Chemistry Commons^™

Perfluoroalkyl (Aryl) Sulfonimide Zwitterions, Hua Mei

All Dissertations

This research focuses on superacid perfluoroalkyl(aryl) sulfonimides and their derivatives as a source of stable zwitterionic salts. The strong resonance stabilization of sulfonimides imparts unexpected stability to the zwitterions.
Two types of zwitterions were investigated. The first are symmetrical diaryliodonium zwitterions (DZs) as potential photo acid generators (PAGs) for microlithography. Driven by the demand for smaller feature sizes in the microelectronics industry, microlithography using shorter wavelength light has evolved and new PAGs are of interest. New DZs are potentially useful because they have good thermal stability and may be structurally modified to alter their spectral absorption characteristics. As an extension …

Production Of Ethanol From Hardwood, Jay Mitchell

Electronic Theses and Dissertations

Diminishing crude oil and natural gas supplies, along with concern about greenhouse gas are major driving forces in the search for efficient renewable energy sources. The conversion of lignocellulosic biomass to energy and useful chemicals is a component of the solution. Ethanol is most commonly produced by enzymatic hydrolysis of complex carbohydrates to simple sugars followed by fermentation using yeast.

C₆H_l0O₅ + H₂O −Enxymes→ C₆H₁₂O₆ −Yeast→ 2CH₃CH₂OH + 2C0₂

In the U.S. corn is the primary starting raw material for commercial ethanol production. …

Synthesis Of Aspernigrin A, Erica Joerger

Undergraduate Theses and Capstone Projects

Aspernigrin A is a compound correlated with inhibiting the growth of cancer cells in the colon. A five-step synthesis was designed for aspernigrin A, projected to yield four intermediates and the final product. The intermediates were analyzed by high field 1HNMR and FT-IR spectroscopy before proceeding to the next step. A model pyridone ring system was successfully prepared from a commercially available pyrone precursor in two steps. These results provide a proof of concept that the synthetic scheme should successfully yield the natural product.

Scanning Probe Microscopy And Oxidation Of Silicon At Breakdown Voltages, Thabo Gcwabaza

Theses, Dissertations and Capstones

The growing importance of Scanning Probe Microscopy (SPM) as a tool for nanofabrication is opening many avenues in lithography nano-science. One type of Scanning Probe Lithography involves electrochemistry at the tip/substrate interface. Atomic Force Microscopy (AFM) with conductive tips and substrates was used in our study to both pattern and image those patterns on silicon substrates. Our long-term objective is to design and fabricate micron-scale patterns of nanometer sized spots on silicon chips that can serve as attachment sites for DNA based nano-arrays. In order to fabricate such substrates a study of the underlying electrochemistry was required. A most promising …

Peroxynitrite Oxidation Of Aromatic Thiols: Characterization Of The Products Formed Through Oxidation Of Thionitrobenzoic Acid And Thionitropyridine By Peroxynitrite, Catherine Balchunas Mall

Dissertations, Theses, and Masters Projects

No abstract provided.

Nanodot-Based Organic Memory Devices, Zhengchun Liu

Doctoral Dissertations

In this study, resistor-type, diode-type, and transistor-type organic memory devices were investigated, aiming at the low-cost plastic integrated circuit applications. A series of solution-processing techniques including spin-coating, inkjet printing, and self-assembly were employed to fabricate these devices.

The organic resistive memory device is based on a novel molecular complex film composed of tetracyanoquinodimethane (TCNQ) and a soluble methanofullerene derivative [6,6]-phenyl C61-butyric acid methyl ester (PCBM). It has an Al/molecules/Al sandwich structure. The molecular layer was formed by spin-coating technique instead of expensive vacuum deposition method. The current-voltage characteristics show that the device switches from the initial 'low' conduction state to …

Synthesis Of Glycosylamides And Carbohydrate Fused Heterocycles, Michael De Castro

Seton Hall University Dissertations and Theses (ETDs)

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