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Binding of Phosphonic Acids to CdSe Quantum Dots: A Solution NMR Study
Abstract
We use 1 H and 31 P solution nuclear magnetic resonance spectroscopy to analyze the binding of phosphonic acid ligands to wurtzite CdSe quantum dots (CdSe QDs). CdSe QDs synthesized with phosphonic acids as a surfactant have a ligand shell composed of phosphonic acid and phosphonic acid anhydride moieties. Titrations of as-synthesized QDs with excess oleic acid do not induce desorption of phosphonic species, whereas titration of oleic-acid-exchanged QDs with excess phosphonic acid shows that the latter quantitatively replaces the oleic acid with a 1:1 stoichiometry. Both the stoichiometry of the oleic acid/phosponic acid exchange interaction and the ratio between the Cd surface excess and the ligand density indicate that phosponic acids bind as hydrogen phosphonates to the CdSe surface.
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Shape control of CdSe nanocrystals
Peng, X., Manna, L., Yang, W., Wickham, J., Scher, E., Kadavanich, A., & Alivisatos, A. P. (2000) · Nature · doi:10.1038/35003535 · Cited by 4,487
Colloidal nanocrystal synthesis and the organic–inorganic interface
Yin, Y., & Alivisatos, A. P. (2005) · Nature · doi:10.1038/nature04165 · Cited by 3,273
Cited by
Anderson, N. C., Hendricks, M. P., Choi, J. J., & Owen, J. S. (2013) · Journal of the American Chemical Society · doi:10.1021/ja4086758 · Cited by 874
Metadata
- Authors
- Gomes, R., Hassinen, A., Szczygiel, A., Zhao, Q., Vantomme, A., Martins, J. C., & Hens, Z.
- Venue
- The Journal of Physical Chemistry Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2011-01-07
- Volume
- 2
- Issue
- 3
- Pages
- 145-152
- ISSN
- 1948-7185 (ISSN-L)
- OpenAlex
- W2007577577
- Cited by
- 306
- References
- 2
- FWCI
- 9.91
- Type
- journal article
- Language
- en
- Open access
- closed
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- Gomes, R., Hassinen, A., Szczygiel, A., Zhao, Q., Vantomme, A., Martins, J. C., & Hens, Z. (2011). Binding of Phosphonic Acids to CdSe Quantum Dots: A Solution NMR Study. The Journal of Physical Chemistry Letters. https://doi.org/10.1021/jz1016729
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