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Sasaki, S., Caldes, M. T., Guillot-Deudon, C., Braems, I., Steciuk, G., Palatinus, L., Gautron, E., Frapper, G., Janod, E., Corraze, B., Jobic, S. & Cario, L. (2021) Design of metastable oxychalcogenide phases by topochemical (de)intercalation of sulfur in La2O2S2. Nat Commun, 12 3605. 
Added by: Richard Baschera (2021-09-27 08:31:54)   Last edited by: Richard Baschera (2021-09-27 08:48:12)
Type de référence: Article
DOI: 10.1038/s41467-021-23677-w
Numéro d'identification (ISBN etc.): 2041-1723
Clé BibTeX: Sasaki2021
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Créateurs: Braems, Caldes, Cario, Corraze, Frapper, Gautron, Guillot-Deudon, Janod, Jobic, Palatinus, Sasaki, Steciuk
Collection: Nat Commun
Consultations : 14/151
Indice de consultation : 7%
Indice de popularité : 1.75%
Liens URLs     http://www.nature. ... s41467-021-23677-w
Designing and synthesising new metastable compounds is a major challenge of today’s material science. While exploration of metastable oxides has seen decades-long advancement thanks to the topochemical deintercalation of oxygen as recently spotlighted with the discovery of nickelate superconductor, such unique synthetic pathway has not yet been found for chalcogenide compounds. Here we combine an original soft chemistry approach, structure prediction calculations and advanced electron microscopy techniques to demonstrate the topochemical deintercalation/reintercalation of sulfur in a layered oxychalcogenide leading to the design of novel metastable phases. We demonstrate that La2O2S2 may react with monovalent metals to produce sulfur-deintercalated metastable phases La2O2S1.5 and oA-La2O2S whose lamellar structures were predicted thanks to an evolutionary structure-prediction algorithm. This study paves the way to unexplored topochemistry of mobile chalcogen anions.

Great progress has been made in topochemistry of mobile oxygen anions, but metastable compounds have not yet been achieved by deintercalation of sulfur anions. Here, the authors prepare metastable oxychalcogenide phases by taking advantage of redox-reactive sulfur dimers embedded in a layered oxysulfide.

Bandiera_abtest: a Cc_license_type: cc_by Cg_type: Nature Research Journals Number: 1 Primary_atype: Research Publisher: Nature Publishing Group Subject_term: Solid-state chemistry;Chemical synthesis;Theoretical chemistry Subject_term_id: solid-state-chemistry;synthesis;theoretical-chemistry
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