A tris-oxovanadium pyrogallate complex: synthesis, structure, and magnetic and electronic properties. Issue 38 (2nd September 2021)

• Record Type: Journal Article
• Authors: Mkhadder, Hassan; Denis, Morgane; Giménez-Marqués, Mónica; Cañón-Mancisidor, Walter; Humbert, Bernard; Deunf, Elise; Poizot, Philippe; Devic, Thomas
• Is Part Of: Dalton transactions. Volume 50:Issue 38(2021)
• Page Start: 13399
• Page End: 13406
• Publication Date: 2021-09-02
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d1dt01990b
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : A robust tris-oxovanadium tris-anion showing interesting electrochemical and magnetic properties due to the combination of V(iv ) with a non-innocent pyrogallate ligand. Abstract : With the aim of identifying new cation–phenolate complexes, we herein investigated the reactivity of pyrogallol (H3 pgal) with vanadium salts. A trimetallic anionic complex was identified, and found to be formed under a broad set of reaction conditions. This complex, with the formula V3 O3 (pgal)3 3−, consists of three oxovanadium(iv ) units connected together by three pyrogallate ligands to afford a bowl-shaped species presenting a pseudo 3-fold symmetry axis. Its crystal structure is reported, as well as its characterisation by a broad set of techniques, including powder X-ray diffraction, thermogravimetric analysis, infrared and Raman spectroscopy, and solid state UV-visible diffuse reflectance. Its redox activity both in solution and in the solid state is described, together with its magnetic behavior. Finally, the relevance of this trimetallic unit in the field of phenolic-based biocoatings and Metal Organic Framework (MOF) synthesis is briefly discussed.