Search Results (8)
Synthesis and investigation of organofluorosilicate and organofluorogermanate species
Fluorine, though abundant on Earth, is not readily available in a form suitable for organic synthesis. While fluoride salts like fluorite exist, they have limited reactivity due to solubility properties. Converting fluorite to hydrofluoric acid (HF) or fluorine gas (F2) increases reactivity but introduces significant safety concerns due to the …
Surface modifications of cellulose nanomaterials: mechanisms, kinetics and their applications
Synthesized in green plants, cellulose is the most abundant natural biopolymer on the planet and is thus widely available, cheap and renewable. Furthermore, its hierarchical structure allows extraction of nanosized particles in the form of cellulose nanocrystals (CNCs), obtained with hydrolysis or cellulose nanofibrils (CNFs), isolated through chemical, biological pretreatment …
Discrete aluminium compounds – towards a soluble aluminium trifluoride
In the past, the search for soluble aluminium trifluoride (AlF3) led to the discovery of organoaluminium compounds (AlR3) and organoaluminium fluorides. However, suitable methods for the introduction of fluorine into AlR3 are still scarce, making the discrete AlF3 and organoaluminium fluoride compounds rare. Our investigation of the reactivity of cyclic …
Low-Pressure Plasma Functionalisation of Fluoropolymers
In the present thesis, the problem of the functionalisation of fluoropolymers was addressed. As chemical methods for the functionalisation of fluoropolymers apply environmentally harmful chemicals, the research was directed to low-pressure non-equilibrium radiofrequency (RF) inductively coupled plasmas of environmentally friendly gasses. The research was focused on polytetrafluoroethylene (PTFE), the most …
Determination of fluorine in some food and environmental samples
This thesis deals with the determination of fluorine in various food and environmental samples. A method for fluoride determination is fluoride ion selective electrode (F-ISE). This method relies on the determination of free fluoride ions (F–), therefore the samples must undergo total sample decomposition prior to F– measurement. Three methods …
Reactions of fifth group Lewis acids with nitriles and imidazolium-based compounds
Coordination chemistry of N‑heterocyclic carbenes (NHC) with early transition metals is often overlooked and in the shadow of the reactions done with the flagship NHC complexes with coinage and other mid to late transition metals. The attention toward NHC complexes with fluoride or oxide fluoride reagents of oxophilic metals further …
Corrosion and corrosion protection of aluminium alloys by zirconium conversion coatings
The subject of this doctoral dissertation is the corrosion protection of aluminium alloys. Aluminium alloys are important technological materials with excellent mechanical properties but prone to corrosion in chloride and other aggressive environments which may provoke the localized or uniform dissolution of the alloy surface. The susceptibility to corrosion originates …
Development of new anti-bioadhesive surfaces for specific neurodegenerative agents
The research work presented in this thesis considers the development of new biocompatible surfaces that are able to control the adhesion of specific proteins responsible for the development of neurodegenerative diseases such as Creutzfeldt–Jakob, Alzheimer, Parkinson and Lewis body disease. Our approach was focused on problems prior to the detection …