Division of Chemical Sciences: Recent submissions
Now showing items 921-940 of 954
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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. ... -
Towards The Total Synthesis Of Terpenoid Natural Products
(2007-09-05)The construction of diverse molecular architecture conceived and created by Nature, continues to be the most exiting and challenging task to the practitioners of organic synthesis. As a result of refinement in isolation ... -
Ruthenium Complexes Of Chiral And Achiral Phosphorus Ligands Based On The P-N-P Motif
(2007-09-05)In recent years there is an increasing awareness of the importance of chiral phosphorus ligands in transition metal organometallic chemistry because of the utility of such complexes in homogeneous catalytic reactions. This ... -
Influence Of The Bite Angles Of Chelating Diphosphine Ligands In The Chemistry Of Ruthenium Hydride And Dihydrogen Complexes
(Indian Institute of Science, 2007-06-22)The bite angle of a diphosphine ligand plays an important role in determining the reactivity of a transition metal complex. The coordinated dihydrogen on a transition metal center can be activated toward homolysis or ... -
Slow Dynamics In Soft Condensed Matter : From Supercooled Liquids To Thermotropic Liquid Crystals
(Indian Institute of Science, 2007-06-20)This thesis, which contains fourteen chapters in two parts, presents theoretical and computer simulation studies of dynamics in supercooled liquids and thermotropic liquid crystals. These two apparently diverse physical ... -
Layered Oxides And Phosphates Of Bismuth: New Structural Types And Related Properties
(Indian Institute of Science, 2007-05-22)The thesis entitled "Layered Oxides and Phosphates of Bismuth: New Structural Types and Related Properties" consists of three parts and six chapters. It begins with an introductory note providing a brief overview of the ... -
One-Pot Synthesis Of Chiral Disulfides & Diselenides From α-Amino Acids Mediated By Ammonium Tetrathiomolybdate In Water
(Indian Institute of Science, 2007-03-27)We have described herein a convenient one-pot synthesis of lisulfides/diselenides from a-amino acids mediated by ammonium etrathiomolybdate in water. (Figure 1) (Figure) Figure 1 Transformation of α-amino acids ... -
Synthesis And Investigation Of Transition Metal Oxides Towards Realization Of Novel Materials Properties
(Indian Institute of Science, 2007-03-23)Transition metal compounds, especially the oxides, containing dn (0 ≤ n ≤ 10) electronic configuration, constitute the backbone of solid state/materials chemistry aimed at realization of novel materials properties of ... -
Design And Synthesis Of Novel Interacalator Based Chemical Nuclease
(Indian Institute of Science, 2007-03-08)Deoxyribonucleic acid and ribonucleic acid under physiological condition are polyanions composed of heterocyclic bases linked through sugar phosphate backbone. Due to Watson-Crick base pairing, DNA exists in double-helical ... -
Diffusion In Porous Solids : Void Disorder, Orientation And Rotation, Reaction And Separation, And Levitation Effect
(Indian Institute of Science, 2006-12-12)Diffusion in bulk has been well studied and our understanding may be said to be adequate if not complete. Similarly, surface diffusion has been investigated by a number of workers and a fair understanding of it has emerged. ... -
Synthesis Of Carbasugars And Other Related Structural Motifs
(Indian Institute of Science, 2006-12-11)Recent years have witnessed a great deal of interest in the design and synthesis of small molecules, which can mimic complex carbohydrates of vital importance in various life processes. Carbasugars constitute one such class ... -
Computational Studies On Some Plausible Structures Of The Hydrides And Oxyhydrides Of [36-D6h] Fullerene
(Indian Institute of Science, 2006-11-23)Fullerenes, the highly symmetric molecular carbon clusters, have been in the limelight of scientific research since their discovery by Kroto and coworkers [1]. The focus of experimental and theoretical studies has centered ... -
Thin Films And Sub-Micron Powders Of Complex Metal Oxides Prepared By Nebulized Spray Pyrolysis And Brillouin Scattering Investigations Of Phase Transitions In Solids
(Indian Institute of Science, 2006-06-22)The thesis consists of two parts. Part 1 deals with the preparation of thin films and sub-micron powders of complex metal oxides by nebulized spray pyrolysis (NSP) and Part 2 consists of Brillouin scattering studies of ... -
Semiconductor Photocatalysts For The Detoxification Of Water Pollutants
(Indian Institute of Science, 2006-06-15)Water pollution is a major concern in vast countries such as India and other developing nations. Several methods of water purification have been practiced since many decades, Semiconductor photocatalysis is a promising ... -
In-Situ Synthesis Of A12O3_ZrO2_SiCw Ceramic Matrix Composites By Carbothermal Reduction Of Natural Silicates
(Indian Institute of Science, 2006-06-14)This thesis outlines the work done on in-situ synthesis of Al2O3-ZrO2-SiCw ceramic composites and their property evaluation. The introductory chapter deals with the literature survey on ceramic matrix composites, properties ... -
Dynamical Approach To The Protevin-Le Chatelier Effect
(Indian Institute of Science, 2006-06-07)Materials when subjected to deformation exhibit unstable plastic flow beyond the elastic limit. In certain range of temperature and strain rates many solid state solutions, both interstitial as well as substitutional, ...