Heteronuclear Ni(ii)-Ln(iii) (Ln = La, Pr, Tb, Dy) complexes: synthesis and single-molecule magnet behaviour

Dalton Transactions : an International Journal of Inorganic Chemistry
Apoorva UpadhyayMaheswaran Shanmugam

Abstract

The reaction of hydrated nickel(II) salts (chloride or nitrate) and hydrated lanthanide nitrate salts with the Schiff base ligand 2-methoxy-6-[(E)-phenyliminomethyl] phenol (HL) in methanol resulted in the isolation of three isostructural linear heterometallic trinuclear complexes and a heterometallic tetranuclear complex. The molecular structures of these complexes were determined via single crystal X-ray diffraction revealing molecular structures of formulae [Ni2La(L-)6](NO3)0.55(OH)0.45 (1), [Ni2Pr(L-)6](NO3)0.48(OH)0.52 (2), [Ni2Tb(L-)6](NO3)0.5(Cl)0.5 (3) and [Ni2Dy2(L-2(o-vanillin)2(CO3)2(NO3)2(MeOH)2] (4). Structural analysis for 1-3 reveals that the lanthanide ion is sandwiched between two Ni(II) ions and the Ni⋯Ln⋯Ni metallic core displays a linear arrangement, with an average ∠Ni⋯Ln⋯Ni bond angle of 179.7°. Analysis of 4 reveals the metal ions are arranged such that two Ni-Dy subunits are bridged by two carbonate ligands via the Dy sites. Direct current magnetic susceptibility measurements for complexes 1-4 reveal that the Ni(II) ions are coupled ferromagnetically with the Tb(III) (3) and Dy(III) (4) ions, and antiferromagnetically with the Pr(III) ion (2). For complex 1 a long range intramolecular ferromagnetic inter...Continue Reading

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Citations

Mar 23, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·A AmjadL Sorace
Jan 20, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Shiqing WangRichard A Jones
Oct 26, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Y JiangM Murugesu
Dec 8, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Kousik GhoshShouvik Chattopadhyay
Jul 23, 2019·Chemistry, an Asian Journal·Atanu DeyVadapalli Chandrasekhar
May 16, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Anastasia N GeorgopoulouCatherine P Raptopoulou
Sep 15, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Lin JiangShiping Yan

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