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Title: NiII 36 -Containing 54-Tungsto-6-Silicate: Synthesis, Structure, Magnetic and Electrochemical Studies
Authors: Goura, Joydeb
Bassil, Bassem 
Ma, Xiang
Rajan, Ananthu
Moreno-Pineda, Eufemio
Schnack, Jürgen
Ibrahim, Masooma
Powell, Annie K
Ruben, Mario
Wang, Jingjing
Ruhlmann, Laurent
Kortz, Ulrich
Affiliations: Department of Chemistry 
Keywords: Electrochemistry
Magnetic properties
Structure elucidation
Issue Date: 2021
Part of: Chemistry : a European journal
Volume: 27
Issue: 61
Start page: 15081
End page: 15084
The 36-NiII -containing 54-tungsto-6-silicate, [Ni36 (OH)18 (H2 O)36 (SiW9 O34 )6 ]6- (Ni36 ) was synthesized by a simple one-pot reaction of the Ni2 -pivalate complex [Ni2 (μ-OH2 )(O2 CCMe3 )4 (HO2 CCMe3 )4 ] with the trilacunary [SiW9 O34 ]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 {NiII 6 SiW9 } 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.
ISSN: 09476539
DOI: 10.1002/chem.202102973
Ezproxy URL: Link to full text
Type: Journal Article
Appears in Collections:Department of Chemistry

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