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A Topochemical Approach to Synthesize Layered Materials Based on the Redox Reactivity of Anionic Chalcogen Dimers
Author(s) -
Sasaki Shunsuke,
Driss Dalel,
Grange Elodie,
Mevellec JeanYves,
Caldes Maria Teresa,
GuillotDeudon Catherine,
Cadars Sylvian,
Corraze Benoît,
Janod Etienne,
Jobic Stéphane,
Cario Laurent
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201807927
Subject(s) - chalcogen , redox , reactivity (psychology) , transition metal , chemistry , oxidation state , metal , materials science , inorganic chemistry , crystallography , catalysis , organic chemistry , medicine , alternative medicine , pathology
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 La 2 O 2 S 2 , Ba 2 F 2 S 2 , and LaSe 2 . Therefore, this work opens up a new synthetic strategy to design layered transition metal compounds from precursors containing polyanionic redox centers.