Journal of Physical Chemistry C, volume 114, issue 2, pages 897-906

The Effect of a Common Purification Procedure on the Chemical Composition of the Surfaces of CdSe Quantum Dots Synthesized with Trioctylphosphine Oxide

Publication typeJournal Article
Publication date2009-12-28
Q1
Q3
SJR0.957
CiteScore6.5
Impact factor3.3
ISSN19327447, 19327455
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Physical and Theoretical Chemistry
General Energy
Abstract
This paper describes a quantitative analysis of the chemical composition of organic/inorganic interfaces of colloidal 3.1-nm CdSe quantum dots (QDs) synthesized with trioctylphosphine oxide (TOPO) as the coordinating solvent and purified by successive precipitations from a chloroform/methanol solvent/nonsolvent system. A combination of X-ray photoelectron spectroscopy, inductively coupled plasma-atomic emission spectroscopy, and NMR (both 1H and 31P) reveals that the only ligands that form a stable population on the surface of the QDs are X-type alkylphosphonate and carboxylate ligands. n-Octylphosphonate (OPA), a known impurity in technical-grade (90%) TOPO, and P′-P′-(di-n-octyl) pyrophosphonate (PPA), the self-condensation product of OPA, cover ∼84% of the atoms on the surface of the QDs, whereas few of the L-type (datively bound) ligands hexadecylamine (HDA), TOPO, and trioctylphosphine selenide (TOPSe) are present as bound ligands once the excess free surfactant is removed from the reaction mixture. ...

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GOST Copy
Morris Cohen A. J. et al. The Effect of a Common Purification Procedure on the Chemical Composition of the Surfaces of CdSe Quantum Dots Synthesized with Trioctylphosphine Oxide // Journal of Physical Chemistry C. 2009. Vol. 114. No. 2. pp. 897-906.
GOST all authors (up to 50) Copy
Morris Cohen A. J., Donakowski M. D., Knowles K. E., Weiss E. A. The Effect of a Common Purification Procedure on the Chemical Composition of the Surfaces of CdSe Quantum Dots Synthesized with Trioctylphosphine Oxide // Journal of Physical Chemistry C. 2009. Vol. 114. No. 2. pp. 897-906.
RIS |
Cite this
RIS Copy
TY - JOUR
DO - 10.1021/jp909492w
UR - https://doi.org/10.1021/jp909492w
TI - The Effect of a Common Purification Procedure on the Chemical Composition of the Surfaces of CdSe Quantum Dots Synthesized with Trioctylphosphine Oxide
T2 - Journal of Physical Chemistry C
AU - Morris Cohen, Adam J
AU - Donakowski, Martin D.
AU - Knowles, Kathryn E
AU - Weiss, Emily A.
PY - 2009
DA - 2009/12/28
PB - American Chemical Society (ACS)
SP - 897-906
IS - 2
VL - 114
SN - 1932-7447
SN - 1932-7455
ER -
BibTex |
Cite this
BibTex (up to 50 authors) Copy
@article{2009_Morris Cohen,
author = {Adam J Morris Cohen and Martin D. Donakowski and Kathryn E Knowles and Emily A. Weiss},
title = {The Effect of a Common Purification Procedure on the Chemical Composition of the Surfaces of CdSe Quantum Dots Synthesized with Trioctylphosphine Oxide},
journal = {Journal of Physical Chemistry C},
year = {2009},
volume = {114},
publisher = {American Chemical Society (ACS)},
month = {dec},
url = {https://doi.org/10.1021/jp909492w},
number = {2},
pages = {897--906},
doi = {10.1021/jp909492w}
}
MLA
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MLA Copy
Morris Cohen, Adam J., et al. “The Effect of a Common Purification Procedure on the Chemical Composition of the Surfaces of CdSe Quantum Dots Synthesized with Trioctylphosphine Oxide.” Journal of Physical Chemistry C, vol. 114, no. 2, Dec. 2009, pp. 897-906. https://doi.org/10.1021/jp909492w.
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