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Cyclic and square wave voltammetry of chitooligosaccharides modified by osmium(VI) tetramethylethylenediamine
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SYSNO ASEP 0536414 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Cyclic and square wave voltammetry of chitooligosaccharides modified by osmium(VI) tetramethylethylenediamine Author(s) Trefulka, Mojmír (BFU-R) RID, ORCID
Ostatná, Veronika (BFU-R) RID, ORCIDNumber of authors 2 Article number 107494 Source Title Bioelectrochemistry. - : Elsevier - ISSN 1567-5394
Roč. 133, č. 2020 (2020)Number of pages 6 s. Publication form Online - E Language eng - English Country CH - Switzerland Keywords ligand complexes ; nucleic-acids ; chitosan ; chitin ; oligosaccharides ; polysaccharides ; chemistry Subject RIV CE - Biochemistry OECD category Biochemistry and molecular biology R&D Projects GA18-18154S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support BFU-R - RVO:68081707 UT WOS 000531827700030 EID SCOPUS 85080060061 DOI https://doi.org/10.1016/j.bioelechem.2020.107494 Annotation Compounds 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. Workplace Institute of Biophysics Contact Jana Poláková, polakova@ibp.cz, Tel.: 541 517 244 Year of Publishing 2021 Electronic address https://www.sciencedirect.com/science/article/pii/S1567539419307790?via%3Dihub
Number of the records: 1