Browsing Chemistry by Title
Now showing items 645-664 of 842
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Semiquinone-Bridged bis-Dithiazolyls as Neutral Radical Conductors
(University of Waterloo, 2011-12-21)Radicals are potential building blocks to prepare conductive and magnetic materials. In order to achieve high conductivity, materials displaying a large bandwidth W and a low on-site Coulomb repulsion energy U must be ... -
Sensing Parts-per-Trillion Cd2+, Hg2+ and Pb2+ Collectively and Individually Using Phosphorothioate DNAzymes
(American Chemical Society, 2014-05-22)Cadmium, mercury, and lead are collectively banned by many countries and regions in electronic devices due to their extremely high toxicity. To date, no sensing method can detect them as a group and also individually with ... -
Separating and probing tautomers of protonated nucleobases using differential mobility spectrometry
(Elsevier, 2017-08-26)The protonated nucleobases (C+H)+, (T+H)+, (U+H)+, (A+H)+, and (G+H)+ are investigated in a combined experimental and computational study using differential mobility spectrometry (DMS), mass spectrometry, and electronic ... -
SHORT CHIRAL SYNTHESES OF MORPHINAN AND RELATED SYSTEMS
(University of Waterloo, 2008-02-20)Morphine and its derivatives continue to challenge the creativity of synthetic chemists. The aim of this research is to execute a short chiral synthesis of the morphinan system. Chirality is introduced via asymmetric ... -
Silicon-based Materials as Negative Electrodes for Li-ion Batteries
(University of Waterloo, 2014-05-02)Silicon is a promising negative electrode material for lithium-ion (Li-ion) batteries, with volumetric and gravimetric capacities much higher than those in current commercial batteries. Implementation of Si as a negative ... -
A Silver DNAzyme
(American Chemical Society, 2016-04-05)Silver is a very common heavy metal, and its detection is of significant analytical importance. DNAzymes are DNA-based catalysts; they typically recruit divalent and trivalent metal ions for catalysis. Herein, we report a ... -
Single White-Light-Emitting Nanostructures Based on Förster Resonance Energy Transfer: Development, Characterization and Applications
(University of Waterloo, 2015-01-19)Electric energy use associated with lighting reaches up to 3400 Terawatts hours and constitutes approximately 20 % of the world total electricity output per year. That in turn contributes to the release of at least 1900 ... -
Site Specific Surface Chemistry of Prototypical Amino Acid, Peptide and DNA Base Groups on Si(111)7x7
(University of Waterloo, 2012-04-24)The surface chemistry of glycine, glycylglycine, adenine and thymine on Si(111)7×7 are studied for the first time by X-ray photoelectron spectroscopy (XPS) and Scanning Tunneling Microscopy (STM) experimental techniques. ... -
Site-specific Chemistry of Sulfur-containing Amino Acids on Si(111)-√3×√3-Ag: Bioorganic Nanostructured Film Growth and Adsorbate-induced Metal Cluster Formation Governed by Surface Defects
(University of Waterloo, 2019-09-24)The interfacial interactions and film growth mechanisms of sulfur-containing amino acids on Si(111)-√3×√3-Ag are investigated by using x-ray photoelectron spectroscopy (XPS) and scanning tunneling microscopy (STM) at room ... -
Size-Specific ZrO₂ and HfₓZr₁₋ₓO₂ Nanoclusters and Their Magnetic and Nanodevice Applications
(University of Waterloo, 2024-01-22)Nanoclusters, generally defined as assemblies of a discrete number of atoms or molecules in the size range of 1-10 nm, have attracted a lot of attention due to their unique properties that bridge the gap between isolated ... -
Smart Polymeric Materials by Ring-Opening Metathesis Polymerization
(University of Waterloo, 2017-09-22)The aim of this Thesis work was to address the issue of microbial contamination inside fuel tanks. Microorganisms induce the chemical corrosion of airplane tank walls due to their production of organic acids. Biocide ... -
Solid Phase Microextraction as a Sample Preparation Tool for Targeted and Untargeted Analysis of Biological Matrices
(University of Waterloo, 2017-09-27)Successful determination of small molecules in complex biological systems requires implementation of robust analytical methodologies able to provide reliable information in a cost-effective and efficient manner. Solid phase ... -
Solid phase microextraction coupled to comprehensive two-dimensional gas chromatography–time-of-flight mass spectrometry for metabolite profiling of apples: Potential of non-invasive in vivo sampling assay in characterization of metabolome
(University of Waterloo, 2012-09-21)The objective of the current research project relies on implementation of solvent-free, green and environmentally friendly solid phase microextraction (SPME) sample preparation alternative in the area of complex sample ... -
Solid Phase Microextraction Devices Prepared on Plastic Support as Potential Single-Use Samplers for Bioanalytical Applications
(American Chemical Society, 2015-09-04)This study presents new thin-film solid phase microextraction (SPME) devices prepared on plastic as potential single-use samplers for bioanalysis. Polybutylene terephthalate (PBT) was selected as a support due to its ... -
Solid phase microextraction for in vivo determination of pharmaceuticals in fish and wastewater
(University of Waterloo, 2012-10-26)This thesis describes the development and application of solid phase microextraction (SPME) as a sample preparation technique for in vivo determination of pharmaceutical residues in fish tissue and wastewater. The occurrence, ... -
Solid Phase Microextraction in Aqueous Sample Analysis
(University of Waterloo, 2008-06-26)This thesis presents enhanced analytical methods developed for complex aqueous sample analysis based on solid phase microextraction (SPME). First, the laboratory evaluation of the kinetic calibration approach in aqueous ... -
Solid Phase Microextraction On-Fiber Derivatization Using a Stable, Portable, and Reusable Pentafluorophenyl Hydrazine Standard Gas Generating Vial
(American Chemical Society, 2017-07-05)Solid phase microextraction (SPME) on-fiber derivatization methods have facilitated the achievement of lower detection limits and targeted analysis of various substances that exhibit poor chromatographic behavior, thermal ... -
Solid phase microextraction: a versatile technique for lipid analysis
(University of Waterloo, 2023-04-26)Extensive multidisciplinary research and improvements to instrumentation and workflows are continuously enabling new insights into the role of lipids in health and disease. As with other metabolites, the accurate analysis ... -
Solid Solution Tetrelides and Pnictides for Thermoelectric Applications
(University of Waterloo, 2023-07-17)Recent major advancements in thermoelectric material performance center around the development and understanding of band structure engineering techniques and phonon scattering mechanisms. Solid solution materials have the ... -
Solid State Structures and Transport Properties of Selenazyl Radicals
(University of Waterloo, 2008-08-29)The synthetic routes to the salts of the 3H-naphtho[1,2-d][1,2,3]dithiazolylium cation and its three selenium containing variants are described. The most efficient approach involves the condensation of bis-acetylated ...