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  • Carboxylic acid-tuned nickel(ii) clusters: syntheses, structures, solution behaviours and magnetic properties [Elektronski vir]
    Su, Yan-Min ...
    Three novel cicada-like nickel(II) clusters, formulated as [Ni6(bdped)2(mba)6(Hdmpz)2(NO3)2(H2O)2]· 4MeCN (SD/Ni6b), [Ni5(bdped)2(tca)6(Hdmpz)(MeOH)2(H2O)]·MeOH (SD/Ni5a) and [Ni4(Hbdped)2- ... (ba)4(Hdmpz)2]·2NO3·2MeCN (SD/Ni4a), were obtained by tuning the auxiliary carboxylic acids, where H2bdped = 1,2-bis-(3,5-dimethylpyrazol-1-yl)-ethane-1,2-diol; Hmba = 2-methylbenzoic acid; Hdmpz = 3,5-dimethyl-1H-pyrazole; Htca = 3-thiophenecarboxylic acid; and Hba = benzoic acid. The structures of SD/Ni6b, SD/Ni5a and SD/Ni4a are built from a central Ni4O4 opened cube, appending two to zero NiNO5 octahedra. The solution behaviours of SD/Ni6b, SD/Ni5a and SD/Ni4a were studied in detail via an ESI-MS technique and their solution stabilities were confirmed. Magnetic analysis indicated the presence of Ising-type anisotropy: D = −13, −10, and −11 cm−1 for SD/Ni6b, SD/Ni5a, and SD/Ni4a, respectively; moreover, dominantly ferromagnetic interactions were found between magnetic centers: J1 = 6.5 cm−1 , J2 = −0.44 cm−1 and J1 = 5.9 cm−1 , J2 = 2.6 cm−1 for SD/Ni5a and SD/Ni4a, respectively. Besides, the photocurrent signals were observed and they reached the maximum very quickly for these three nickel(II) clusters and then their current intensities remained almost constant, which provide a possibility to be used for light-harvesting and photo-related catalysis.
    Source: Dalton transactions [Elektronski vir]. - ISSN 1477-9234 (Vol. 50, iss. 12, March 2021, 4355-4362)
    Type of material - e-article ; adult, serious
    Publish date - 2021
    Language - english
    COBISS.SI-ID - 126564099

    Link(s):

    https://pubs.rsc.org/en/content/articlelanding/2021/DT/D1DT00165E
    https://repozitorij.uni-lj.si/admin/GradivoOsnovno.php?id=142190
    Repository of the University of Ljubljana – RUL
    DOI

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