Wells-Dawson cages as molecular refrigerants

Eufemio Moreno Pineda, Floriana Tuna, Yan Zhen Zheng, Richard E P Winpenny, Eric J L McInnes

    Research output: Contribution to journalArticlepeer-review


    Five clusters with the general formula [Ni6Gd 6(μ3-OH)2(μ2-OAc) 2(O3PR)6(O2CtBu) 16], where R = methyl (1), phenyl (2), n-hexyl (3), benzyl (4), n-octyl (5), have been prepared. All of the clusters have a {Ni 6Gd6P6} core that can be related to the Wells-Dawson ion. We have also prepared analogues where the gadolinium is replaced with diamagnetic yttrium: [Ni6Y6(μ 3-OH)2(μ2-OAc)2(O 3PR)6(O2CtBu)16] (R = methyl (6), n-hexyl (7), benzyl (8), n-octyl (9)), allowing the magnetic exchange within the {Ni3} units to be analyzed by modeling as the sum of two noninteracting isosceles triangles. The variation in the magnetic entropy changes for magnetization (-ΔSM) among compounds 1-5 could be attributed not only to the molecular weight of the compounds but also to intramolecular magnetic interactions. © 2013 American Chemical Society.
    Original languageEnglish
    Pages (from-to)13702-13707
    Number of pages5
    JournalInorganic Chemistry: including bioinorganic chemistry
    Issue number23
    Publication statusPublished - 2 Dec 2013


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