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Binding of phosphonic acids to CdSe quantum dots: a solution NMR study

Raquel Filipa Gomes Pinto Fernandes UGent, Antti Hassinen UGent, Agnieszka Szczygiel UGent, Qiang Zhao, André Vantomme, José Martins UGent and Zeger Hens UGent (2011) JOURNAL OF PHYSICAL CHEMISTRY LETTERS. 2(3). p.145-152
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/phosphonic acid exchange interaction and the ratio between the Cd surface excess and the ligand density indicate that phosphonic acids bind as hydrogen phosphonates to the CdSe surface.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
MAGNETIC-RESONANCE-SPECTROSCOPY, FIELD GRADIENT NMR, TRIOCTYLPHOSPHINE OXIDE, COLLOIDAL NANOCRYSTALS, LIGAND-EXCHANGE, NANOPARTICLES, GROWTH, SURFACE, DIFFUSION, NANORODS
journal title
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
J. Phys. Chem. Lett.
volume
2
issue
3
pages
145 - 152
Web of Science type
Article
Web of Science id
000287048800004
JCR category
PHYSICS, ATOMIC, MOLECULAR & CHEMICAL
JCR impact factor
6.213 (2011)
JCR rank
1/32 (2011)
JCR quartile
1 (2011)
ISSN
1948-7185
DOI
10.1021/jz1016729
project
Center for nano- and biophotonics (NB-Photonics)
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1973983
handle
http://hdl.handle.net/1854/LU-1973983
date created
2011-12-23 14:59:23
date last changed
2018-01-29 12:12:32
@article{1973983,
  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/phosphonic acid exchange interaction and the ratio between the Cd surface excess and the ligand density indicate that phosphonic acids bind as hydrogen phosphonates to the CdSe surface.},
  author       = {Gomes Pinto Fernandes, Raquel Filipa and Hassinen, Antti and Szczygiel, Agnieszka and Zhao, Qiang and Vantomme, Andr{\'e} and Martins, Jos{\'e} and Hens, Zeger},
  issn         = {1948-7185},
  journal      = {JOURNAL OF PHYSICAL CHEMISTRY LETTERS},
  keyword      = {MAGNETIC-RESONANCE-SPECTROSCOPY,FIELD GRADIENT NMR,TRIOCTYLPHOSPHINE OXIDE,COLLOIDAL NANOCRYSTALS,LIGAND-EXCHANGE,NANOPARTICLES,GROWTH,SURFACE,DIFFUSION,NANORODS},
  language     = {eng},
  number       = {3},
  pages        = {145--152},
  title        = {Binding of phosphonic acids to CdSe quantum dots: a solution NMR study},
  url          = {http://dx.doi.org/10.1021/jz1016729},
  volume       = {2},
  year         = {2011},
}

Chicago
Gomes Pinto Fernandes, Raquel Filipa, Antti Hassinen, Agnieszka Szczygiel, Qiang Zhao, André Vantomme, José Martins, and Zeger Hens. 2011. “Binding of Phosphonic Acids to CdSe Quantum Dots: a Solution NMR Study.” Journal of Physical Chemistry Letters 2 (3): 145–152.
APA
Gomes Pinto Fernandes, R. F., Hassinen, A., Szczygiel, A., Zhao, Q., Vantomme, A., Martins, J., & Hens, Z. (2011). Binding of phosphonic acids to CdSe quantum dots: a solution NMR study. JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2(3), 145–152.
Vancouver
1.
Gomes Pinto Fernandes RF, Hassinen A, Szczygiel A, Zhao Q, Vantomme A, Martins J, et al. Binding of phosphonic acids to CdSe quantum dots: a solution NMR study. JOURNAL OF PHYSICAL CHEMISTRY LETTERS. 2011;2(3):145–52.
MLA
Gomes Pinto Fernandes, Raquel Filipa, Antti Hassinen, Agnieszka Szczygiel, et al. “Binding of Phosphonic Acids to CdSe Quantum Dots: a Solution NMR Study.” JOURNAL OF PHYSICAL CHEMISTRY LETTERS 2.3 (2011): 145–152. Print.