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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

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • 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

  • 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