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Preparation and properties of α,ω-bis(terpyridyl)oligothiophenes and related supramolecular polymers
Štenclová, Pavla ; Svoboda, Jan (advisor) ; Pfleger, Jiří (referee)
Presented diploma thesis describes synthesis of novel α,ω-bis(terpyridyl)bithiophenes and α,ω-bis(terpyridyl)terthiophenes with alkyl substituents on thiophene rings. The α,ω- -bis(terpyridyl)oligothiophenes were prepared using Suzuki-Miyaura coupling of 4'-(5- -bromo-3-alkylthien-2-yl)terpyridine with 2,5-thiophenediboronic acid and 2,2'-bi(1,3,2- -dioxaborolane), respectively. The succesfull transformation of 4'-(5-bromo-3-alkylthien-2- -yl)terpyridine to corresponding bis(terpyridyl)oligothiophenes was confirmed by NMR and HR-MS analyses and IR spectroscopy. UV-vis spectroscopy, excitation and emission photoluminescence (suplemented with determination of photoluminescence quantum yields) and cyclic voltammetry were used to study spectroscopic and redox properties of novel α,ω-bis(terpyridyl)oligothiophenes and previously prepared unsubstitued α,ω-bis(terpyridyl)bithiophene and α,ω-bis(terpyridyl)- terthiophene. Interaction of zinc ions with ligands soluble in tetrahydrofurane was studied using UV-vis spectroscopy and emission photoluminescence spectroscopy. Main-chain supramolecular polymers were sucessfully prepared from four soluble ligands and zinc ions. Properties of prepared polymers were studied using UV-vis spectroscopy, excitation and emission photoluminescence spectroscopy and IR...
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Materials containing conducting polymers
Blinova, Natalia ; Stejskal, Jaroslav (advisor) ; Pfleger, Jiří (referee) ; Žigon, Majda (referee)
l. Aims of the Thesis The goal of the Thesis is ůeprlaaraiior ..f .'a:ious norpho|ogies produced by conductingpoly.rners, riz. polvaniline (P{\Ji. the.-onrol of ce.n,tu.-:rrrl. a.rC the understanding of the chemistrv of aniline oxidatton. In rhese studies. three ditTerenr drrectiors have been developed. The first pan of the Thesrs rs focused on the slnthesrs of p.{NI. The oprrmum conditions for preparation of all forms available: powders, thin films, and colloidal dispersrons with respect to the morphology' ýeld, and conductiúý have been described. A systematic study of PANI protonated with phosphoric acid as well as a comparative study of the preparation of PANI and polypynole (PPy) have been made. The oxidation of aniline with noble-merals compounds, such as silver nitrate, the effect of the medium acidity, concentration of reacunts and the possible effect of daylight have been invesrigated. A new approach for the synthesis of PANI with separated reactants, aniline and an oxidant, is described in the second part of the Thesis. Various studies have been presented here to investigate the mechanisms of such reactions. The concept of coupled PANl-assisted redox reaction by means oftransport ofelectrons and protons through conducting PANI membrane has been demonstrated. A possible electron-ion-coupled...
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