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Catalytic synthesis of polyanilines
Bláha, Michal ; Vohlídal, Jiří (advisor) ; Omastová, Mária (referee) ; Trchová, Miroslava (referee)
This Ph.D. thesis is dealing with catalytic polymerization of aniline (ANI) and partially also of substituted anilines with FeCl3/H2O2 catalyst system, in which according to obtained results both active species, Fe3+ and HO , participate in the overall polymerization mechanism, creating a synergic system. The Fe3+ /H2O2 catalyst system, also called Fenton's system can considerably lower contamination of forming neat polyanilines (PANIs) by side-products characteristic of stoichiometric polymerization. However, catalytically prepared PANIs exhibit reduced conductivity related most probably to side reactions involving radicals generated as integral components of the FeCl3/H2O2 system. Catalytic polymerization of ANI with FeCl3/H2O2 system was found to be the reaction of approx. 2nd order with respect to ANI and gives PANIs of a good quality only when [H2O2] in the reaction mixture was kept low, i.e., at under- stoichiometric ratios [H2O2]/[ANI]. At over-stoichiometric ratio [H2O2]/[ANI], PANIs of lowered conductivity, worse spectroscopic characteristics and increased size of PANI nanostructures were obtained; nevertheless, these PANIs were not over-oxidized to pernigraniline state. The reaction-time profiles of the open-circuit potential of reaction mixtures exhibited an inflection related to the...
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The concept and types of bills of exchange and promissory notes
Blaha, Michal ; Zahradníčková, Marie (advisor) ; Čech, Petr (referee)
- 1 - Abstract The topic of my diploma thesis is "The concept and types of bills of exchange and promissory notes". The reason why I chose this topic is my interest in securities law, especially in bill of exchange law, and my previous work experience. I regularly work with bill of exchange law in my employment so this is a reason why I have decided to expand my knowledge of this particular law. The bill of exchange and check act number 191/1950 Coll., as amended, is the basis of legislation for this kind of law in the Czech Republic. The most significant advantage of this act is the constancy, which is given by the general method of treatment of this issue. This advantage can be considered as one of the main disadvantages too, because the solution of unique issues is left to case law and literature. This is a reason, why the core of this diploma thesis is chapter 5, where I analyse the essential requirements of bill of exchange and promissory note. Also the issue of graphical design is a very interesting and actual topic. The diploma thesis is structure into seven chapters. The first chapter is devoted to the historical development of bill of exchange and promissory note. This chapter contains also the historical development of individual institutes of bill of exchange law. The second chapter discusses the...
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Catalytic synthesis of polyanilines
Bláha, Michal
This Ph.D. thesis is dealing with catalytic polymerization of aniline (ANI) and partially also of substituted anilines with FeCl3/H2O2 catalyst system, in which according to obtained results both active species, Fe3+ and HO , participate in the overall polymerization mechanism, creating a synergic system. The Fe3+ /H2O2 catalyst system, also called Fenton's system can considerably lower contamination of forming neat polyanilines (PANIs) by side-products characteristic of stoichiometric polymerization. However, catalytically prepared PANIs exhibit reduced conductivity related most probably to side reactions involving radicals generated as integral components of the FeCl3/H2O2 system. Catalytic polymerization of ANI with FeCl3/H2O2 system was found to be the reaction of approx. 2nd order with respect to ANI and gives PANIs of a good quality only when [H2O2] in the reaction mixture was kept low, i.e., at under- stoichiometric ratios [H2O2]/[ANI]. At over-stoichiometric ratio [H2O2]/[ANI], PANIs of lowered conductivity, worse spectroscopic characteristics and increased size of PANI nanostructures were obtained; nevertheless, these PANIs were not over-oxidized to pernigraniline state. The reaction-time profiles of the open-circuit potential of reaction mixtures exhibited an inflection related to the...
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Synthesis and Spectral Properties of Novel Poly(disubstituted acetylene)s
Duchoslavová, Zuzana ; Bláha, Michal (referee)
The synthesis of new acetylenes, R1C≡CR2, (R1=4-t-butylphenyl; R2=4-[(t- butyl)(diphenyl)silyloxy]phenyl; 1-naphthyl; 2-naphthyl) is reported. All monomers were characterized by the means of standard spectroscopic methods. R1C≡CR2 give well soluble polyacetylenic polymers -[C(R1)=C(R2)]-n, in polymerization with TaCl5/SnBu4. Polymerizability increases with increasing monomer triple bond accessibility for the catalyst. The photoluminescence yield of the polymers rises in the R2 order: 1-naphthyl < 2-naphthyl < 4-[(t-butyl)(diphenyl)-silyloxy]phenyl.
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Dolování dat jako součást podnikového zpravodajství
Bláha, Michal ; Rydzi, Daniel (advisor) ; Studnička, Lumír (referee)
Práce se věnuje problematice ?dolování dat jako součást podnikového zpravodajství?. Dolování dat, v širším významu dobývání znalostí z databází, je součástí oblasti nazývané Business Intelligence (BI). Tento pojem lze definovat jako ?komplex procesů, aplikací a technologií IS/ICT, které téměř výlučně podporují analytické a plánovací činnosti podniku?.[1] Práce popisuje jednotlivé komponenty Business Intelligence a jejich význam. Jednou z těchto komponent může být právě dolování dat. Kapitola věnovaná této problematice obsahuje její popis a uvádím zde metody, které patří k nejdůležitějším. Práce obsahuje i kapitolu věnovanou oblasti databází, neboť tato problematika je velice blízká jejímu tématu.
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