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Diazonium Salts as Grafting Agents and Efficient Radical Hydrosilylation Initiators for Freestanding Photoluminescent Silicon Nanocrystals

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Hydrosilylation, Silicon Nanocrystal, Surface Grafting, Diazo Compounds

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      The reactivity of diazonium salts towards freestanding, photoluminescent silicon nanocrystals (SiNCs) is reported. It was found that SiNCs can be functionalized with aryl groups via direct reductive grafting of the diazonium salts. Furthermore diazonium salts proved to act as efficient radical initiators for SiNC hydrosilylation. For this purpose, novel electron deficient diazonium salts, highly soluble in nonpolar solvents, were synthesized. Thus the SiNCs were functionalized with a variety of alkenes and alkynes at room temperature with short reaction times.

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      Hydrosilylation, Silicon Nanocrystal, Surface Grafting, Diazo Compounds


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