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- W2316563566 abstract "Formation of CdS nanocrystals in the classic approach (with octadecene (ODE) as the solvent and elemental sulfur and cadmium carboxylate as the precursors) was found to be kinetically dependent on reduction of elemental sulfur by ODE, which possessed a critical temperature (∼180 °C). After elemental sulfur was activated by ODE, the formation reaction of CdS followed closely. 2-tetradecylthiophene from the activation of S by ODE and fatty acids from the formation reaction of CdS were found to be the only soluble side products. The overall reaction stoichiometry further suggested that oxidation of each ODE molecule generated two molecules of H2S, which in turn reacted with two molecules of cadmium carboxylate molecules to yield two CdS molecular units and four molecules of fatty acids. In comparison to alkanes, octadecene was found to be substantially more active as a reductant for elemental sulfur. To the best of our knowledge, this is the first example of quantitative correlation between chemical reactions and formation of high-quality nanocrystals under synthetic conditions. To demonstrate the importance of such discovery, we designed two independent and simplified synthetic approaches for synthesis of CdS nanocrystals. One approach with its reaction temperature at the critical temperature of S activation (180 °C) used the same reactant composition as the classic approach but without any hot injection. The other approach performed at an ordinary laboratory temperature (≤100 °C) and in a common organic solvent (toluene) was achieved by addition of fatty amine as activation reagent of elemental sulfur." @default.
- W2316563566 created "2016-06-24" @default.
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- W2316563566 date "2011-10-11" @default.
- W2316563566 modified "2023-09-23" @default.
- W2316563566 title "Correlation of CdS Nanocrystal Formation with Elemental Sulfur Activation and Its Implication in Synthetic Development" @default.
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- W2316563566 doi "https://doi.org/10.1021/ja204538f" @default.
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