Design of metastable oxychalcogenide phases by topochemical (de)intercalation of sulfur in La₂O₂S₂.

ABSTRACT: 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 metastab

SUBMITTER: Sasaki S 

PROVIDER: S-EPMC8203606 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature