Results
Title

Ni<sup>II</sup><sub>36</sub>‐Containing 54‐Tungsto‐6‐Silicate: Synthesis, Structure, Magnetic and Electrochemical Studies.

Authors

Goura, Joydeb; Bassil, Bassem S.; Ma, Xiang; Rajan, Ananthu; Moreno‐Pineda, Eufemio; Schnack, Jürgen; Ibrahim, Masooma; Powell, Annie K.; Ruben, Mario; Wang, Jingjing; Ruhlmann, Laurent; Kortz, Ulrich

Abstract

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, FTIR, 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 demonstrate 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 indicate that the first reduction is reversible and associated with the WVI/V couple, whereas the second reduction is irreversible attributed to the NiII/0 couple.

Subjects

ELEMENTAL analysis; POLYANIONS; MAGNETIC properties

Publication

Chemistry - A European Journal, 2021, Vol 27, Issue 61, p15080

ISSN

0947-6539

Publication type

Academic Journal

DOI

10.1002/chem.202102973