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

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, ORCID}
Number 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	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