220 research outputs found
2-amino-6-nitrobenzothiazole
No full textKatedra technologie organických látekDokončená práce s úspěšnou obhajobo
A study on the spectral changes of reactive textile dyes and their implications for online control of dyeing processes
No full textEvidence is presented that confirms the colour changes of a widely used trichromatic mixture of bifunctional reactive dyes (Levafix CA) under alkaline conditions, showing that they occur slowly and throughout the dyeing time, and not instantly after alkali addition to the dyebath. Thus, it is impossible to determine the specific absorptivity of the dyes at each moment of the dyeing process. An investigation into the relationship of the type of reactive group to the dye and the visible spectral changes over time was undertaken. Model reactive dyes were studied. The samples collected from the simulated dyebaths were monitored online using an automated system and their absorption on the whole of the visible spectrum was measured. The studies of dyes that included halo-s-triazinyl groups revealed the existence of hypochromic shifts in the spectra of the dyes in the presence of an electrolyte (sodium chloride or sodium sulphate) and bathochromic and hyperchromic shifts, when evaluated in the presence of alkaline agents. However, the vinylsulphonyl derivatives present a more stable spectral profile. The use of buffer solution at pH 5 was an efficient method to stabilise the absorption profile of Levafix CA trichromatic samples.We thank Fundacao para a Ciencia e Tecnologia and FEDER (POCTI-SFA-3-686). Radim Hrdina thanks the Ministry of Education, Youth and Sports of the Czech Republic for research grant VS MSMT 0021627501
Synthesis of annelated ferrocene compounds by C-H activation
No full textTitle: Synthesis of annelated ferrocene compounds by C-H activation Author: Věra Varmužová Department: Department of Inorganic chemistry Supervisor: prof. RNDr. Petr Štěpnička, Ph.D., DSc. Abstract: This diploma thesis disrcibes the synthesis of two annelated ferrocenes, ferroceno[c]isoquinoline (9) and benzo[f]ferroceno[c]isoquinoline (13). Starting compound used for their synthesis, [(methylsulfonyl)amino]ferrocene, was prepared from aminoferrocene. During the synthesis of compound 9, the reaction sequence was optimized, which includes the nucleophilic substitution, C-H activation and aromatization. Compound 13 was prepared similarly using the optimized reaction conditions An intermediate prepared during the synthesis of compound 9, 1,2-dihydro-2-(methylsulfonyl)ferroceno[c]isoquinoline (7), was additionally used to prepare cationic ruthenium complex 14, wherein it links as a η6 -ligand via its benzene ring. For compounds 7, 9 and 14 UV-VIS absorption spectra were recorded and compared. Key words: ferrocene, annelated ferrocenes, C-H activation, organometallic chemistr
Premonstratensian privileges in the canonical law currently in effect
No full textAnglická anotace Diploma Thesis Title Premonstratensian Privileges in the Canonical Law currently in effect Author Bc. Pavel Vácha Supervisor Doc. JUDr. Antonín I. Hrdina, DrSc. Annotation The theme of this work, i.e. Premonstratensian order privileges, is certainly not an extremely attractive topic for wide public. The auditorium, logically, limits itself to members of this particular order and those who are anyhow facing related problems. However, with regard to its systematic approach, this work may become contributive for those, who concentrate on studying privileges as phenomena both in secular, and in canonical law. The author has himself set rather a difficult goal: not to present an essay on Premonstratensian privileges requesting previous studies of privileges both in secular, and, consequently in canonical law, but, just conversely: step-by step, he accompanies the reader through this topic, starting from a general level, to individual privileges of this order. Therefore, the first section starts with characteristics of a privilege, and describes its usage in Roman law, which can be considered a joint source for secular and general law. The second section, however, is fully dedicated to canonical law. The first part concentrates on a historical overview of use of privileges, with a special..
Premonstratensian privileges in the canonical law currently in effect
No full textAnglická anotace Diploma Thesis Title Premonstratensian Privileges in the Canonical Law currently in effect Author Bc. Pavel Vácha Supervisor Doc. JUDr. Antonín I. Hrdina, DrSc. Annotation The theme of this work, i.e. Premonstratensian order privileges, is certainly not an extremely attractive topic for wide public. The auditorium, logically, limits itself to members of this particular order and those who are anyhow facing related problems. However, with regard to its systematic approach, this work may become contributive for those, who concentrate on studying privileges as phenomena both in secular, and in canonical law. The author has himself set rather a difficult goal: not to present an essay on Premonstratensian privileges requesting previous studies of privileges both in secular, and, consequently in canonical law, but, just conversely: step-by step, he accompanies the reader through this topic, starting from a general level, to individual privileges of this order. Therefore, the first section starts with characteristics of a privilege, and describes its usage in Roman law, which can be considered a joint source for secular and general law. The second section, however, is fully dedicated to canonical law. The first part concentrates on a historical overview of use of privileges, with a special..
Barviva na živočišná vlákna a syntetické polyamidy
No full textPráce je zaměřena na výzkum reaktivních barviv pro živočišná vlákna a polyamidy.Katedra technologie organických látekDokončená práce s úspěšnou obhajobo
Synthesis of axially chiral pyridin N-oxides and their application in organocatalysis
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