Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 48, Pages 14952-14957Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201608019
Keywords
Ag2S; photoinduced synthesis; quantum dots; silver; thiolate intermediates
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Funding
- Ministry of Science and Technology of China [2014CB239402, 2013CB834505]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB17030200]
- National Natural Science Foundation of China [21401206, 51322213, 21301183, 51572270, 21401207]
- Beijing Natural Science Foundation [2152033, 2154058]
- U.S. National Science Foundation [CHE-1308587]
- Department of Energy [DE-SC0002247]
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Photoinduced syntheses offer significant advantages over conventional thermal strategies, including improved control over reaction kinetics and low synthesis temperatures, affording nanoparticles with nontrivial and thermodynamically unstable structures. However, the photoinduced syntheses of non-metallic nanocrystalline products (such as metal sulfides) have not yet been reported. Herein, we demonstrate the first photoinduced synthesis of ultrafine (sub-2 nm) Ag2S quantum dots (QDs) from Ag nanoparticles at 10 degrees C. By thorough investigation of the mechanism for the transformation, a fundamental link was established between the intrinsic structures of the molecular intermediates and the final Ag2S products. Our results confirm the viability of low-temperature photochemical approaches in metal sulfide synthesis, and demonstrate a new rule which could be followed in it.
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