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Ligand interaction and dynamics in CdSe Quantum dot dispersions: a solution NMR investigation

Bernd Fritzinger UGent, Richard Capek UGent, Karel Lambert UGent, Zeger Hens UGent and José Martins UGent (2009) Abstracts 31st Discussion Meeting - Magnetic Resonance in Chemistry and Materials Research.
abstract
Quantum dots are inorganic nanocrystals of great interest in today’s research due to their optical properties. Their tunable bandgap opens a wide range of possible applications in areas such as light emitting diodes, fluorescent markers, lasers, solar cells and NIR communication devices. Most of their handling, synthesis and modification is done in colloidal dispersion using organic capping ligands. To stabilize the nanocrystal dispersion, an understanding of the ligand-nanocrystal interactions is essential. Nevertheless most characterization techniques applied to nanocrystal dispersions are focused only on the nanocrystal core. Previously, we have demonstrated the potential of solution NMR to characterize nanocrystal dispersions thereby focusing on the ligands on a number of different systems. Methods of choice were 1D 1H NMR, DOSY and NOESY NMR. With this set of techniques we were able to characterize systems with very tightly bound capping ligands as well as systems where the ligands are in fast exchange between nanocrystal surface and free solution. Here we want to show the results of an in depth NMR analysis of CdSe with Oleic Acid ligands focusing on the following goals: What is the exchange regime and how can it be proven? What can we say about the nanocrystal surface? Is Oleic Acid as ligand protonated? Can we find correlations between dynamic processes found by NMR and found by other methods?
Please use this url to cite or link to this publication:
author
organization
year
type
conference
publication status
published
subject
keyword
NMR, CdSe, Nanocrystal, Ligand
in
Abstracts 31st Discussion Meeting - Magnetic Resonance in Chemistry and Materials Research
editor
Ulrich Scheler
pages
1 pages
publisher
GDCh
conference name
31st Discussion Meeting - Magnetic Resonance in Chemistry and Materials Research
conference location
Dresden, Germany
conference start
2009-09-21
conference end
2009-09-24
language
English
UGent publication?
yes
classification
C3
id
785863
handle
http://hdl.handle.net/1854/LU-785863
date created
2009-11-20 11:45:12
date last changed
2009-11-24 13:40:57
@inproceedings{785863,
  abstract     = {Quantum dots are inorganic nanocrystals of great interest in today{\textquoteright}s research due to their optical properties. Their tunable bandgap opens a wide range of possible applications in areas such as light emitting diodes, fluorescent markers, lasers, solar cells and NIR communication devices. Most of their handling, synthesis and modification is done in colloidal dispersion using organic capping ligands. To stabilize the nanocrystal dispersion, an understanding of the ligand-nanocrystal interactions is essential. Nevertheless most characterization techniques applied to nanocrystal dispersions are focused only on the nanocrystal core. Previously, we have demonstrated the potential of solution NMR to characterize nanocrystal dispersions thereby focusing on the ligands on a number of different systems. Methods of choice were 1D 1H NMR, DOSY and NOESY NMR. With this set of techniques we were able to characterize systems with very tightly bound capping ligands as well as systems where the ligands are in fast exchange between nanocrystal surface and free solution.

Here we want to show the results of an in depth NMR analysis of CdSe with Oleic Acid ligands focusing on the following goals: What is the exchange regime and how can it be proven? What can we say about the nanocrystal surface? Is Oleic Acid as ligand protonated? Can we find correlations between dynamic processes found by NMR and found by other methods?},
  author       = {Fritzinger, Bernd and Capek, Richard and Lambert, Karel and Hens, Zeger and Martins, Jos{\'e}},
  booktitle    = {Abstracts 31st Discussion Meeting - Magnetic Resonance in Chemistry and Materials Research},
  editor       = {Scheler, Ulrich},
  keyword      = {NMR,CdSe,Nanocrystal,Ligand},
  language     = {eng},
  location     = {Dresden, Germany},
  pages        = {1},
  publisher    = {GDCh},
  title        = {Ligand interaction and dynamics in CdSe Quantum dot dispersions: a solution NMR investigation},
  year         = {2009},
}

Chicago
Fritzinger, Bernd, Richard Capek, Karel Lambert, Zeger Hens, and José Martins. 2009. “Ligand Interaction and Dynamics in CdSe Quantum Dot Dispersions: a Solution NMR Investigation.” In Abstracts 31st Discussion Meeting - Magnetic Resonance in Chemistry and Materials Research, ed. Ulrich Scheler, L24. GDCh.
APA
Fritzinger, B., Capek, R., Lambert, K., Hens, Z., & Martins, J. (2009). Ligand interaction and dynamics in CdSe Quantum dot dispersions: a solution NMR investigation. In U. Scheler (Ed.), Abstracts 31st Discussion Meeting - Magnetic Resonance in Chemistry and Materials Research (p. L24). Presented at the 31st Discussion Meeting - Magnetic Resonance in Chemistry and Materials Research, GDCh.
Vancouver
1.
Fritzinger B, Capek R, Lambert K, Hens Z, Martins J. Ligand interaction and dynamics in CdSe Quantum dot dispersions: a solution NMR investigation. In: Scheler U, editor. Abstracts 31st Discussion Meeting - Magnetic Resonance in Chemistry and Materials Research. GDCh; 2009. p. L24.
MLA
Fritzinger, Bernd, Richard Capek, Karel Lambert, et al. “Ligand Interaction and Dynamics in CdSe Quantum Dot Dispersions: a Solution NMR Investigation.” Abstracts 31st Discussion Meeting - Magnetic Resonance in Chemistry and Materials Research. Ed. Ulrich Scheler. GDCh, 2009. L24. Print.