Browsing Science (Faculty of) by Supervisor "Duhamel, Jean"
Now showing items 1-17 of 17
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Associations between Oil Additives in Base Oils Probed by Pyrene Excimer Fluorescence
(University of Waterloo, 2017-10-23)A recently developed method based on pyrene excimer fluorescence was used to probe the interactions of important polymeric oil additives. First, three ethylene-propylene (EP) copolymers representative of viscosity index ... -
Calibrating the Long-Range Backbone Dynamics of Polymers in Solution Using Two Different Models
(University of Waterloo, 2022-09-29)The fluorescence decays of a series of 41 pyrene-labeled poly(oligo(ethylene glycol)methyl ether methacrylate)s (Py-PEGnMA where n = 0, 1, 2, 3, 4, 5, 9, 16, 19) were prepared by free-radical polymerization of 1-pyrenebutyl ... -
Characterization of Hydrophobically Modified Starch Nanoparticles by Pyrene Fluorescence
(University of Waterloo, 2017-01-25)Starch nanoparticles (SNPs) were hydrophobically modified with propionic (C3) and hexanoic (C6) anhydride via esterification. Different degrees of substitution (DS) of the hydroxyl groups of the SNPs were achieved by varying ... -
Characterization of PIBSI Dispersants and Their PIBSA Components by Pyrene Excimer Fluorescence
(University of Waterloo, 2020-12-18)Methods are introduced to characterize the products resulting from the coupling of a polyisobutylene terminated at one end with a succinic anhydride (PIBSA) and a polyamine to generate PIBSI products where the polyamine ... -
Characterization of Polysaccharides in Starch using Fluorescence Techniques
(University of Waterloo, 2020-09-25)Amylose and amylopectin, which are the two main constituents of starch, were characterized using the pyrene excimer fluorescence (PEF) technique. First, an amylose sample was randomly labeled with the dye pyrene to yield ... -
Characterization of Self-Assembling Quinoline- Based Foldamers by Fluorescence Anisotropy
(University of Waterloo, 2019-09-24)Foldamers represent a family of synthetic macromolecules which, like their biological counterparts, are able to adopt a well-defined conformation in solution. Oligoquinoline-carboxamides (Qn) are a group of foldamers that ... -
Characterization of the Conformation and Internal Backbone Dynamics of a-Polyglucans by Pyrene Excimer Fluorescence
(University of Waterloo, 2021-11-23)The conformation and internal backbone dynamics (IBD) of several pyrene-labeled polysaccharides (Py-PSs), namely Py-Amylopectin, Py-Glycogen, Py-Dextran, and Py-Pullulan, were successfully examined with a combination of ... -
Characterizing Polymers with Complex Architecture using Pyrene Excimer Fluorescence
(University of Waterloo, 2021-09-29)This thesis combines two different models, namely the model free analysis (MFA) and the fluorescence blob model (FBM), that were used to study the conformation and internal dynamics of two highly branched macromolecules, ... -
Detection of Nitroaromatic Compounds through Fluorescence Quenching of Pyrene Labeled Starch Nanoparticles
(University of Waterloo, 2018-12-10)The aim of this research was to demonstrate the potential application of starch nanoparticles (SNPs) labeled with 1-pyrenebutyric acid (PBA) as the active component in optical sensors used for the detection of minute ... -
Enhanced Diffusion in Latex Films Induced by Oligomers and Characterized by Pyrene Excimer Fluorescence
(University of Waterloo, 2019-09-24)Pyrene excimer fluorescence (PEF) was used to investigate the effects that the presence of low molecular weight oligo(n-butyl methacrylate) (OBMA) have on the diffusion of high molecular weight poly(n-butyl methacrylate) ... -
Fluorescently Labeled Latex Particles to Monitor Film Formation
(University of Waterloo, 2017-10-25)The influence of the length of an oligo(ethylene glycol) spacer (EGn, where n is the number of ethylene glycol units) in a 1-pyrenemethoxy-EGn methacrylate (PyEG-MA) monomer on the incorporation of the monomer into a ... -
Long Range Polymer Chain Dynamics Probed with Pyrene Excimer Fluorescence
(University of Waterloo, 2016-09-27)A series of fluorescently labeled vinyl polymers bearing a C1-C18 side-chain (namely poly(methyl methacrylate), poly(butyl methacrylate), poly(octyl methacrylate), poly(lauryl methacrylate), and poly(stearyl methacrylate) ... -
Self-association of Oligoquinoline Foldamers Probed by Time-Resolved Fluorescence Anisotropy
(University of Waterloo, 2022-01-31)The self-associations of oligoquinoline-based foldamers (OPV-QₙA with n = 4, 8, 17, and 33) terminated at one end with a carboxylic acid (A) and at the other end with the fluorescent dye oligo(phenylene vinylene) (OPV) ... -
The Structure and Internal Dynamics of Polypeptides Probed with Pyrene Excimer Fluorescence
(University of Waterloo, 2021-01-25)A combination of pyrene excimer fluorescence, fluorescence blob model (FBM), and molecular mechanics optimizations (MMOs) was applied to characterize a series of pyrene-labeled polypeptides. Analysis of the fluorescence ... -
Synthesis and Characterization of Furan-Based Non-ionic Surfactants (FBNIOS)
(University of Waterloo, 2021-01-27)A series of furan-based non-ionic surfactants (fbnios) derived from 5-(chloromethyl)furfural (5-CMF), a feedstock prepared by Origin Materials through a carbon negative process, were prepared from commercially available ... -
Synthesis and Characterization of Two Pyrene Labeled Gemini Surfactants and their Interactions with Oppositely Charged Molecules
(University of Waterloo, 2022-06-09)Cationic gemini surfactants (GS) have attracted the attention of the scientific community as potential carriers of genetic cargo for gene transfection applications. These GS/polynucleotides complexes have been extensively ... -
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), ...