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Chemical Transformations Of Arylsulfonamide Molecular Crystals, Rajan Giri
Chemical Transformations Of Arylsulfonamide Molecular Crystals, Rajan Giri
Masters Theses
The pursuit of chemical specificity and efficiency of chemical reaction in molecular crystals has attracted considerable attention over the last decade. The successful control of molecular alignment prior to such transformations continues to provide opportunities for near quantitative yields of new materials. This thesis reports the predictable self-assembly of aryl sulfonamide materials constructed from cinnamic acid and phenylpentadienoic acid fragments capable of forming supramolecular dimers that undergo unique photocyclization reactions. Use of racemic and enantiopure single-component building-blocks provides access to enantiocontrolled [2+2] photodimerized products.
Solid-state reaction precursors were prepared using conventional solution-based synthetic organic techniques. Component chirality (racemic or homochiral) …
Studies Of The Structural Boundaries Of Solid-State Photodimerization Reactions Via Isocoumarins And Heteromeric Assemblies, Mihiri S. Weerasinghe
Studies Of The Structural Boundaries Of Solid-State Photodimerization Reactions Via Isocoumarins And Heteromeric Assemblies, Mihiri S. Weerasinghe
Masters Theses
The study of molecules in crystals has gained considerable attention in the field of structural chemistry. Much interest has focused on the use of molecular crystals for the construction of materials with specific functional properties. Because the design of such materials requires a critical understanding of intermolecular interactions, use of the building-block approach continues to offer an important strategy to multimolecular frameworks. Though the use of template and metal-ligand interactions has provided successful opportunities to organize chemical reactions in solids, these methods require secondary molecules and are limited to achiral starting materials. As such, exploring chiral synthesis with simplified precursors …
Determination Of Structural Stabilities Of Metal-Free Porphyrin Cytochrome C, Zinc Cytochrome C, And Cobalt Cytochrome C, Usha K. Tottempudi
Determination Of Structural Stabilities Of Metal-Free Porphyrin Cytochrome C, Zinc Cytochrome C, And Cobalt Cytochrome C, Usha K. Tottempudi
Masters Theses
No abstract provided.
Crystal Structures Of Metal Sulfonates, Jon Lyle Obrecht
Crystal Structures Of Metal Sulfonates, Jon Lyle Obrecht
Masters Theses
Designing new materials with predictable chemical and physical properties has long been a goal of synthetic chemists. The functional properties of molecular compounds are intimately tied to the underlying chemical framework. In addition to atom selection and chemical connectivity, the spatial organization of the molecules often contributes to the function of materials. Because crystals are constructed of periodic arrays of components (i.e. atoms or molecules) with structures easily assessed via X-ray diffraction, crystalline materials offer ideal candidates to explore the relationship of component selection and crystal packing to material property.
One such property that has been extensively examined by …
From Half-Rotaxanes To Poly-Rotaxane Architectures, Heather Renee Schoonover
From Half-Rotaxanes To Poly-Rotaxane Architectures, Heather Renee Schoonover
Masters Theses
The host-guest abilities of macrocyclic compounds made them important players in the field of supramolecular chemistry, especially those studying mechanical bonds. Rotaxanes and catenanes are among the most well-known examples of mechanically interlocked molecules. Our approach in the synthesis of poly-rotaxane systems involves the preparation of pseudorotaxanes with donor capabilities and then use metallic centers to assemble the poly-rotaxane architectures.
A pyridine-based half-rotaxane has been synthesized and the subsequent solution studies revealed a large association constant. 1H-NMR studies show that these interlocked species exhibit a slow exchange on the NMR timescale. Using the single point method and VT-NMR several …
The Effect Of Electrochemical Modification On The Surface Topography And Chemical Make-Up Of Strontium Titanate, Kelly J. Harmon
The Effect Of Electrochemical Modification On The Surface Topography And Chemical Make-Up Of Strontium Titanate, Kelly J. Harmon
Masters Theses
Previous research into the oxidation and reduction of strontium titanate and the changes that result from this has been carried out. The oxidation and reduction of strontium titanate at high temperatures and high pressures has been investigated for the effect that it has upon the surface topography of strontium titanate and the chemical makeup of the strontium titanate. Research into the electrochemical oxidation of perovskites, similar in structure to that of strontium titanate, have even provided evidence pointing to the identity of the oxygen species being incorporated into the strontium titanate.
This research seeks to investigate what changes occur to …
The Effects Of Chemical Treatment And Light Exposure On Pah Concentrations In Biochar, Fathima Nadheesha Muhammed Khalid
The Effects Of Chemical Treatment And Light Exposure On Pah Concentrations In Biochar, Fathima Nadheesha Muhammed Khalid
Masters Theses
A series of experiments quantifying extractable polycyclic aromatic hydrocarbons (PAHs) in biochar before and after various treatments were conducted. The analytical approach included solvent extraction of PAHs with toluene, further isolation and column cleanup before gas chromatography mass spectroscopy (GC-MS) analysis. The treatment methods include exposing biochar samples to sunlight and UV radiation with and without additives and reacting with hydrogen peroxide.
Two biochar samples from the Eastern Illinois University bench-type gasifier and commercial biochar were analyzed. Analyzing of three biochar types revealed that plant biochar has lower total PAH concentration than wood (W) biochar or wood and plant (giant …