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Published on: February 6, 2016
Engineering Mn2+-Doped CdS/ZnS Quantum Dot Surfaces to Control Auger Upconversion Photocatalysis
Bereket L Zekarias1, Luis Pablo Arriaga Gonzalez1, Olivia A De Luca2
1Department of Chemistry, Columbia University, New York, New York 10027, United States.
None:
Mn2+-doped CdS/ZnS quantum dots, in which surface stearate ligands are replaced with ligands that form ion pairs, are stable photocatalysts capable of reducing a variety of aryl chloride substrates, defluorinating fluorinated aromatic compounds, and facilitating the formation of new C-C bonds. Enhanced activity of the electrostatically stabilized quantum dot dispersions in polar solutions is observed at very low catalyst loadings (0.0005 mol %). The full scope of the reactions studied points to the importance of engineering quantum dot surface chemistry to control the reactivity afforded by hot electrons generated by multiphoton absorption and Auger upconversion.
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