Water-soluble CdSe Quantum Dots
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Product Description
Alfa Chemistry offers unique advantages such as high fluorescence quantum yields, tunable fluorescence emission spectra, good biocompatibility, stable optical properties, and narrow and symmetrical emission bands. Alfa Chemistry offers high-quality water-soluble CdSe quantum dots, a fluorescent nanomaterial with a CdSe core and a surface covered with hydrophilic ligands. Water-soluble CdSe quantum dot products can be used as biological and chemical probes for basic research, such as cellular localization and imaging, chemical detection and clinical diagnostics.
Water-soluble CdSe Quantum Dots (hydroxyl) are CdSe quantum dots coated with hydroxy, with the emission peaks of 630 nm.
Water-soluble CdSe-like Quantum Dots (positive charge) are CdSe quantum dots coated with positive charge, with the emission peaks of 550 nm.
Water-soluble CdSe Quantum Dots (amino group) are CdSe quantum dots coated with amino group, with the emission peaks ranging from 520 nm to 630 nm.
Water-soluble CdSe Quantum Dots (carboxyl group) are CdSe quantum dots coated with carboxyl group, with the emission peaks ranging from 520 nm to 630 nm.
Applications
Photocatalysis
The oxidative cleavage of C=C bonds is an important chemical reaction and a popular reaction in the field of photocatalysis. However, high catalyst loading and low turnover number (TON) are common drawbacks in the reported visible light-driven reactions. Thus, Li et al. illustrated that high turnover number can be achieved by direct oxidative cleavage of C=C bonds by water-soluble CdSe quantum dots (QDs) under visible light irradiation at room temperature. Under the same conditions, water-soluble CdSe QDs can also oxidize sulfides to sulfides with yields of 51-84%.
Fig.1 Schematic diagram of CdSe quantum dots used in photocatalysis. (Li, 2021)
In Vitro Antimicrobial Properties
Water-soluble quantum dots are usually prepared by surface modification of hydrophobic quantum dots synthesized in organic solutions or directly in aqueous solutions. a novel biopolymer based on poly((2-dimethylaminoethyl) methacrylate) grafted onto salep (salep-g-PDMA) for passivation of CdSe quantum dots was introduced by Bardajee et al. This water-soluble biopolymer-coated CdSe quantum dots obtained reasonable optical properties and high stability without the use of expensive materials and complex surface modification procedures, with the advantages of simplicity, low cost and green precursors. The in vitro antimicrobial performance of the best samples obtained against Gram-negative and Gram-positive bacteria was studied with such quantum dots.
Fig. 2 Schematic illustration of the water-soluble CdSe QDs coated by salep-g-PDMA. (Bardajee, 2013)
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References
- Li J., et al. Visible-Light-Driven Oxidative Cleavage of Alkenes Using Water-Soluble CdSe Quantum Dots[J]. ChemSusChem, 2021, 14(22): 4985-4992.
- Bardajee, G. R., et al. Antibacterial and optical properties of a new water soluble CdSe quantum dots coated by multidentate biopolymer[J]. Journal of Photochemistry & Photobiology A Chemistry, 2013, 252:46-52.
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