Ni II 36 ‐Containing 54‐Tungsto‐6‐Silicate: Synthesis, Structure, Magnetic and Electrochemical Studies - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Chemistry - A European Journal Année : 2021

Ni II 36 ‐Containing 54‐Tungsto‐6‐Silicate: Synthesis, Structure, Magnetic and Electrochemical Studies

Joydeb Goura
  • Fonction : Auteur
Bassem S. Bassil
  • Fonction : Auteur
Xiang Ma
Ananthu Rajan
  • Fonction : Auteur
Eufemio Moreno‐pineda
Jürgen Schnack
  • Fonction : Auteur
Masooma Ibrahim
Annie K. Powell
  • Fonction : Auteur
Jingjing Wang
Ulrich Kortz
  • Fonction : Auteur

Résumé

The 36-NiII-containing 54-tungsto-6-silicate, [Ni36(OH)18(H2O)36(SiW9O34)6]6- (Ni36) was synthesized by a simple one-pot reaction of the Ni2-pivalate complex [Ni2(μ-OH2)(O2CCMe3)4(HO2CCMe3)4] with the trilacunary [SiW9O34]10- polyanion precursor in water and structurally characterized by a multitude of physicochemical techniques including single-crystal XRD, FT-IR, TGA, elemental analysis, magnetic and electrochemical studies. Polyanion Ni36 comprises six equivalent {NiII6SiW9} units which are linked by Ni-O-W’ bridges forming a macrocyclic assembly. Magnetic studies demonstrated that the {Ni6} building blocks in Ni36 remain magnetically intact while forming a hexagonal ring with antiferromagnetic exchange interactions between adjacent {Ni6} units. Electrochemical studies indicated that the first reduction is reversible and associated with the WVI/V couple, whereas the second reduction is irreversible and associated to the couple NiII/0.
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Dates et versions

hal-03594805 , version 1 (02-03-2022)

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Joydeb Goura, Bassem S. Bassil, Xiang Ma, Ananthu Rajan, Eufemio Moreno‐pineda, et al.. Ni II 36 ‐Containing 54‐Tungsto‐6‐Silicate: Synthesis, Structure, Magnetic and Electrochemical Studies. Chemistry - A European Journal, 2021, 27 (61), pp.15081-15085. ⟨10.1002/chem.202102973⟩. ⟨hal-03594805⟩
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