Browsing Chemistry by Title
Now showing items 817-836 of 839
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Towards a new implementation of ‘MREOM-CC’, with application to MO+ dimers (M = V, Cr, Mn, Fe, Co, Ni)
(University of Waterloo, 2018-01-24)Multi Reference Equation of Motion Coupled Cluster (MREOM-CC) is an electronic structure method that allows the calculation of many electronic states simultaneously. A sequence of transformations are ... -
Towards the Development of Thermoresponsive Starch Films
(University of Waterloo, 2018-05-22)Wound dressings are an important part of the global wound care market. In addition to having desirable physical properties such as flexibility and gas permeability, it is also important that they be easily removed. As ... -
Towards Understanding Differential Ion Mobility and its Applications for Analytical and Medicinal Chemistry
(University of Waterloo, 2023-08-30)This PhD thesis, titled “Towards Understanding Differential Ion Mobility Spectrometry and its Applications in Analytical and Medicinal Chemistry,” encompasses a broad effort to understand the principles that underpin ... -
Towards understanding of poly-guanine activated fluorescent silver nanoclusters
(Institute of Physics, 2014-03-18)It has been recently reported that the fluorescence of some DNA-templated silver nanoclusters (AgNCs) can be significantly enhanced upon by hybridizing with a partially complementary DNA containing a G-rich overhang near ... -
Tunable covalent organic framework electrochemiluminescence from non-electroluminescent monomers
(Elsevier, 2021-10)It is hard to find new electrochemiluminescence (ECL) luminophores using existing research strategies, especially from ECL non-active monomers. Here, fully conjugated covalent organic frameworks with trithiophene (BTT-COFs) ... -
Tuning Cation and Anion Redox Chemistry in Transition Metal Oxide Positive Electrode Materials for Lithium and Sodium-Ion Batteries
(University of Waterloo, 2021-03-31)The surging demand for electrified transportation (both ground and air), robots, and other battery-powered devices has driven the development of electrochemical energy storage systems that can provide high gravimetric/volumetric ... -
Two Pb2+-specific DNAzymes with opposite trends in split-site-dependent activity
(Royal Society of Chemistry, 2014-05-04)By splitting the catalytic core of DNAzymes into two halves, two Pb2+-specific DNAzymes retain partial activity, while they show opposite trends of activity as a function of the split site, revealing important nucleotides ... -
Two successive calcium-dependent transitions mediate membrane binding and oligomerization of daptomycin and the related antibiotic A54145
(Elsevier, 2016-09)Daptomycin and A54145 are homologous lipopeptide antibiotics that permeabilize the cell membranes of Gram-positive bacteria. Membrane permeabilization depends on the presence of both phosphatidylglycerol (PG) and calcium, ... -
Ultrafast Dynamical Studies of Two Dimensional Transition Metal Dichalcogenides
(University of Waterloo, 2022-08-22)Layer transition metal dichalcogenides (TMDCs) have attracted great attention due to their unique electronic and optical properties. Specifically, single-layer semiconducting TMDCs with their direct band gaps in the visible ... -
Ultrahigh Nanoparticle Stability against Salt, pH, and Solvent with Retained Surface Accessibility via Depletion Stabilization
(American Chemical Society, 2012-06-20)For many applications, it is desirable to stabilize colloids over a wide range of buffer conditions while still retaining surface accessibility for adsorption and reaction. Commonly used charge or steric stabilization ... -
An Ultrasensitive Light-up Cu2+ Biosensor Using a New DNAzyme Cleaving a Phosphorothioate-Modified Substrate
(American Chemical Society, 2017-01-15)Cu2+ is a very important metal ion in biology, environmental science, and industry. Developing biosensors for Cu2+ is a key topic in analytical chemistry. DNAzyme-based sensors are highly attractive:, for their excellent ... -
Ultrasonic assisted synthesis, crystallographic, spectroscopic studies and biological activity of three new Zn(II), Co(II) and Ni(II) thiosemicarbazone complexes as precursors for nano-metal oxides
(Elsevier, 2019-01-01)Using ultrasonic irradiations, three new complexes of type [ZnL2].CH3CN, [NiLCl] and [CoL2] (where L is 2-acetylpyridine-4N-p-chlorophenylthiosemicarbazone ligand) have been prepared and investigated using various spectroscopic ... -
Unravelling the factors that drive separation in differential mobility spectrometry: A case study of regioisomeric phosphatidylcholine adducts
(Elsevier, 2019-10)Differential mobility spectrometry (DMS) has shown promise as an analytical tool in the field of lipidomics. However, the underlying mechanism that drives DMS-based lipid separations is still somewhat unclear. Here, we ... -
Use of (Dihaloiodo)arene Reagents in Halogenation Reactions
(University of Waterloo, 2017-09-18)Halogenation of organic molecules is a fundamental transformation in organic chemistry. Introducing halogens into substrates can be a challenge since most methods for introducing fluorine or chlorine into molecules include ... -
Use of prospective and retrospective risk assessment methods that simplify chemical mixtures associated with treated domestic wastewater discharges
(Wiley, 2018-03-01)A framework is presented that is intended to facilitate the evaluation of potential aquatic ecological risks resulting from discharges of down-the-drain chemicals. A scenario is presented using representatives of many of ... -
Using differential mobility spectrometry to measure ion solvation: An examination of the roles of solvents and ionic structures in separating quinoline-based drugs
(Royal Society of Chemistry, 2015)Understanding the mechanisms and energetics of ion solvation is critical in many scientific areas. Here, we present a methodlogy for studying ion solvation using differential mobility spectrometry (DMS) coupled to mass ... -
Using Pyrene Excimer Fluorescence To Probe Polymer Diffusion in Latex Films
(American Chemical Society, 2017-02-28)This study introduces a simple technique that can be used to quantitatively probe interparticle polymer diffusion (IPD) between adjacent particles in a latex film using pyrene excimer fluorescence (PEF). To demonstrate the ... -
Using Pyrene Excimer Fluorescence To Probe the Interactions between Viscosity Index Improvers and Waxes Present in Automotive Oil
(American Chemical Society, 2017-03-28)A new methodology based on pyrene excimer fluorescence (PEF) was applied to quantitatively measure the actual level of intermolecular association between ethylene propylene (EP) copolymers in toluene in the presence of ... -
Using Pyrene to Probe Interparticle Polymer Diffusion in a Latex Film
(University of Waterloo, 2015-12-16)Fluorescence has been used for many years as a powerful analytical tool to probe the formation of films from aqueous latex dispersions. Currently, the most widely used method is fluorescence resonance energy transfer (FRET), ... -
Utilization of Soft Matter as a Structure Directing Agent for the SYnthesis of Nanostructured Materials
(University of Waterloo, 2015-01-19)Sol-gel methods combined with the adaptive structuring properties of soft matter, have been used to create templates and synthesize mesoporous materials or nanoparticles from them. For example, micelles formed with non-ionic ...