Comparison of mononuclear and dinuclear copper(ii) biomimetic complexes: spectroelectrochemical mechanistic study of their catalytic pathways
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F22%3A00561664" target="_blank" >RIV/61388955:_____/22:00561664 - isvavai.cz</a>
Alternative codes found
RIV/00216275:25310/22:39918877
Result on the web
<a href="https://hdl.handle.net/11104/0334189" target="_blank" >https://hdl.handle.net/11104/0334189</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d2dt01610a" target="_blank" >10.1039/d2dt01610a</a>
Alternative languages
Result language
angličtina
Original language name
Comparison of mononuclear and dinuclear copper(ii) biomimetic complexes: spectroelectrochemical mechanistic study of their catalytic pathways
Original language description
Two catecholase-like biomimetic catalysts, namely, two dinuclear copper complexes [Cu-2(L1)(OH)(H2O)(EtOH)][ClO4](2) (C1) and [Cu2Ac2O(L1)ClO4] (C2) with the 2,6-bis(4-methyl piperazin-1-yl-methyl)-4-formyl-phenoxy ligand (L1) together with the mononuclear complex Cu(ClO4)(2)(L2) (C3) containing ligand 1,2-(C5H4N-6-OCH3-2-CH=N)(2)CH2CH2 (L2), were synthesized. Their catalytic pathways were investigated and compared. The evaluation of the catalytic activity of compound C1 (and C2, C3) using the Michaelis-Menten model was represented by values of K-M = 272.93 (223.02, 1616) mu mol L-1 and V-max of 0.981 (1.617, 1.689) mu mol L-1 s(-1). The role of water content in the solvent is also discussed. The dinuclear complexes C1 and C2 were found to be more efficient catalysts than mononuclear complex C3. The mode of catalytic action was characterized via cyclic voltammetry, spectrophotometry, and UV-Vis spectroelectrochemistry. The catalytic mechanism of 3,5-di-tert butyl catechol oxidation in the presence of oxygen was proposed. The reaction circle was proved by the confirmation of the chemical reversibility of complex reduction. The advantage of the in situ spectroelectrochemical measurement enabled to control the reduction of quinone formed by the chemical reaction of catechol with oxygen in solution. At this step, the simultaneous change in the absorption spectrum indicated a change in the copper redox state of the catalyst.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)
Result continuities
Project
<a href="/en/project/GA19-03160S" target="_blank" >GA19-03160S: Electrochemical study on new artificial enzymes and their role in sensing of neurotransmitters</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Dalton Transactions
ISSN
1477-9226
e-ISSN
1477-9234
Volume of the periodical
51
Issue of the periodical within the volume
36
Country of publishing house
GB - UNITED KINGDOM
Number of pages
13
Pages from-to
13703-13715
UT code for WoS article
000843687500001
EID of the result in the Scopus database
2-s2.0-85137048906