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Cyclic and square wave voltammetry of chitooligosaccharides modified by osmium(VI) tetramethylethylenediamine

  1. 1.
    SYSNO ASEP0536414
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    TitleCyclic and square wave voltammetry of chitooligosaccharides modified by osmium(VI) tetramethylethylenediamine
    Author(s) Trefulka, Mojmír (BFU-R) RID, ORCID
    Ostatná, Veronika (BFU-R) RID, ORCID
    Number of authors2
    Article number107494
    Source TitleBioelectrochemistry. - : Elsevier - ISSN 1567-5394
    Roč. 133, č. 2020 (2020)
    Number of pages6 s.
    Publication formOnline - E
    Languageeng - English
    CountryCH - Switzerland
    Keywordsligand complexes ; nucleic-acids ; chitosan ; chitin ; oligosaccharides ; polysaccharides ; chemistry
    Subject RIVCE - Biochemistry
    OECD categoryBiochemistry and molecular biology
    R&D ProjectsGA18-18154S GA ČR - Czech Science Foundation (CSF)
    Method of publishingLimited access
    Institutional supportBFU-R - RVO:68081707
    UT WOS000531827700030
    EID SCOPUS85080060061
    AnnotationCompounds containing vicinal diol (glycol) groups, including saccharides, could be modified with sixvalent osmium complexes with nitrogenous ligands, particularly with N,N,N',N'-tetramethylethylenedia mine (Os(VI)tem). The modification products are electrochemically active. Here we show that aminosaccharides can also be modified by Os(VI)tem. We studied chitosan oligosaccharides in their acetylated and deacetylated form in 0.2 M Na-phosphate, pH 6.9. Deacetylated chitosan oligosaccharides with free amino groups modified by Os(VI)tem yielded two peaks (peak I' at0.15 V and peak II' at about0.38 V) despite the fact that these oligomers contain only one glycol group on the non-reducing end of the molecule. The electrochemical behavior of Os(VI)tem modified deacetylated chitosan oligomers differs from Os(VI)tem modified simple saccharides, containing only glycol groups, predominantly in peak I'. Our results suggest that free amino groups are involved in Os(VI)tem modification of chitosan oligomers. (C) 2020 Elsevier B.V. All rights reserved.
    WorkplaceInstitute of Biophysics
    ContactJana Poláková,, Tel.: 541 517 244
    Year of Publishing2021
    Electronic address
Number of the records: 1  

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