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Polymorphic Control of CsGaE2 (E = S, Se) Using Diorganyl Dichalcogenide Precursors

Journal Article · · Inorganic Chemistry
Diorganyl dichalcogenides (R–E–E–R; R = organyl, E = S, Se, Te) are widely employed for the polymorphic control of diamond-like crystal structures owing to their tunable C–E bond reactivity. In this work, we extend their application to non-close-packed alkali metal-based chalcogenides by demonstrating the selective synthesis of CsGaE2 (E = S, Se) polymorphs. Weaker C–E bonds or higher temperatures promote the formation of the thermodynamically stable mC64 phases, while stronger C–E bonds or lower temperatures allow for the isolation of the metastable mC16 phases. Furthermore, heat-treatment studies reveal the pronounced metastability of CsGaSe2-mC16 particles and the irreversible phase transition of CsGaS2 analogous to its bulk counterpart.
Research Organization:
University of Southern California, Los Angeles, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0006812
OSTI ID:
3015137
Alternate ID(s):
OSTI ID: 3013926
Journal Information:
Inorganic Chemistry, Journal Name: Inorganic Chemistry Journal Issue: 44 Vol. 64; ISSN 0020-1669; ISSN 1520-510X
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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