Department of Chemistry and Polymer Science
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Light-driven proton transfer for cyclic and temporal switching of enzymatic nanoreactors
(Wiley Online, 2020-08)Temporal activation of biological processes by visible light and subsequent return to an inactive state in the absence of light is an essential characteristic of photoreceptor cells. Inspired by these phenomena, light-responsive ... -
Tracking lubricants during single screw extrusion of uPVC
(Elsevier, 2020-04-02)Lubrication is one of the most important parameters in unplasticized polyvinyl chloride (uPVC) processing apart from the PVC resin and processing equipment. Lubricants are used in specific ratios to ensure effective fusion ... -
Responsivity analysis of smart nanoparticles using Field-Flow Fractionation
(Stellenbosch : Stellenbosch University, 2021-02)ENGLISH ABSTRACT: Future research on advanced nanoparticles will be based on well-defined, characterized nanostructured materials. Smart polymersomes, in particular, exhibit a variety of characteristics that are essential ... -
Surface modification of commercially available thermoplastics for biological applications
(Stellenbosch : Stellenbosch University, 2022-11)ENGLISH ABSTRACT: The immobilization of bioactive compounds onto functionalized surfaces has been utilized extensively in biosensors, microarrays, and enzyme reactors. Synthetic polymers, especially commercial thermoplastic ... -
Developing marker technologies to probe complex polymers and products
(Stellenbosch : Stellenbosch University, 2022-11)ENGLISH ABSTRACT: Fluorescent imaging has proven to be a valuable tool across a wide variety of applications. It can help with detecting, locating and observing the interactions between different molecules. This study ... -
Bonding interactions in congested molecules: a study of the interatomic forces and the molecular electrostatic potential
(Stellenbosch : Stellenbosch University, 2022-09)ENGLISH ABSTRACT: The purpose of this research is to apply the quantum theory of atoms in molecules (QTAIM) to the molecular electrostatic potential (MEP) field and use the topology of the MEP to determine whether a ... -
Pressure-gradient sorption calorimetry of flexible porous materials : implications for intrinsic thermal management
(Wiley, 2020-08)Thermal management is an important consideration for applications that involve gas sorption by flexible porous materials. A pressure-gradient differential scanning calorimetric method was developed to measure the energetics ... -
Direct determination of enthalpies of sorption using pressure-gradient differential scanning calorimetry: CO2 sorption by Cu-HKUST
(Wiley, 2020-06-01)Enthalpy of sorption (ΔH) is an important parameter for the design of separation processes using adsorptive materials. A pressure-ramped calorimetric method is described and tested for the direct determination of ΔH values. ... -
Microporosity of a guanidinium organodisulfonate hydrogen-bonded framework
(Wiley, 2019-10)Guanidinium organosulfonates (GSs) are a large and well-explored archetypal family of hydrogen-bonded organic host frameworks that have, over the past 25 years, been regarded as nonporous. Reported here is the only example ... -
Excimer and Exciplex Formation in Gold(I) Complexes Preconditioned by Aurophilic Interactions
(Wiley, 2020-02)Excimers and exciplexes are defined as assemblies of atoms or molecules A/A’ where interatomic/intermolecular bonding appears only in excited states such as [A2]* (for excimers) and [AA’]* (for exciplexes). Their formation ... -
In vitro analysis of the combinatory effects of novel aminonaphthoquinone derivatives and curcumin on breast cancer progression
(International Institute of Anticancer Research, 2020-01)Background/aim: We previously reported the potential of aminonaphthoquinone derivatives as therapeutic agents against breast and other oestrogen-responsive tumours when combined with curcumin. This study aimed at screening ... -
Structure-activity and mechanistic investigations into the cytotoxicity of flavonols in cancer cells
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: Flavonols belong to a group of polyphenolic compounds that are found in medicinal and edible plants. They have a broad range of medicinal properties including anti-cancer properties, being able to ... -
Investigating the geometry of dithiadiazolyl rings
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: In this study, the internal geometry of 1,2,3,5-dithiadiazolyl (DTDA) rings, and how it is affected by charge and dimerisation, was investigated through the synthesis of compounds, spectroscopic titrations, ... -
Polymer-coated magnetic nanoparticles and polymer nanoparticles for the treatment of Mycobacterium tuberculosis (Mtb)
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: Tuberculosis (TB) can be classified as a neglected disease where an estimated one fourth of the world’s population could be infected with Mycobacterium tuberculosis (Mtb) in the form of latent TB. ... -
Solid-liquid separation of xylene isomers using metallocycles
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: Host-guest chemistry is an important concept in supramolecular chemistry. Porous hosts may be able to selectively accommodate guests, making them attractive candidates for potential applications such ... -
Schiff-base Ni nanoparticles as catalysts in olefin polymerization reactions
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: Since the 1960’s, the application of discrete Schiff-base nickel complexes has been used in the catalytic polymerization and oligomerization of various olefinic monomers with great success. To promote ... -
Synthesis and characterization of fluorous-stabilized metal nanoparticles for evaluation in fluorous biphasic catalysis
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: A fluorous biphasic approach as a green strategy for the facile recycling and re-use of expensive catalysts, has been probed. A series of fluorous-stabilized Au NPs were successfully synthesized using ... -
Solid-state interactions of materials: Applications-based solid-state NMR spectroscopy
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: The solid-state interactions of various polymeric materials were investigated in this study to determine how these interactions affect the macroscopic properties of the solid. The work presented in this ... -
Cyclization of enaminones derived from N-phenacylpyrrolidin-2-ones to pyrrolizines under acidic conditions
(ARKAT USA, 2020)ENGLISH ABSTRACT: Several N-phenacyl enaminones, prepared by Eschenmoser sulfide contraction between Nphenacylpyrrolidine-2-thiones and a range of substituted phenacyl halides, were transformed into 2,3- dihydro-1H-pyrrolizines ... -
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