etd AT Indian Institute of Science: Recent submissions
Now showing items 261-280 of 8174
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Lanthanide and actinide complexes of diphosphazane dioxides and lanthanide complexes of amino acids and peptides
The chemistry of f-block elements is currently undergoing rapid developments, and a rich and diverse chemistry is emerging because of its various applications (e.g., MOCVD precursors, MRI contrast agents). In addition, ... -
Theoretical studies on hydrogen transfer reactions
The present analysis reveals the following features: (i) The calculated activation barriers via both configuration mixing approach (using equations 2.1–2.4) and quantum chemical methods (using MNDO/RHF/CI and AM1/RHF/CI) ... -
Novel reactions of copper (I) phenoxide with hetero-allenes: a synthetic and structural study.
In the present study several novel reactions of copper(I) phenoxide with small molecules like CS?, PhNCS, PhNCO and other heteroallenes have been investigated. The products have been characterised by spectroscopic techniques ... -
Low temperature synthesis & characterization of fine particle perovskite oxide & structurally rlated mixed metal oxides
This thesis concentrates on the precursor chemistry of simple and mixed metal carboxylates, especially the citrates and tartrates. The carboxylate process is simple, convenient and most efficient to synthesize fine powders ... -
Photoelectrochemistry of polycrystalline SrTiO3 and BaTiO3 semiconductor electrodes
This thesis deals with the investigations on the photoelectrochemistry and photoelectrolysis of water, making use of polycrystalline semiconductor electrodes of BaTiO? and SrTiO? with a view to understand the effect of ... -
Combustion synthesis and properties of ferroelectrics, relaxor ferroelectrics & microwave resonator materials
Dielectric materials include ferroelectrics, relaxor ferroelectrics and microwave resonators which are classified on the basis of their dielectric performances like dielectric constant, dielectric loss and piezoelectric ... -
Design of Structures and Mechanisms using Topological Derivatives and Exploration of 4D-printed Shape Morphing Structures
We employ topological derivatives to design supports for stiff structures and compliant mechanisms along with exploration of design features for 4D-printed shape-morphing structures. Topological derivative (TD) has been ... -
Understanding the physiological role of ITPK1-type inositol phosphate kinase in embryophytes
Land plants have evolved sophisticated mechanisms to adapt to phosphate (Pi) limitation, yet such regulatory networks in nonvascular bryophytes remain poorly understood. Here, we show that both male and female liverworts ... -
Frequency Comb-Based Seed Sources for High-Power Spectral Beam Combining
In recent years, the need for high-power laser systems has grown across multiple industries. Lasers with high output power and excellent beam quality are used in material processing and directed energy weapons for defense. ... -
Isonitroso-keto-imino Nicle (II) complexes-A study in ambidentate coordination.
In conclusion, it may be said that the isolation of the present complexes reveals the wider occurrence of linkage isomerism in isonitroso-p-keto-imine ligand complexes. These belong to the rare type of complexes where the ... -
Metal cxhelates in vinyl polymerisation
A general kinetic scheme for the polymerization of vinyl monomers, initiated by dipivaloyl methane chelates of ferric and cupric, was postulated in Chapter III. The results of the spectral investigation complementary to ... -
Studies on dialkyldithio-carbanate collectors with reference to sulphide minerals
These studies have shown that the dithiocarbamates are not oxidised either in solution or at the surfaces of sulphide minerals. Such an oxidation is not a prerequisite for the adsorption of these collectors at the sulphide ... -
Physico-chemical studies of vinyl polymers
The field of polymer science presents a number of problems for investigation both in the solid form and in solution. Of these, most interesting and important is the molecular weight, the size, and the shape of the polymer ... -
Understanding RNA-Metal Ion Interactions: RNA Folding Pathways and Ion Selectivity
Ribonucleic acid (RNA) plays diverse and critical roles in cellular function. For most biological functions, RNA must fold into specific three-dimensional structures, and physiologically abundant monovalent (Na+ and K+) ... -
Data-Driven Prediction of Concrete Behaviour and Performance Enhancement Through CO₂ Inclusion Techniques
Concrete remains the most widely used construction material globally, valued for its versatility, strength, and durability. However, the conventional approach to concrete mix design, governed by empirical codal provisions ... -
Nonreciprocity, condensation and chirality in active granular systems
We present a journey into the rich non-equilibrium phenomena of active granular systems, a versatile model for studying “living” materials. Our exploration begins with the discovery of non-reciprocal, medium-mediated ... -
Coupled vibro-acoustics of an unbaffled plate
In this work, that falls largely in the realm of applied mathematics, we consider a fluid-loaded finite simply-supported rectangular unbaffled plate with the following objectives: a) to derive a closed form mathematical ... -
High-precision Autonomous Flight and Soft-Landing of Multirotor UAVs with Terminal Attitude Constraints
With the rapid expansion of drone applications, UAVs are increasingly expected to operate in complex and dynamic environments such as landing on autonomous ground vehicles, moving ships, or mobile delivery platforms which ...