Alkoxy-Terminated Si Surfaces: A New Reactive Platform for the Functionalization and Derivatization of Silicon Quantum Dots

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• 作者：Tapas K. Purkait ; Muhammad Iqbal ; Muhammad Amirul Islam ; Md Hosnay Mobarok ; Christina M. Gonzalez ; Lida Hadidi ; Jonathan G. C. Veinot
• 刊名：Journal of the American Chemical Society
• 出版年：2016
• 出版时间：June 8, 2016
• 年：2016
• 卷：138
• 期：22
• 页码：7114-7120
• 全文大小：472K
• 年卷期：0
• ISSN：1520-5126

文摘

Alkoxy-terminated silicon quantum dots (SiQDs) were synthesized via hydrosilylation of aliphatic ketones on hydride-terminated SiQD (H-SiQD) surfaces under microwave-irradiation. Aromatic ketones undergo hydrosilylation on H-SiQD surfaces at room temperature without requiring any catalyst. The alkoxy-terminated SiQDs are soluble in organic solvents, colloidally stable, and show bright and size dependent photoluminescence (PL). The alkoxy-functionalized silicon surfaces were used as reactive platform for further functionalization via unprecedented ligand exchange of the alkoxy-surface groups with alkyl or alkenyl-surface groups in the presence of BH₃·THF. Proton nuclear magnetic resonance (¹H NMR), Fourier transform infrared (FTIR), and X-ray photoelectron spectroscopy (XPS) spectroscopy confirmed alkoxy-terminated surfaces and their ligand exchange reactions in the presence of various alkenes and alkynes.