A Topochemical Approach to Synthesize Layered Materials Based on the Redox Reactivity of Anionic Chalcogen Dimers. (13th September 2018)

• Record Type: Journal Article
• Authors: Sasaki, Shunsuke; Driss, Dalel; Grange, Elodie; Mevellec, Jean‐Yves; Caldes, Maria Teresa; Guillot‐Deudon, Catherine; Cadars, Sylvian; Corraze, Benoît; Janod, Etienne; Jobic, Stéphane; Cario, Laurent
• Is Part Of: Angewandte Chemie. Volume 130:Number 41(2018)
• Page Start: 13806
• Page End: 13811
• Publication Date: 2018-09-13
• Subjects: Festkörperreaktionen -- Polychalkogenide -- Redoxchemie -- Schichtverbindungen -- Topochemie; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201807927
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Layered transition metal compounds represent a major playground to explore unconventional electric or magnetic properties. In that framework, topochemical approaches that mostly preserve the topology of layered reactants have been intensively investigated to tune properties and/or design new materials. Topochemical reactions often involve the insertion or deinsertion of a chemical element accompanied by a change of oxidation state of the cations only. Conversely, cases where anions play the role of redox centers are very scarce. Here we show that the insertion of copper into two dimensional precursors containing chalcogen dimers (Q2 ) 2− (Q=S, Se) can produce layered materials with extended (CuQ) sheets. The reality of this topochemical reaction is demonstrated here for different pristine materials, namely La2 O2 S2, Ba2 F2 S2, and LaSe2 . Therefore, this work opens up a new synthetic strategy to design layered transition metal compounds from precursors containing polyanionic redox centers.