Electrochemical Valorization of Lignocellulosic Biomass Amination of Furfural and 5-Hydroxymethylfurfural
Donkeng Dazie, Joel; Koláčná, Lucie; Urban, Jiří; Lamač, Martin; Ludvík, Jiří
2024 - English
Furfural (FF) and 5-hydroxymethylfurfural (HMF) isolated from waste lignocellulosic biomass represent renewable sources. The present contribution deals with the transformation of FF and HMF into furfuryl amines which are important precursors namely for pharmaceutical synthesis. First, FF and HMF underwent condensation reactions with various amines which were electrochemically monitored to optimize the process. The resulting Schiff bases were identified by NMR and subsequently electrochemically reduced in basic media. The vicinal diamine (aminopinacol) was the main product besides the expected furfuryl amines. This reaction is a contribution to green synthesis because it was performed electrochemically, in water, and without any metallic catalysts.
Keywords:
furfural; 5-hydroxymethylfurfural; (di)amines
Available on request at various institutes of the ASCR
Electrochemical Valorization of Lignocellulosic Biomass Amination of Furfural and 5-Hydroxymethylfurfural
Furfural (FF) and 5-hydroxymethylfurfural (HMF) isolated from waste lignocellulosic biomass represent renewable sources. The present contribution deals with the transformation of FF and HMF into ...
Electrochemical Properties of Newly Synthesized Selaginpulvilins
Dostálová, L.; Sokolová, Romana; Schwarzová-Pecková, K.; Rýček, L.
2024 - English
The electrochemical properties of newly synthesized selaginpulvilin were investigated by cyclic voltammetry and UV-Vis spectroelectrochemistry. The subject of the study were two\nselaginpulvilins differing in the presence of a hydroxyl group in the media of 0.1 mol L-1 tetrabutylammonium hexafluorophosphate as supporting electrolyte in anhydrous acetonitrile. Both\ncompounds provided an oxidative signal in the positive region until +2.0 V.
Keywords:
oxidation; cyclic voltammetry; selaginpulvilins
Available on request at various institutes of the ASCR
Electrochemical Properties of Newly Synthesized Selaginpulvilins
The electrochemical properties of newly synthesized selaginpulvilin were investigated by cyclic voltammetry and UV-Vis spectroelectrochemistry. The subject of the study were two\nselaginpulvilins ...
3D-printed Electrodes with Nearly Ideal Charge Transfer Characteristics
Vaněčková, Eva; Sebechlebská, Táňa; Kolivoška, Viliam
2024 - English
3D printing is an outstanding manufacturing tool for prototyping customized designs at reduced time and costs, having found applications in fields such as medicine or the automotive industry. The development of printable electrically conductive composite materials brought a revolution to electrochemistry, with 3D-printed electrodes being intensively studied from the viewpoint of\nanalytical performance and stability. However, it is often reported that 3D-printed electrodes have poor charge transfer characteristics, typically due to limited exposure of the electrically conductive phase at the composite surface to the surrounding solution. In this work, we devise and apply simple electrochemical activation procedures that lead to a significant improvement of charge transfer characteristics of 3D printed electrodes.
Keywords:
three-dimensional printing; electrochemistry; electrodes
Available on request at various institutes of the ASCR
3D-printed Electrodes with Nearly Ideal Charge Transfer Characteristics
3D printing is an outstanding manufacturing tool for prototyping customized designs at reduced time and costs, having found applications in fields such as medicine or the automotive industry. The ...
Algorithmic thinking and its development in primary school
2024 -
Keywords:
Rámcový vzdělávací program; RVP; revize Informatiky; rozvoj algoritmického myšlení; ŠVP ZV
Available in the ZČU Library.
Algorithmic thinking and its development in primary school
Modular tool for teaching physics and technical education
2024 -
Keywords:
technická výchova; fyzika; modulární; pomůcka; 3D tisk; mechanika; síla; vztlaková síla; Flettnerův rotor; měření; pohyb
Available in the ZČU Library.
Modular tool for teaching physics and technical education
Plinko
2024 -
Keywords:
Plinko; mezioborovost; demonstrační pomůcka; technika
Available in the ZČU Library.
Plinko
Set of games
2024 -
Keywords:
vlastnosti dřeva; hry; zpracování dřeva; aktivita; nízký rozpočet
Available in the ZČU Library.
Set of games
A web application to support the teaching of algorithmization
2024 -
Keywords:
programování; algoritmizace; informatické myšlení; gamifikace; hra se vzdělávacím obsahem
Available in the ZČU Library.
A web application to support the teaching of algorithmization
Didactic model of DC electric motor
2024 -
Keywords:
demonstrační model; didaktická pomůcka; stejnosměrný motor
Available in the ZČU Library.
Didactic model of DC electric motor
Reclaiming childhood joy: an adventure in the world of escape room
2024 -
Keywords:
úniková místnost; znovu získat dětskou radost
Available in the ZČU Library.
Reclaiming childhood joy: an adventure in the world of escape room
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