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Title: Tunable Room-Temperature Synthesis of Coinage Metal Chalcogenide Nanocrystals from N -Heterocyclic Carbene Synthons

Journal Article · · Chemistry of Materials

We present a new toolset of precursors for semiconductor nanocrystal synthesis, N-heterocyclic carbene (NHC)-metal halide complexes, which enables a tunable molecular platform for the preparation of coinage metal chalcogenide quantum dots (QDs). Phase-pure and highly monodisperse coinage metal chalcogenide (Ag2E, Cu2–xE; E = S, Se) QDs are readily synthesized from the direct reaction of an NHC-MBr synthon (where M = Ag, Cu) with alkylsilyl chalcogenide reagents at room temperature. We demonstrate that the size of the resulting QDs is well tailored by the electron-donating ability of the L-type NHC ligands, which are further confirmed to be the only organic capping ligands on the QD surface, imparting excellent colloidal stability. Local superstructures of the NHC-capped Ag2S QDs are observed by TEM, further demonstrating their potential for synthesizing monodisperse ensembles and mediating self-assembly.

Research Organization:
Univ. of Southern California, Los Angeles, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0006812; FG02-11ER46826
OSTI ID:
1406130
Alternate ID(s):
OSTI ID: 1582643
Journal Information:
Chemistry of Materials, Vol. 29, Issue 3; ISSN 0897-4756
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 23 works
Citation information provided by
Web of Science

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  • Anderson, Nicholas C.; Hendricks, Mark P.; Choi, Joshua J.
  • Journal of the American Chemical Society, Vol. 135, Issue 49, p. 18536-18548 https://doi.org/10.1021/ja4086758
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