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Articles 1 - 6 of 6
Full-Text Articles in Chemistry
On Metal Synthesis Of Some Substituted Rhenium And Manganese Complexes, Jaron Michael Thomas
On Metal Synthesis Of Some Substituted Rhenium And Manganese Complexes, Jaron Michael Thomas
Masters Theses & Specialist Projects
Heterocyclic organic and organometallic compounds (i.e. polypyrrole), and their derivatives, have been of great interest for conductive polymers due to their novel properties and environmental stability as compared to their non-aromatic analogs (i.e. polyacetylene). Our current interest focus upon the potential role of metal ligand bound pyridazines as the next generation of electronic devices that utilize the metal ligands bound to organics as the semiconducting material. Pyridazine is a 6-membered aromatic ring with two adjacent nitrogen atoms. These are promising candidates for a variety of materials and commercial applications; but they are difficult to get a metal ligand to fuse …
Section Abstracts: Chemistry
Virginia Journal of Science
Abstracts of the Chemistry Section for the 90th Annual Meeting of the Virginia Academy of Science, May 23-25, 2012, Norfolk State University, Norfolk, Virginia.
Synthesis And Characterization Of Linear And Branched Polylactic Acid For Use In Food Packaging Applications, Kyle C. Bentz
Synthesis And Characterization Of Linear And Branched Polylactic Acid For Use In Food Packaging Applications, Kyle C. Bentz
Kyle C Bentz
Polylactic acid (PLA) resins of various molecular weights and molecular weight distributions were synthesized. Linear, narrow molecular weight distribution (MWD) PLA resins were synthesized, as well as resins containing both high molecular weight branched structures and low molecular weight chains and oligomers. Narrow MWD resins were synthesized for use as adhesives for corrugated paperboard and broad MWD resins were synthesized for use as a waterborne coating. PLA resins were dispersed for use as a waterborne coating. Success has been made at forming films utilizing various plasticizers and surfactants as well as polyvinyl alcohol as dispersing agents. A cold dispersion procedure …
Photochemistry And Applications Of Diels-Alder Adducts And Photoacids In Materials Science, Valentine Johns
Photochemistry And Applications Of Diels-Alder Adducts And Photoacids In Materials Science, Valentine Johns
Electronic Theses and Dissertations
In chapter I Photo-retro-Diels-Alder (PrDA) reactions of a variety of Diels Alder (DA) adducts were studied. Experimental results showed that the photoreactivity (quantum yield) depends on the electron-donating ability of the diene component and the electronwithdrawing ability of the dienophile component. The mechanism was studied by trapping the reaction intermediate, O2 quenching and femtosecond time-resolved absorption spectroscopy. All the results support a mechanism that involves a charge-separated intermediate generated from a singlet excited state. The PrDA reaction may find applications in photoresponsive materials, photolithography, drug delivery and mechanistic research. Chapter II shows two applications of the PrDA reaction. The first, …
Polymers Used In Medicine: Common Types And Benefits Of Drug Delivery Systems, Camille Andrews
Polymers Used In Medicine: Common Types And Benefits Of Drug Delivery Systems, Camille Andrews
Natural Sciences Student Research Presentations
This poster describes the common types and benefits of drug delivery systems.
Novel Solid State Properties Of Drugs, Polymers And Various Chemicals By Thermal And Analytical Techniques, Dhruthiman R. Mantheni
Novel Solid State Properties Of Drugs, Polymers And Various Chemicals By Thermal And Analytical Techniques, Dhruthiman R. Mantheni
ETD Archive
I have observed unique variations in AC electrical conductivity of solids by dielectric analysis (DEA or DETA) when studied with respect to temperature and frequency. A wide range of solids were examined for this study e.g. organics, polymers, carbohydrates, API's (active pharmacy ingredients) and amino acids. Experimental results clearly show novel dielectric behavior of a linear increase in a log ionic conductivity vs. temperature in the pre-melt (20 to 30oC below the melt temperature) and melt transition regions. We have differentiated the solids which show the conductivity variations in pre-melt from those which do not e.g. pre-melt conductivity variations observed …