Národní úložiště šedé literatury Nalezeno 22 záznamů.  předchozí3 - 12další  přejít na záznam: Hledání trvalo 0.00 vteřin. 
Carbon-Carbon Couplings between Chemically Equivalent or almost Equivalent Nuclei.
Blechta, Vratislav ; Strašák, Tomáš ; Sýkora, Jan
We present here a modification of the above experiment with the aim of increasing the sensitivity. This can be achieved by 2D J-resolved refocused INADEQUATE without decoupling during preparation period but with decoupling during acquisition and equilibrium periods. The experiment is discussed with respect to the sensitivity and influence of strong couplings.
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Measurement of Carbon-Carbon Coupling between Chemically Equivalent Nuclei.
Blechta, Vratislav ; Strašák, Tomáš ; Sýkora, Jan
We present here a modification of the above experiment with aim of increasing the sensivity. The experiment is discussed with respect to the sensivity and influence of strong couplings.
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Molecular Dynamics in Selected Polycyclic Aromatic Compounds Monitored by Measurement of Selected Structural Parameters
Sýkora, Jan ; Strašák, Tomáš ; Blechta, Vratislav ; Dračínský, Martin ; Císařová, I.
The polycyclic aromatic compounds attract scientific attention namely due to their conjugated π-π aromatic systems which promise many interesting and unusual optical and electronic properties. Some of these compounds were shown to be effective in the development of materials useful e.g. in molecular-based electronics.
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29Si NMR Phenylsilane Polymer Analysis
Pinkas, Jiří ; Blechta, Vratislav ; Karban, Jindřich ; Sýkora, Jan
Here we focus on the analysis od dehydrocoupling polymerization reactions of phenylsilane. the molar mass distribution depends on the catalytic system and can be easily monitored by on-flow LC-NMR experiment.
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Detection of Signed Homonuclear Couplings between Low Abundant Nuclei
Blechta, Vratislav ; Schraml, Jan
The subject of this lecture is a modification of CSEc method for detection of signed homonuclear couplings. The new sequence is neither trivial nor simple application of the CSEc but some tricks are used to design broadband pulse sequence without selective pulses. The sequence was proved on a few samples by measuring carbon-carbon two- and three-bond couplings. For the first time signs of 2J(Si-O-Si) couplings were measured on a set of siloxane oligomers with different bond maps. The results will be presented.
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Národní úložiště šedé literatury : Nalezeno 22 záznamů.   předchozí3 - 12další  přejít na záznam:
Viz též: podobná jména autorů
1 Blechta, Václav
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