0029075 - UCHP-M 20050158 RIV GB eng J - Journal Article
Schraml, Jan - Blechta, Vratislav - Sýkora, Jan - Soukupová, Ludmila - Cuřínová, Petra - Proněk, D. - Lachman, J.
Characterization of Polyphenols from Plant Materials through Their Silylation and 29Si NMR Spectroscopy - Line Assignment through 29Si, 13C Spin-Spin Couplings.
[Charakterizace polyfenolů z rostlinných materoálů po jejich silylaci pomocí ěíSi NMR spektroskopie. Přiřazení linií pomocí 29Si, 13C spin-spinových interakcí.]
Magnetic Resonance in Chemistry. Roč. 43, č. 10 (2005), s. 829-834. ISSN 0749-1581. E-ISSN 1097-458X
Institutional research plan: CEZ:AV0Z40720504
Keywords : line assignment * long-range couplings * polyphenols
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 1.553, year: 2005

The lines in 29Si NMR spectra of silylated polyphenols and some other compounds are difficult to assign owing to the absence of couplings with protons outside the silyl group. The assignment can be derived through small nJ(29Si, 13C) couplings (n > 1). Using a previously described method for measurements of these couplings, the assignment procedure is demonstrated here on three examples of trimethylsilylated phenols: 7-hydroxyflavone, ferulic acid, and quercetin. In some cases the procedure can be used to identify carbon atoms to which the siloxy groups are attached.

Line ve spektrech lze přiřadit pomocí malých spin-spinových interakcí přes více vazeb . K jejich stanovení slouží autory dříve navržená metoda.
Permanent Link: http://hdl.handle.net/11104/0118955