Division of Chemical Sciences: Recent submissions
Now showing items 281-300 of 1275
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Studies in structural chemistry - Dipole moments in relation to molecular structure
The dipole moments of p-chlorophenyldichlorophosphine (2.28 D) and p-bromophenyldichlorophosphine (2.04 D) have been determined in benzene at 35 °C. Applying the method of Smith et al., the formal charge distribution in ... -
Potentiometric and spectrometric investigations of cobalt (II) - Ethanolamine (mono, di and tri) complexes
A detailed potentiometric and spectrophotometric investigation of cobalt-ethanolamine (mono-, di- and tri-) complexes has been made. Potentiometric investigations have been carried out at various metal ion concentrations ... -
Oxidation reduction studies in non-aqeous media
This thesis embodies the results of the investigations on the oxidation-reduction behaviour of two typical redox couples in non~aqueous media. The redox systems chosen for the studies are (i) Copper(II) - Copper(l) ... -
Studies in solid state chemistry : Polymorphic transformations of titanium dioxide
The kinetics and energetics of the transformation of pure anatase (tetragonal) to rutile (tetragonal) have been studied. The rate data fit a first-order rate equation, and the activation energy is approximately 90 kcal·mol?¹. ... -
Studies in phase rule
A brief introduction to the subject of heterogeneous salt systems has been given in Chapter I of the thesis, with particular reference to those involving two salts possessing a common ion, in and without the presence of ... -
Molecular conformation and electronic structure of compounds related to amides & thioamides - a study by ab initio & semiemperical molecular orbital methods
The molecular conformation of amide derivatives is of paramount importance in understanding the factors which govern the conformations of peptides and proteins. A study of the barriers to internal rotation aids in ... -
Basic studies on electromechanical power sources - Voltage transients, alternating current impedance and steady state discharge characteristics of magnesium-manganese dioxide dry cells and supplementary investigation on titanium-substrate cobalt oxide and magnetite anode development for electrosynthesis
The extended shelf life of high-energy primary batteries based on lithium, magnesium, and aluminum is primarily attributed to the presence of a protective passive film on the surface of the reactive metal anode. Evaluating ... -
Low-temperature preparatioin and characterization of the perovskite lanthanide chromites and related oxides
The thermal decomposition of lanthanum biscitrato chromate(III) dihydrate was investigated in both static air and flowing argon atmospheres. The complex decomposes in four distinct steps, forming oxycarbonate and ... -
Electrochemical studies of sealed lead-acid battery electrode reactions
Sealed lead-acid battery (SLA), also called valve-regulated lead-acid battery (VRLA), is the subject of considerable research efforts at the present time. There are, however, a few outstanding problems to be solved to ... -
Dynamics of bond-formation in some diatomics
An understanding of molecular formation from the separated atoms is one of the important goals in quantum chemistry. Earlier interpretations of the bond formation are based on the spatial characteristics of the charge ... -
Microscopic modelling of absorption of dipoles in electrical double layer
(i) A three-state model allowing two orientational states for the solvent and one for the organic adsorbate is analysed to obtain the adsorption isotherm. The approximations under which pseudo Frumkin isotherm can arise ... -
Metal-silicate fractionation in the primitive solar nebula: a computational study of the role of f(O2), P, T and charged species
This thesis embodies the results of computational studies of the physico-chemical conditions associated with the condensation of high-temperature phases within the primitive solar nebula. The focus of these studies is on ... -
Theoretical studies on models for organic ferromagnetism
The thesis examines the three models in existence which predict ferromagnetism in purely organic systems. These models are (i) Mataga-Ovchinnikov model which predicts high-spin ground state in alternant polymers with ... -
Exploring Single-Chain Collapse Transition in Periodically Grafted Amphiphilic Polymers
Synthetic polymers that emulate the complexity and responsiveness of biological macromolecules are at the forefront of modern materials research. One challenge in this field is to design polymer systems that can fold or ... -
Synthesis and Self-Assembly Studies of Carbohydrate-Conjugated Oligo-p-Phenylenes
The structural diversity of carbohydrate derivatives is amplified further by their strong tendency to self-assemble in aq. solutions, provided the molecular constitution and environmental conditions favor. Glycostructures ... -
Studies on the Lewis Acidity of Redox-Active Telluranes and the Catalytic Applications of a Low-Valent Iron Complex
Recent advances in catalysis have expanded the landscape of both main group and transition metal catalysts, moving beyond traditional boron- and aluminum-based main group systems and 2nd -3rd row transition metal systems ... -
Theoretical Investigations of Excited State Proton Transfer in Selected Molecular Systems
Excited state proton transfer (ESPT) plays a key role in various chemical and biological systems, including DNA where it plays a role in the deactivation mechanism. Compared to the ground state, molecules typically have ... -
Exploring Scalable Material Strategies Towards the Practical Metal-Sulfur Batteries
Lithium-ion batteries (LIBs) dominate the market of portable electronic devices and currently serve as the stand-alone power source for electric vehicles. LiBs are approaching their theoretical energy density limit, ... -
Guest Induced Structural Transformations of Coordination Cages and their Role in Mediating Chemical Conversions
Enzymes utilize several non-covalent interactions to perform catalytic reactions within small cavities. Coordination driven self-assembly has been found to be the simplest approach for constructing artificial enzyme ... -
Design and development of proteasome inhibitors with improved efficacy in breast cancer cells: 3D tissue models and detailed molecular mechanistic studies
The proteasome is an enzyme complex that regulates the degradation of intracellular proteins, maintaining cell cycle regulation, protein quality, and cellular homeostasis. Proteasome inhibition has gained popularity as a ...