Entrapment of a Pseudo-Tetrahedral Co-II Center by Thioether Sulfur Bound {Co-2(mu-L)} Fragments: Synthesis, Field-Induced Single-Ion Magnetism and Catechol Oxidase Mimicking Activity
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F19%3A73596424" target="_blank" >RIV/61989592:15310/19:73596424 - isvavai.cz</a>
Result on the web
<a href="https://onlinelibrary.wiley.com/doi/full/10.1002/asia.201901109" target="_blank" >https://onlinelibrary.wiley.com/doi/full/10.1002/asia.201901109</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/asia.201901109" target="_blank" >10.1002/asia.201901109</a>
Alternative languages
Result language
angličtina
Original language name
Entrapment of a Pseudo-Tetrahedral Co-II Center by Thioether Sulfur Bound {Co-2(mu-L)} Fragments: Synthesis, Field-Induced Single-Ion Magnetism and Catechol Oxidase Mimicking Activity
Original language description
Simultaneous incorporation of both Co-II and Co-III ions within a new thioether S-bearing phenol-based ligand system, H3L (2,6-bis-[{2-(2-hydroxyethylthio)ethylimino}methyl]-4-methylphenol) formed [Co-5] aggregates [(CoCo4L2)-Co-II-L-III(mu-OH)(2)(mu(1,3)-O2CCH3)(2)](ClO4)(4) H2O (1) and [(CoCo4L2)-Co-II-L-III(mu-OH)(2)(mu(1,3)-O2CC2H5)(2)](ClO4)(4)H2O (2). The magnetic studies revealed axial zero-field splitting (ZFS) parameter, D/hc=-23.6 and -24.3 cm(-1), and E/D=0.03 and 0.00, respectively for 1 and 2. Dynamic magnetic data confirmed the complexes as SIMs with U-eff/k(B)=30 K (1) and 33 K (2), and tau(0)=9.1x10(-8) s (1), and 4.3x10(-8) s (2). The larger atomic radius of S compared to N gave rise to less variation in the distortion of tetrahedral geometry around central Co-II centers, thus affecting the D and U-eff/k(B) values. Theoretical studies also support the experimental findings and reveal the origin of the anisotropy parameters. In solutions, both 1 and 2 which produce {Co-2(III)(mu-L)} units, display solvent-dependent catechol oxidation behavior toward 3,5-di-tert-butylcatechol in air. The presence of an adjacent Co-III ion tends to assist the electron transfer from the substrate to the metal ion center, enhancing the catalytic oxidation rate.
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
10402 - Inorganic and nuclear chemistry
Result continuities
Project
<a href="/en/project/LO1305" target="_blank" >LO1305: Development of the center of advanced technologies and materials</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Chemistry-An Asian Journal
ISSN
1861-4728
e-ISSN
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Volume of the periodical
14
Issue of the periodical within the volume
21
Country of publishing house
DE - GERMANY
Number of pages
17
Pages from-to
3898-3914
UT code for WoS article
000495080600019
EID of the result in the Scopus database
2-s2.0-85074364888