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Researchers in the Faculty of Science are involved in an impressive variety of fields – from astrophysics to zoology, nanotechnology to virtual reality, metabolomics to mathematics and much more!
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Browsing Science by Department "Chemistry"
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Item Open Access THE 1,4 C-O SILYL MIGRATIONS OF VARIOUS FURAN AND THIOPHENE SYSTEMS(Elsevier, 1989) Keay, Brian A.; Spinazze, Patrick G.Item Open Access THE 1,4-0->C SILYL MIGRATIONS OF VARIOUS 3-[(TRIALKYLSILYL)-OXYMETHYL]-FURANS AND -THIOPHENES(Elsevier, 1987) Keay, Brian A.; Bures, Edward J.Item Open Access 1-Borabarrelene Derivatives via Diels-Alder Additions to Borabenzenes(American Chemical Society, 2006) Wood, T.K.; Piers, W.E.; Keay, Brian A.; Parvez, M.Item Open Access 2-(1-Naphthyl)cyclohexyl 2-methylfuran-3-carboxylate(Blackwell Publishing, 2001) Parvez, M.; Hunt, I. R.; Keay, B. A.Item Open Access 2-(1-Naphthyl)cyclohexyl 3-furancarboxylate(Blackwell Publishing, 2001) Parvez, M.; Hunt, I. R.; Keay, Brian A.Item Open Access 2-Furyl Phosphines as Ligands for Transition-Metal-Mediated Organic Synthesis(American Chemical Society, 2001) Andersen, Neil G.; Keay, Brian AItem Open Access 2-Phenylcyclohexyl 3-furancarboxylate(Blackwell Publishing, 2001) Parvez, M.; Hunt, I. R.; Keay, Brian A.Item Open Access 3,3'-Disubstituted BINAP Ligands: Synthesis, Resolution, and Applications in Asymmetric Hydrogenation(American Chemical Society, 2005) Hopkins, J. Matthew; Dalrymple, Sean A.; Parvez, Masood; Keay, Brian A.Item Open Access Acetals of y-oxo-a,B-unsaturated esters in nitrone cycloadditions. Regio- and stereochemical implications(Elsevier, 2001) Keay, Brian A.; Alibes, Ramon; Busque, Felix; de March, Pedro; Figueredo, Marta; Font, Josep; Gambino, Maria EsmeraldaItem Open Access Acidity and Salt Precipitation on the Vasa; The Sulfur Problem(International Council of Museums, Committee for Conservation - Wet Organic Archaeological Materials, 2001) Jalilehvand, Farideh; Sandstrom, Magnus; Persson, Ingmar; Gelius, Ulrik; Frank, PatrickItem Open Access Activation of Si-H bonds across the nickel carbene bond in electron rich nickel PCcarbeneP pincer complexes(Royal Society of Chemistry, 2015-11-27) Piers, Warren E.; LaPierre, Etienne A.; Spasyuk, Denis M.; Bi, David W.Silicon–hydrogen bonds are shown to add to a nickel carbon double bond to yield nickel α-silylalkyl hydrido complexes. Kinetic and isotope labeling studies suggest that a concerted 4-centred addition across the Ni[double bond, length as m-dash]C bond is operative rather than a mechanism involving Si–H oxidative addition. This constitutes an example of Si–H bond activation via ligand cooperativity.Item Open Access Active Control of Selectivity in Organic Acid Analysis by Gas Chromatography(2020-03-04) Darko, Ernest; Thurbide, Kevin B.A new method that allows organic acid selectivity to be dynamically controlled during gas chromatography (GC) is presented. It employs dual in-series stainless steel columns, each coated with a pH-adjusted water stationary phase. The first is a 2 m column coated with a pH 11.4 phase that is connected to a second 11 m column coated with a pH 2.2 phase. In this arrangement, organic acids within sample mixtures are trapped on the first column, while the remaining non-ionizable components continue to separate and elute in the system. Later, by injecting a volatile formic acid solution, the trapped acids are released in-situ to the second column for separation and analysis as desired. The method provides good reproducibility with analyte retention times in consecutive trials yielding an average RSD of 1.9 %. Further, depending on column temperature, analytes can be readily retained for periods investigated up to about 30 minutes without significant deterioration in peak shape. This feature provides considerable control over analyte selectivity and resolution compared to conventional separations. Further, by adding a third conventional GC column in-series, both typical hydrocarbon and enhanced organic acid separations are made possible. The method is applied to the analysis of complex mixtures and matrix interference is found to be significantly minimized. Results indicate that this approach offers beneficial advantages for the selective GC analysis of such acidic analytes.Item Open Access Adsorbed lumiflavin at mercury electrode surfaces(Elsevier, 1998) Birss, Viola I.; McGarvey, C.; Beck, S.; Quach, S.; Elzanowska, H.Item Open Access Adsorption of quaternary pyridinium compounds at Pt electrodes in neutral and weakly alkaline solutions(Elsevier, 2003) Birss, Viola I.; Dang, Kitty; Wong, Jennifer E.; Wong, Rick P.C.Item Open Access Alkylation of Carbonyl Compounds with w-Iodo-2-trimethylstannylalk-1-enes. Novel Annulation Sequences Leading to Diene Systems(Royal Society of Chemistry, 1985) Piers, E.; Friesen, R. W.; Keay, B. A.Item Open Access Analyses of sulfur and iron in marine-archaeological wood(International Council of Museums, 2005) Jalilehvand, Farideh; Sandström, Magnus; Fors, Yvonne; Damian, Emiliana; Gelius, UlrikItem Open Access Analysis of Sulfur Compounds Using a Water Stationary Phase in Gas Chromatography with Flame Photometric Detection(Analytical Methods, 2017-01-20) Thurbide, Kevin; McKelvie, KaylanThe properties of using a water stationary phase for analyzing organic sulfur compounds in capillary gas chromatography (GC) with a flame photometric detector (FPD) are presented. The water phase was not found to hinder FPD performance, which provided a detection limit near 30 pgS/s and excellent selectivity for sulfur over carbon. Several different organosulfur compounds were examined and found to be retained to varying degrees on the phase. In many cases, analyte water solubility and polarity appeared to correlate well with retention, whereas analyte volatility did not. By comparison, non-polar hydrocarbons were generally unretained in the system. This prevented their co-elution with sulfur analytes and the response quenching that is often observed in conventional GC-FPD. Of note, when a gasoline sample was analyzed on a standard DB-1 column, the response of the sulfur analytes present was found to be quenched by about 50% due to the overlapping hydrocarbon species also present. However, the same sample analyzed on the water stationary phase displayed no response quenching. Additionally, it was found that sulfur compounds present in different aqueous matrices such as wine, milk, and urine could also be readily and directly analyzed without interference, since many of the large hydrophilic matrix components present are often fully retained on the phase. Results indicate that this method can provide a useful alternative for the analysis of organosulfur compounds in complex matrices.Item Open Access Anion and water involvement in hydrous Ir oxide redox reactions in acidic solutions(Elsevier, 1999) Birss, Viola I.; Bock, C.Item Open Access THE ANODIC BEHAVIOR OF SILVER IN CHLORIDE SOLUTIONS—I. THE FORMATION AND REDUCTION OF THIN SILVER CHLORIDE FILMS(Elsevier, 1987) Birss, Viola I.; Smith, C. K.Item Open Access Anomalous 5-endo-trig reversals: general reactions of 7-oxabicyclo[2.2.1] heptenes and heptanes(National Research Council Canada, 1984-06) Keay, Brian A.; Rajapaksa, D.; Rodrigo, R.