ArticleChemistry of materials : a publication of the American Chemical Society2016
Organic-to-Aqueous Phase Transfer of Cadmium Chalcogenide Quantum Dots using a Sulfur-Free Ligand for Enhanced Photoluminescence and Oxidative Stability.
Article in Chemistry of materials : a publication of the American Chemical Society, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Design of an activatable NIR-II nanoprobe for theChemical science · 2022Article
- Designing the Surface Chemistry of Inorganic Nanocrystals for Cancer Imaging and Therapy.Cancers · 2022Review
- Entropy of Branching Out: Linear versus Branched Alkylthiols Ligands on CdSe Nanocrystals.ACS nano · 2022Article
- Turning over on sticky balls: preparation and catalytic studies of surface-functionalized TiORSC advances · 2021Article
- From Red to Green Luminescence via Surface Functionalization. Effect of 2-(5-Mercaptothien-2-yl)-8-(thien-2-yl)-5-hexylthieno[3,4-Inorganic chemistry · 2020Article
- The SALSAC approach: comparing the reactivity of solvent-dispersed nanoparticles with nanoparticulate surfaces.Nanoscale advances · 2020Article
- Colloidally Stable CdS Quantum Dots in Water with Electrostatically Stabilized Weak-Binding, Sulfur-Free Ligands.Chemistry (Weinheim an der Bergstrasse, Germany) · 2019Article
- pH-Dependent structure of water-exposed surfaces of CdSe quantum dots.Chemical communications (Cambridge, England) · 2019Article
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Authors and funding
5 authors.
Funding
Abstract
This paper describes a procedure for transferring colloidal CdS and CdSe quantum dots (QDs) from organic solvents to water by exchanging their native hydrophobic ligands for phosphonopropionic acid (PPA) ligands, which bind to the QD surface through the phosphonate group. This method, which uses dimethylformamide as an intermediate transfer solvent, was developed in order to produce high-quality water soluble QDs with neither a sulfur-containing ligand nor a polymer encapsulation layer, both of which have disadvantages in applications of QDs to photocatalysis and biological imaging. CdS (CdSe) QDs were transferred to water with a 43% (48%) yield using PPA. The photoluminescence (PL) quantum yield for PPA-capped CdSe QDs is larger than that for QDs capped with the analogous sulfur-containing ligand, mercaptopropionic acid (MPA), by a factor of four at pH 7, and by up to a factor of 100 under basic conditions. The MPA ligands within MPA-capped QDs oxidize at E
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Registered trials
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