Division of Chemical Sciences: Recent submissions
Now showing items 921-940 of 969
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Multilayers And Artificial Superlattices Of Lead Magnesium Niobate-Lead Titanate Based Relaxors
(2009-03-05)The present research work mainly focuses on fabrication of compositionally modulated multilayers of (l−x) Pb(Mgi/3N2/3)O3 - x PbTiO3 (PMNPT) through multi target pulsed laser ablation technique. Heterostructures like ... -
Growth Kinetics And Electronic Properties Of Semiconducting Nanocrystals In The Quantum Confined Regime
(2009-03-04)Properties of nanocrystals are extremely sensitive to their sizes when their sizes are smaller or of the order of the excitonic diameter due to the quantum confinement effect. The interest in this field has been concentrated ... -
Dielectric Titanate Ceramics : Contributions From Uncommon Substituents And Microstructural Modifications
(2009-03-02)This thesis deals with the investigations on the dielectric properties of polycrystalline ceramics having uncommon substitutions in barium titanate and other related phases of BaTiO3-CaTiO3, MgTiO3-CaTiO3 and MgTiO3-BaTiO3 ... -
Ireland-Claisen Rearrangement Based Strategy To Sesquiterpenes Containing Vicinal Quaternary Carbon Atoms
(2009-03-02)Among Nature's creation, terpenoids are more versatile and exciting natural products. In a remarkable display of synthetic ingenuity and creativity, nature has endowed terpenes with a bewildering array of carbocyclic ... -
A Total Synthesis Of Novel Sesquiterpenoid Natural Product ( ±)-Merrilactone A And A Study Of π-Face Selectivity In Additions To Trigonal Carbon Centers In Iso-Steric Environments
(2008-10-14)Natural product synthesis has been a most exciting and challenging branch of organic chemistry in view of its creative power and unlimited scope. Natural product synthesis witnessed an unprecedented growth and innovative ... -
Theoretical Investigations On A Few Biomolecular Rate Processes
(2008-10-14)Traditional topics such as physics, chemistry and mathematics have immensely changed the world in the twentieth century, but the twenty-first century seems to be that of soft condensed matter physics, which has already ... -
Investigations Of Open-Framework Metal Carboxylates, Sulfates And Related Materials
(2008-10-13)Open-framework materials constitute an important area of study in materials chemistry, because of their potential applications in areas such as sorption and catalysis. Furthermore, these materials exhibit fascinating ... -
Quadratic Nonlinearity In Covalently And Non-Covalently Linked Molecules In Solution
(2008-10-01)This thesis deals with the investigation of the first hyperpolarizabilities (β) of a large number of molecules linked to other molecules either covalently or noncovalently. Chapter 1 gives a brief introduction to ... -
Organically-Templated Open-Framework And Hybrid Materials
(2008-01-25)Open-framework inorganic and inorganic-organic hybrid materials constitute an important area of study in materials chemistry, because of their potential applications in areas such as sorption and catalysis. Besides ... -
Chemistry Of Thio And Seleno Metallates In Organic Synthesis
(2007-12-29)Thio metallates are known for many years for their utility in many processes. They have been established as versatile reagents in organic synthesis. However the heavier metal chalcogenides, though known for many years, ... -
Charge-Transfer Associated Photoluminescence Of Rare-Earths Doped Oxide Phosphors
(2007-12-29)Luminescent materials can be found in a broad range of everyday applications. While in the seventies and eighties, the field of luminescent materials seemed to be fairly well covered, research in nineties has been revitalized ... -
Molecular Expression Through Fluorescence: Studies In Probe Design And Aggregation
(2007-12-29)The present thesis entitled, "Molecular expression through fluorescence: Studies in probe design and aggregation" describes very simple bi-functional donor-acceptor poly-aromatic fluorophores that have been shown to possess ... -
Synthesis Of Sesquiterpenes Containing Two Vicinal Quaternary Carbon Atoms
(2007-12-27)Among nature's creation, terpenoids are more versatile and exciting natural products. In a remarkable display of synthetic ingenuity and creativity, nature has endowed terpenes, more so sesquiterpenes, with a bewildering ... -
Molecular Modulation Of Material Properties: Studies On Nanoparticles, Nanoassemblies, And Low Molecular-Mass Gelator
(2007-11-19)The present thesis titled “Molecular Modulation of Material Properties: Stud- ies on Nanoparticles, Nanoassemblies and Low Molecular Mass Gelator” deals with the preparation, characterization, and investigations into the ... -
Studies On Electrode Materials For Lithium-Ion Batteries
(2007-11-16)In the early 1970s, research carried out on rechargeable lithium batteries at the Exxon Laboratories in the US established that lithium ions can be intercalated electrochemically into certain layered transition-metal ... -
Investigation Of A Novel Class Of Conducting Polyaniline And Related Systems
(2007-10-25)The interest in conjugated polymers has been two-fold. A rich variety of intriguing physical phenomena, combined with its immense technological implications in the area of molecular electronics, sensors etc. has inspired ... -
Chemical Characterisation Of The Surfaces And Interfaces Of Barium Titanate And Related Electronic Ceramics
(2007-10-25)This thesis deals with the investigations on the atomic composition, chemical surface states and microstructural features of barium titanate and other electronic ceramics namely barium polytitantes, calcium manganites and ... -
Transport And Noise In GaAs-Based Devices
(2007-10-23)The objective of this work was to study the noise in semiconductors and relate the transport mechanisms in the devices with the noise from the devices. The main part of the work was to set up a system for the measurement ... -
Perovskite Related Oxides: Development Of New Synthetic Methods, Materials And Properties
(2007-10-06)Oxides of ABO3 composition (A = alkali, alkaline earth or rare earth metal in general, B = transition metal) constitute a large family of metal oxides of current interest to solid state and materials chemistry. Among the ... -
Molecular Simulations Of Temperature Induced Disorder And Pressure Induced Ordering In Organic Molecular Crystals
(2007-09-05)Crystallographically solids with well defined crystal structures are normally assumed to be highly ordered. However, it is not uncommon to find considerable degree of disorder amongst many of these crystalline substances. ...