Mechanisms of electron transfer between a styrylquinolinium dye and yeast in biofuel cell

Hubenova, Yolina; Bakalska, Rumyana; Hubenova, Eleonora; Mitov, Mario

doi:10.1016/j.bioelechem.2016.02.005

Cited by 12 publications

(6 citation statements)

References 27 publications

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“…We are experienced in the electrochemical characterization of two stilbazolium salts – the dye 4‐{(E)‐2‐[4‐(dimethylamino)naphthalene‐1‐yl]ethenyl}‐1‐methylquinolinium iodide (DANSQI) [5] and the dye (E)‐1‐ethyl‐4‐(2‐(4‐hydroxy‐naphthalene‐1‐yl)vinyl) quinolinium bromide [6] . We observed that the addition of DANSQI to Candida melibiosica 2491 yeast‐based biofuel cell in nano‐ to micro‐molar concentrations lead to an increase in the generated current.…”

Section: Introductionmentioning

confidence: 99%

“…[2] Of particular interest are dyes and stains used in biological labeling including microscopy, chemistry, histology, cytology, and medicine as fluorescent sensors and probes, and anticancer treatments such as photodynamic therapy [3] or as electron mediators in bioelectrochemical systems. [4][5][6] Along with the direct extracellular electron transfer (DET) mechanism, the facilitated or mediated extracellular electron transfer (MET), performed by cellular self-secreted molecules called endogenous mediators (EnMs) of electron transport is evolutionarily developed as an adaptation mechanism to the environmental conditions. EnMs are supposed to be mostly secondary metabolites but till today only a few EnMs are identified.…”

Section: Introductionmentioning

confidence: 99%

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Photophysical and Electrochemical Properties of Newly Synthesized Stilbazolium Dyes

et al. 2022

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In this study, the spectral and electrochemical properties of three newly synthesized stilbazolium dyes possessing an enlarged π-conjugated system were examined. The synthesis of the dyes was carried by Knoevenagel condensation of 1-butyl-4-methylquinolinium bromide as a common acceptor moiety precursor and different donor moiety precursors (2-hydroxynaphtaldehyde or 4-hydroxy-naphtaldehyde or 4-N, N-dimethylamino naphthaldehyde). The composition of the produced compounds was confirmed by 1 H-and 13 C nuclear magnetic resonance (NMR) spectroscopy, elemental analysis, and infrared (IR)-spectroscopy. Their properties including the solvatochrom-ism in different solvents were investigated by ultraviolet-visible (UV-Vis) and fluorescence spectroscopy. The electrochemical properties of the dyes' solutions in methanol were explored by cyclic voltammetry (CV), differential pulse voltammetry (DPV), and electrochemical impedance spectroscopy (EIS). The optical band-gap values as well as the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels of the dyes were estimated based on experimental data and compared. A putative mechanism of electrochemical oxidation/reduction of the investigated dyes was also proposed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photophysical and Electrochemical Properties of Newly Synthesized Stilbazolium Dyes

et al. 2022

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“…In previous reports, it was suggested that some electron mediators activate or accelerate oxidative phosphorylation in yeast cells by serving as electron acceptor for mitochondrial respiratory chain. − Moreover, our previous study suggested that EET via ox-pMFc, activated oxidative phosphorylation in yeast Saccharomyces cerevisiae cells . These reports seem to contradict the above results on MDA-MB-231 cells.…”

Section: Resultsmentioning

confidence: 98%

Cell-Membrane Permeable Redox Phospholipid Polymers Induce Apoptosis in MDA-MB-231 Human Breast Cancer Cells

et al. 2019

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Induction of oxidative stress is an effective approach to causing apoptotic death of cancer cells. Since oxidative stress is generally caused by an intracellular redox imbalance, altering the intracellular redox is a promising strategy toward the growth suppression of cancer cells. Here, we attempted to induce apoptosis in MDA-MB-231 human breast cancer cells by adding a cell-membrane permeable redox phospholipid polymer that can alter the intracellular redox. We found that apoptosis and the deactivation of oxidative phosphorylation were induced in the MDA-MB-231 cells in the presence of the oxidized form of the redox polymer. Remarkably, such phenomena were not observed in the presence of the reduced form of the redox polymer that cannot intercept metabolic electrons. These results indicate that the redox polymer that mediates extracellular electron transfer (EET) generates oxidative stress, leading to the apoptosis of the cancer cells.

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“…Examples of such artificial mediators are the dye neutral red, iron chelates, various phenazines, 4-napthoquinone, and thionine [9]. There are studies proposing other artificial mediators for electron transfer [11,12].…”

Section: Microbial Fuel Cellsmentioning

confidence: 99%

“…The energy generation of MFC is influenced by many factors, including the type of electrode material [30][31][32]. Studies on this subject were made by Hubenova et al [12] proposing styryl-quinolinum dye as molecular electrocatalyst and Mitov et al [33], who studied nickel-doped cathode. Another study was dedicated to nano-modified NiFe-and NiFeP-carbon felt as anode electrocatalysts in yeast-biofuel cell [34].…”

Section: Microbial Fuel Cellsmentioning

confidence: 99%

Bioelectrochemical Processes in Industrial Biotechnology

Beschkov¹,

Razkazova-Velkova²

2021

Energy Storage Battery Systems - Fundamentals and Applications

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Industrial fermentation and biological wastewater treatment are usually based on redox processes taking place in living cells and on enzyme processes. The practical application of these redox processes is usually associated with electricity generation in microbial fuel cells or process enhancement in microbial electrolysis cells. The microbial fuel cell approach leads to straightforward wastewater treatment with less energy demand. Additional advantages of these processes are the direct removal of various pollutants and the avoidance of addition of chemical agents with the resulting waste products of treatment as it is familiar with the traditional chemical methods. Another option for the use of bioelectrochemical processes in practice is the approach of microbial electrolysis cells. The application of electric field on fermentation or microbial wastewater treatment processes might result in different aspects: either in purely electrochemical processes on the electrodes or in different types of bioelectrochemical stimulation of enzyme activity in the living cells. These applications are associated with the combination of enzyme activity with electrochemical processes to produce or remove certain compounds rapidly at high concentrations with no additions of other chemicals. In the present chapter, both approaches (microbial fuel cells and microbial electrolysis cells) are presented and discussed. Some practical applications and experimental examples of such bioelectrochemical redox processes stimulated by constant electric field are demonstrated.

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Mechanisms of electron transfer between a styrylquinolinium dye and yeast in biofuel cell

Cited by 12 publications

References 27 publications

Photophysical and Electrochemical Properties of Newly Synthesized Stilbazolium Dyes

Photophysical and Electrochemical Properties of Newly Synthesized Stilbazolium Dyes

Cell-Membrane Permeable Redox Phospholipid Polymers Induce Apoptosis in MDA-MB-231 Human Breast Cancer Cells

Bioelectrochemical Processes in Industrial Biotechnology

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