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  • Influence of bridging and chelating co-ligands on the distinct single-molecule magnetic behaviours in ZnDy complexes [Elektronski vir]
    Panja, Anangamohan ...
    Four new heterometallic ZnDy complexes, [ZnDy(L)(NO3)3(py)]CH2Cl2 (1) (py stands for pyridine), [ZnDy(L)(m-OAc)(OAc)2]3H2O (2), [ZnDy(L)(m-OAc)(OAc)(NO3)] (3), and [ZnDy(L)(m-piv)(piv)2][ZnDy(L) ... (m-piv)(piv)(OAc)]1.5H2O (4), have been synthesized from a methyl substituted o-vanillin based compartmental Schiff base ligand, N,N0 -bis(3-methoxy-5-methylsalicylidene)-1,2-phenylenediamine (H2L), in association with various secondary co-ligands like acetate (OAc), nitrate and pivalate (piv), and magneto-structurally characterised. They possess a nearly identical [Zn(II)–Dy(III)] core, bridged by the phenoxo-O atoms of the compartmental Schiff base ligand. Magnetic studies revealed the distinct singlemolecule magnetic (SMM) behaviours through single to multiple relaxation channels, in which 1, 2 and 4 can display slow relaxation of magnetisation at a zero dc field, the performance of which can be further improved by applying a magnetic field at the expense of the reduction of under barrier relaxation processes, while 3 shows only field-induced weaker slow magnetic relaxation behaviours. Ab initio calculations were performed for the in-depth understanding of the magnetic dynamics in these complexes. The difference in the magnetic behaviours of the four complexes can be ascribed to the effect of bridging/chelating co-ligands in these complexes. Therefore, the present report highlights that the magnetic anisotropy is sensitive to the bridging/chelating co-ligands used, leading to the distinct magnetic dynamics in these systems.
    Vir: New journal of chemistry [Elektronski vir]. - ISSN 1369-9261 (Vol. 46, iss. 39, art. 18751, 2022, str. 18751-18763)
    Vrsta gradiva - e-članek ; neleposlovje za odrasle
    Leto - 2022
    Jezik - angleški
    COBISS.SI-ID - 137343491

    Povezava(-e):

    https://pubs.rsc.org/en/content/articlelanding/2022/NJ/D2NJ03793A
    Repozitorij Univerze v Ljubljani – RUL
    DOI

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