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The formation mechanism of CdSe QDs through the thermolysis of Cd(oleate)2 and TOPSe in the presence of alkylamine
- Source :
- J. Mater. Chem. C. 2:5593-5600
- Publication Year :
- 2014
- Publisher :
- Royal Society of Chemistry (RSC), 2014.
-
Abstract
- The thermal decomposition of Cd(oleate)2, a metal organocarboxylate complex, in the presence of alkylamine was studied in order to understand the formation mechanism of CdSe nanocrystals (quantum dots, QDs) in the hot-injection method. The major intermediates and side products were characterized by nuclear magnetic resonance (NMR) spectroscopy, X-ray diffraction (XRD), and transmission electron microscopy (TEM). The results showed that the nucleophilic attack of the metal-coordinated amine toward the most electron-deficient carbonyl carbon of the oleate ligands initiated decomposition to generate a CdO cluster (or oligomer). Based on our experimental results, we proposed a two-step formation mechanism of CdSe QDs involving the formation of CdO intermediates with alkylamines playing a critical role as nucleophiles in the thermolysis process, followed by a metathesis reaction with trioctylphosphine selenide (TOPSe) as a chalcogenide source.
Details
- ISSN :
- 20507534 and 20507526
- Volume :
- 2
- Database :
- OpenAIRE
- Journal :
- J. Mater. Chem. C
- Accession number :
- edsair.doi...........12e4c5adf4bf77cd50024d813fc6592b