期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 41, 页码 13618-13623出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201807927
关键词
Layered compounds; Polychalcogenides; Redox chemistry; Solid-state reactions; Topochemistry
资金
- JSPS
- CNRS
- Region Pays de la Loire
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 (Q(2))(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 La2O2S2, Ba2F2S2, and LaSe2. Therefore, this work opens up a new synthetic strategy to design layered transition metal compounds from precursors containing polyanionic redox centers.
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