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  • A rod-like hexanuclear nickel cluster based on a bi(pyrazole-alcohol) ligand: structure, electrospray ionization mass spectrometry, magnetism and photocurrent response [Elektronski vir]
    Sheng, Kai ...
    The reaction of one equivalent of 1,2-bis-(3,5-dimethylpyrazol-1-yl)-ethane-1,2-diol (▫${\rm H_2}$▫bdped) with two equivalents of ▫${\rm Ni(OAc)_2 \cdot 4H_2O}$▫ afforded a hexanuclear nickel(II) ... cluster ▫${\rm [Ni_6(bdped)_2(OAc)_8(H_2O)_4] \cdot 6EtOH (\mathbf{SD/Ni6a})}$▫. The single-crystal X-ray diffraction (SCXRD) structural analysis reveals the one-dimensional zig-zag arrangement of six Ni(II) atoms that are in a slightly distorted octahedral coordination geometry. Two bdped2- ligands show folded configurations to coordinate to Ni(II) atoms. Interestingly, the multi intra- and inter-cluster hydrogen bonds in and between the clusters could be favorable for the stability of the cluster and the cluster packing in the crystal. Electrospray ionization mass spectrometry (ESI-MS) reveals that the ▫${\rm Ni_6}$▫ core structure keeps intact in solution and coexists with some fragments of ▫${\rm Ni_4}$▫ and ▫${\rm Ni_5}$▫ species. This fragmentation should be occurring in solution instead of the gas phase as indicated by in-source voltage dependent ESI-MS. Furthermore, ▫$\mathbf{SD/Ni6a}$▫ displayed ferromagnetic exchange behavior arising from the interactions between the nickel(II) centers. UV-vis absorption presents typical Ni(II) species with octahedral coordination geometry and the photocurrent measurement gave fast and stable responses upon visible light illumination.
    Vir: New journal of chemistry [Elektronski vir]. - ISSN 1369-9261 (Vol. 44, iss. 17, May. 2020, str. 7152-7157)
    Vrsta gradiva - e-članek
    Leto - 2020
    Jezik - angleški
    COBISS.SI-ID - 15509763

    Povezava(-e):

    https://doi.org/10.1039/D0NJ00959H
    DOI

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