aim of this work was to assess the viability andlimitations of certain reactions of the tetracarbony1coba1tate (1-)anion with organic halides as steps in some synthetic pathways.Primarily, the work was concerned with attempts to extend theformation of dia1kyl ketones from al…
The crystallographic structure of vanadium carbide having a carbon-to-metal atom ratio close to 0.83 has been determined from electron diffraction and nuclear magnetic resonance (NMR) studies. Material of this composition occurs within the nominally cubic (rocksalt) phase field …
The work of this thesis focuses on three perovskite-based compounds: YSr2Cu3−xCoxO7+δ cuprates, Gd2BaCo2O5+δ related phases and Sr2SnO4 Ruddlesden-Popper structures. Both YSr2Cu3−xCoxO7+δ and Gd2BaCo2O5+δ are cathode material candidates for solid oxide fuel cells (SOFCs). Doping…