https://commons.ufh.ac.za/vital/access/manager/Index ${session.getAttribute("locale")} 5 Oxovanadium (IV)-catalysed oxidation of dibenzothiophene and 4, 6-dimethyldibenzothiophene https://commons.ufh.ac.za/vital/access/manager/Repository/vital:51429 Wed 10 Apr 2024 15:13:55 SAST ]]> Imidazole-functionalized polymer microspheres and fibers–useful materials for immobilization of oxovanadium (IV) catalysts https://commons.ufh.ac.za/vital/access/manager/Repository/vital:51431 99%) were obtained in under 240 min with turn-over frequencies ranging from 21.89 to 265.53 h−1, depending on the quantity of catalyst and temperature. The microspherical catalysts also proved to be recyclable with no drop in activity being observed after three successive reactions. The vanadium functionalized fibers were applied in a pseudo continuous flow set-up. Factors influencing the overall conversion and product selectivity, including flow rate and catalyst quantity, were investigated. At flow rates of 1–4 mL h−1 near quantitative conversion was maintained over an extended period. Keeping the mass of catalyst constant (0.025 g) and varying the flow rate from 1–6 mL h−1 resulted in a shift in the formation of the oxidation product methyl phenyl sulfone from 60.1 to 18.6%.]]> Wed 10 Apr 2024 14:17:42 SAST ]]> An ion-imprinted polymer for the selective extraction of mercury(II) ions in aqueous media https://commons.ufh.ac.za/vital/access/manager/Repository/vital:6566 Wed 05 Apr 2023 08:50:45 SAST ]]> A highly selective and sensitive pyridylazo-2-naphthol-poly (acrylic acid) functionalized electrospun nanofiber fluorescence “turn-off” chemosensory system for Ni 2+ https://commons.ufh.ac.za/vital/access/manager/Repository/vital:51428 Wed 05 Apr 2023 08:50:33 SAST ]]> Syntheses, protonation constants and antimicrobial activity of 2-substituted N-alkylimidazole derivatives https://commons.ufh.ac.za/vital/access/manager/Repository/vital:44165 2500 µg mL–1) bacteria and all the compounds were inactive against the yeast (Candida albicans).]]> Fri 09 Feb 2024 15:27:05 SAST ]]>