Journal of the American Chemical Society, volume 130, issue 17, pages 5689-5698
Identification of Acidic Phosphorus-Containing Ligands Involved in the Surface Chemistry of CdSe Nanoparticles Prepared in Tri-N-octylphosphine Oxide Solvents
Publication type: Journal Article
Publication date: 2008-04-01
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 15
ISSN: 00027863, 15205126
General Chemistry
Catalysis
Biochemistry
Colloid and Surface Chemistry
Abstract
The surface ligand composition of CdSe nanoparticles prepared using technical grade tri-n-octylphosphine oxide (TOPO) was investigated using a nucleophilic ligand displacement methodology and (31)P {(1)H} NMR spectroscopy. 4-(N,N-Dimethylamino)pyridine (DMAP) and benzyltrimethylammonium propionate were added to tetrahydrofuran solutions of CdSe nanoparticles prepared in technical grade TOPO. DMAP was shown to be a sufficiently strong nucleophile to displace the more weakly coordinating ligands, TOPO, TOPSe, di-n-octylphosphinate, and n-octylphosphonate (OPA). Benzyltrimethylammonium propionate was shown to be a stronger nucleophile than DMAP in that it could displace all the aforementioned surface-bound ligands as well as a previously unidentified surface-bound phosphorus species. Independent synthesis and (31)P {(1)H} NMR spectral matching confirmed that the new species was P,P'-(di-n-octyl) dihydrogen pyrophosphonic acid (PPA). The PPA was shown to form during the nanoparticle synthesis via the dehydrative condensation of OPA. CdSe nanoparticle syntheses were performed using pure TOPO and added OPA, and subsequent displacement experiments showed that OPA and PPA were the predominant surface-bound ligands. CdSe nanoparticle syntheses were performed using pure TOPO and added PPA, and subsequent displacement experiments showed that PPA was the predominant surface-bound ligand. PPA was also shown to have the greatest affinity for the nanoparticle surface of all the ligands investigated. Thus, a model for the surface ligand composition could be developed for nanoparticles prepared using technical grade TOPO or other high-boiling solvents with added acidic phosphorus compounds.
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- We do not take into account publications without a DOI.
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Kopping J. T., Patten T. E. Identification of Acidic Phosphorus-Containing Ligands Involved in the Surface Chemistry of CdSe Nanoparticles Prepared in Tri-N-octylphosphine Oxide Solvents // Journal of the American Chemical Society. 2008. Vol. 130. No. 17. pp. 5689-5698.
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Kopping J. T., Patten T. E. Identification of Acidic Phosphorus-Containing Ligands Involved in the Surface Chemistry of CdSe Nanoparticles Prepared in Tri-N-octylphosphine Oxide Solvents // Journal of the American Chemical Society. 2008. Vol. 130. No. 17. pp. 5689-5698.
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TY - JOUR
DO - 10.1021/ja077414d
UR - https://doi.org/10.1021/ja077414d
TI - Identification of Acidic Phosphorus-Containing Ligands Involved in the Surface Chemistry of CdSe Nanoparticles Prepared in Tri-N-octylphosphine Oxide Solvents
T2 - Journal of the American Chemical Society
AU - Kopping, Jordan T
AU - Patten, Timothy E.
PY - 2008
DA - 2008/04/01 00:00:00
PB - American Chemical Society (ACS)
SP - 5689-5698
IS - 17
VL - 130
SN - 0002-7863
SN - 1520-5126
ER -
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@article{2008_Kopping,
author = {Jordan T Kopping and Timothy E. Patten},
title = {Identification of Acidic Phosphorus-Containing Ligands Involved in the Surface Chemistry of CdSe Nanoparticles Prepared in Tri-N-octylphosphine Oxide Solvents},
journal = {Journal of the American Chemical Society},
year = {2008},
volume = {130},
publisher = {American Chemical Society (ACS)},
month = {apr},
url = {https://doi.org/10.1021/ja077414d},
number = {17},
pages = {5689--5698},
doi = {10.1021/ja077414d}
}
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Kopping, Jordan T., and Timothy E. Patten. “Identification of Acidic Phosphorus-Containing Ligands Involved in the Surface Chemistry of CdSe Nanoparticles Prepared in Tri-N-octylphosphine Oxide Solvents.” Journal of the American Chemical Society, vol. 130, no. 17, Apr. 2008, pp. 5689-5698. https://doi.org/10.1021/ja077414d.