In situ spectroscopic characterization of a solution-phase X-type ligand exchange at colloidal lead sulphide quantum dot surfaces
- National Renewable Energy Lab. (NREL), Golden, CO (United States); Univ. of Colorado, Boulder, CO (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
Here, we employed quantitative NMR spectroscopy and spectrophotometric absorbance titration to study a quantum dot X-type ligand exchange reaction. We find that the exchange is highly cooperative, where at low extents of exchange the change in free energy of the reaction, ΔGXC, is ~11 kJ mol–1 while at higher extents of exchange ΔGXC saturates to ~–4 kJ mol–1. A modified Fowler binding isotherm is developed to describe the reaction.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1334589
- Report Number(s):
- NREL/JA-5900-67253; CHCOFS
- Journal Information:
- ChemComm, Vol. 52, Issue 96; ISSN 1359-7345
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 29 works
Citation information provided by
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Web of Science
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