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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 Nickel Polyoxometalates Structure elucidation |
Issue Date: | 2021 | Part of: | Chemistry : a European journal | Volume: | 27 | Issue: | 61 | Start page: | 15081 | End page: | 15084 | Abstract: | 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. |
URI: | https://scholarhub.balamand.edu.lb/handle/uob/5344 | 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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