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The oxidative decomposition of natural bioactive compound rhamnetin

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F17%3A00471294" target="_blank" >RIV/61388955:_____/17:00471294 - isvavai.cz</a>

  • Result on the web

    <a href="http://dx.doi.org/10.1016/j.jelechem.2017.01.054" target="_blank" >http://dx.doi.org/10.1016/j.jelechem.2017.01.054</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1016/j.jelechem.2017.01.054" target="_blank" >10.1016/j.jelechem.2017.01.054</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    The oxidative decomposition of natural bioactive compound rhamnetin

  • Original language description

    The oxidation of the natural bioflavonoid rhamnetin was studied by a multi-analytical approach. It was widely used as a dye for colouring tapestries, and it is known for degrading in the presence of atmospheric oxygen and light. The oxidation mechanism was studied by cyclic voltammetry and UV–Vis spectroelectrochemical methods in aqueous solution on glassy carbon and platinum electrodes. Two-electron and two-proton oxidation proceeds in acidic solution, while two-electron and one-proton oxidation was found for a dissociated molecule of rhamnetin, and one electron oxidative process was obtained for the dianion present in alkaline solution. The complicated oxidation mechanism involves not only electron transfer, but also several coupled chemical reactions. The products were identified by HPLC-DAD and HPLC-ESI-MS/MS techniques. The distribution of oxidation products was strongly dependent on the duration of exposure to atmospheric oxygen. The main oxidation product was identified as 2-[(3,4-dihydroxyphenyl)carbonyl]-2,4-dihydroxy-6-methoxy-1-benzofuran-3(2H)-one. Because rhamnetin in solution was fully degraded by oxygen in 6 min, it was necessary to prepare its solutions under argon atmosphere prior any electrochemical measurement.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10406 - Analytical chemistry

Result continuities

  • Project

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2017

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Journal of Electroanalytical Chemistry

  • ISSN

    1572-6657

  • e-ISSN

  • Volume of the periodical

    788

  • Issue of the periodical within the volume

    MAR 2017

  • Country of publishing house

    CH - SWITZERLAND

  • Number of pages

    6

  • Pages from-to

    125-130

  • UT code for WoS article

    000397361300017

  • EID of the result in the Scopus database

    2-s2.0-85012026093