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2-Oxazoline triblock copolymers with hydrophilic, lipophilic and fluorophilic blocks: from synthesis to hierarchical self-assembly
Kaberov, Leonid ; Štěpánek, Petr (advisor) ; Černoch, Peter (referee) ; Schlaad, Helmut (referee)
DOCTORAL THESIS ABSTRACT 2-Oxazoline triblock copolymers with hydrophilic, lipophilic and fluorophilic blocks: from synthesis to hierarchical self-assembly MSc. Leonid Kaberov The focus of this research was on the study of di- and triblock poly(2-oxazoline) copolymers with fluorinated blocks. The synthesis and solution properties of novel copolymers combining hydrophilic, hydrophobic (lipophilic) and fluorophilic moieties into one segmented molecule were reported. The simple synthetic approach which provides an easy way to attach a CnF2n+1 terminal chain to a poly(2-methyl-2-oxazoline)-block-poly(2-n-octyl-2-oxazoline) copolymer was described. Small-angle neutron and x-ray scattering experiments unambiguously proved the existence of polymersomes, worm-like micelles and their aggregates in aqueous solution. It was shown that increasing content of fluorine in the poly(2-oxazoline) copolymers results in a morphological transition from bilayered or multi-layered vesicles to worm-like micelles. The synthesis of poly(2-perfluoroalkyl-2-oxazoline)s is complicated by their extremely low activity in cationic ring-opening polymerization reaction (CROP), both in the initiation and in the propagation due to strong electron-withdrawing effect of perfluoroalkyl substituent. A detailed systematic study on synthetic...
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Synthesis, organization and dynamic behaviour in poly(p-octylstyrene)-b-poly(butyl methacrylate) block copolymer systems
Černoch, Peter ; Štěpánek, Petr (advisor) ; Sedlák, Marián (referee) ; Hlaváček, Bořivoj (referee) ; Tuzar, Zdeněk (referee)
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Preparation and characterization of nanoparticles for in vitro cell studies
Hladík, Martin ; Černoch, Peter (advisor) ; Pilař, Jan (referee)
This thesis deals with the preparation, characterization methods and in vitro imaging of nanoparticles with great potential for medical diagnostics. A key role in this work occupy nanoparticles comprising a core of calcium tungstate, CaWO4, covered by a natural polysaccharide together serve as a suitable model contrast agent for cell imaging techniques. CaWO4 natural properties such as the absorption of X-rays, natural fluorescence capabilities and capacities for doping fluorescently active lanthanides, makes from nanoparticles suitable candidates for the position of contrast agents for imaging in the diagnosis of oncological diseases. Moreover, by coverage of the inorganic core by natural polysaccharide nanoparticles reach the desired size and the possibility of active targeting to specific or nonspecific interactions with the cell membrane, which are key factors in in vitro cell studies. It was found the most suitable synthesis both doped and undoped core of this model reaching the formation of spherical particles of colloidal dimensions. Doping was realized by red fluorescent trivalent europium, Eu3+ , and green fluorescent trivalent terbium, Tb3+ , and neither of these dopants affected the original crystalline structure CaWO4. In the next stage, these fluorescent nuclei successfully dispersed...
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