The Journal of Physical Chemistry Letters· 2026Q1
Oleic Acid Binding and Exchange Dynamics on NaYF4 Nanocrystals
- 1citations
- Q1SCImago
- 2026year
Short summary
Oleic acid ligands on NaYF4 nanocrystals can be quantified and their exchange dynamics characterized, revealing how purification steps alter ligand density and impacting colloidal stability and functionalization.
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Key points
- Quantified oleic acid binding and exchange dynamics on NaYF4 nanocrystals.
- Distinguished between bound and free oleic acid populations using IR, NMR, and TGA.
- Detailed how common purification steps alter ligand density on the nanocrystal surface.
- Provided a foundation for rational nanocrystal purification and ligand-exchange strategies.
AI-generated from the title and abstract; the full text is not read.
Abstract
Abstract Lanthanide-doped NaYF4 nanocrystals (NCs) are widely used for their exceptional photoluminescence properties. Their performance and processability are critically dependent on surface-bound ligands such as oleic acid. While these ligands stabilize NCs during synthesis and in nonpolar solvents, applications often require post-synthetic ligand exchange. Here, we investigate the protonation state, surface ion binding, and exchange dynamics of oleic acid on NaYF4 NCs using a variety of analysis techniques, including infrared spectroscopy (IR), nuclear magnetic resonance spectroscopy (NMR), and thermogravimetric analysis (TGA). Our methods distinguish bound and free ligand populations, quantify surface coverage, and detail how common purification steps alter ligand density. These findings offer key insights into NC surface chemistry and provide a foundation for rational NC purification and ligand-exchange strategies, with implications for optimization of colloidal stability and functionalization.
The authors' abstract, as published at the source. The Journal of Physical Chemistry Letters, 2026 · DOI ↗
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Field: Materials Chemistry
Materials ChemistryMaterials Science