National Repository of Grey Literature 3 records found  Search took 0.00 seconds. 
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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