Identification of polyphenols from plant materials through their silylation and 29Si NMR spectroscopy - line assignement through 29Si-13C spin-spin couplings

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41210%2F05%3A10077" target="_blank" >RIV/60460709:41210/05:10077 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Identification of polyphenols from plant materials through their silylation and 29Si NMR spectroscopy - line assignement through 29Si-13C spin-spin couplings

Original language description

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 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.

Czech name

Identifikace polyfenolů z rostlinných materiálů jejich silylací a 29Si NMR spektroskopie - přiřazení linií spinovým párováním 29Si-13C

Czech description

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 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.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CB - Analytical chemistry, separation

OECD FORD branch

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Project

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Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2005

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Magnetic Resonance in Chemistry

ISSN

0749-1581

e-ISSN

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Volume of the periodical

43

Issue of the periodical within the volume

10

Country of publishing house

GB - UNITED KINGDOM

Number of pages

6

Pages from-to

829-834

UT code for WoS article

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EID of the result in the Scopus database

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