Thermally Induced Silane Dehydrocoupling on Silicon Nanostructures
| Autor: | Youlin Pan, Barry C. Arkles, Dokyoung Kim, Alice Boarino, Kyo Han Ahn, Michael J. Sailor, Jinmyoung Joo, Yong Woong Jun |
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| Rok vydání: | 2016 |
| Předmět: |
quantum dots
surface chemistry 02 engineering and technology mesoporous materials 010402 general chemistry Porous silicon 01 natural sciences Catalysis Contact angle chemistry.chemical_compound Organic chemistry Aqueous solution Silanes 010405 organic chemistry Communication Organic Chemistry General Chemistry General Medicine 021001 nanoscience & nanotechnology Silane Communications Surface Modification 0104 chemical sciences porous silicon chemistry Chemical engineering Reagent Chemical Sciences photoluminescence Azide Mesoporous material 0210 nano-technology |
| Zdroj: | Angewandte Chemie (International ed. in English), vol 55, iss 22 Angewandte Chemie (International Ed. in English) |
| ISSN: | 1521-3757 0044-8249 |
| DOI: | 10.1002/ange.201601010 |
| Popis: | Organic trihydridosilanes can be grafted to hydrogen-terminated porous Si nanostructures with no catalyst. The reaction proceeds efficiently at 80 °C, and it shows little sensitivity to air or water impurities. The modified surfaces are stable to corrosive aqueous solutions and common organic solvents. Octadecylsilane H3 Si(CH2 )17 CH3 , and functional silanes H3 Si(CH2 )11 Br, H3 Si(CH2 )9 CH=CH2 , and H3 Si(CH2 )2 (CF2 )5 CF3 are readily grafted. When performed on a mesoporous Si wafer, the perfluoro reagent yields a superhydrophobic surface (contact angle 151°). The bromo-derivative is converted to azide, amine, or alkyne functional surfaces via standard transformations, and the utility of the method is demonstrated by loading of the antibiotic ciprofloxaxin (35 % by mass). When intrinsically photoluminescent porous Si films or nanoparticles are used, photoluminescence is retained in the grafted products, indicating that the chemistry does not introduce substantial nonradiative surface traps. |
| Databáze: | OpenAIRE |
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