Bis(2,2'-bipyridil)Copper(II) Chloride Complex: Tyrosinase Biomimetic Catalyst or Redox Mediator?

In this article, construction of amperometric sensor(s) based on screen-printed carbon electrodes covered by thin layers of two types of carbon nanomaterials serving as amplifiers, and containing [Cu(bipy) Cl]Cl∙5H O complex is reported. Their performance and biomimetic activity towards two selected...

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Bibliographic Details
Published in:Materials 2020-12, Vol.14 (1), p.113
Main Authors: Sýs, Milan, Mukherjee, Atripan, Jashari, Granit, Adam, Vojtěch, Ashrafi, Amir M, Novák, Miroslav, Richtera, Lukáš
Format: Article
Language:English
Subjects:
Biomimetics
Carbon
Catalysts
Catalytic activity
Chloride
Copper
Copper chloride
Dopamine
Electrical measurement
Electrodes
Enzymes
Flow injection analysis
Flow velocity
Graphene
Hydrogen peroxide
Nanomaterials
Neurotransmitters
Oxidation
Potassium
Sensors
Serotonin
Silver
Thin films
Tyrosinase
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Summary:In this article, construction of amperometric sensor(s) based on screen-printed carbon electrodes covered by thin layers of two types of carbon nanomaterials serving as amplifiers, and containing [Cu(bipy) Cl]Cl∙5H O complex is reported. Their performance and biomimetic activity towards two selected neurotransmitters (dopamine and serotonin) was studied mainly using flow injection analysis (FIA). The important parameters of FIA such as working potential, flow rate, and pH were optimized. The mechanism of the catalytic activity is explained and experimentally confirmed. It reveals that presence of hydrogen peroxide plays a crucial role which leads to answer the title question: can presented complex really be considered as a tyrosinase biomimetic catalyst or only as a redox mediator?
ISSN:1996-1944
1996-1944
DOI:10.3390/ma14010113