Al2O3 Surface Complexation for Photocatalytic Organic Transformations
The use of sunlight to drive organic reactions constitutes a green and sustainable strategy for organic synthesis. Herein, we discovered that the earth-abundant aluminum oxide (Al2O3) though paradigmatically known to be an insulator could induce an immense increase in the selective photo-oxidation o...
| Main Authors: | , , , , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2017
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| Online Access: | https://hdl.handle.net/10356/83308 http://hdl.handle.net/10220/42517 |
| _version_ | 1826122364689055744 |
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| author | Leow, Wan Ru Ng, Wilson Kwok Hung Peng, Tai Liu, Xinfeng Li, Bin Shi, Wenxiong Lum, Yanwei Wang, Xiaotian Sum, Tze Chien Hirao, Hajime Chen, Xiaodong Lang, Xianjun Li, Shuzhou Mathews, Nripan Ager, Joel W. |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Leow, Wan Ru Ng, Wilson Kwok Hung Peng, Tai Liu, Xinfeng Li, Bin Shi, Wenxiong Lum, Yanwei Wang, Xiaotian Sum, Tze Chien Hirao, Hajime Chen, Xiaodong Lang, Xianjun Li, Shuzhou Mathews, Nripan Ager, Joel W. |
| author_sort | Leow, Wan Ru |
| collection | NTU |
| description | The use of sunlight to drive organic reactions constitutes a green and sustainable strategy for organic synthesis. Herein, we discovered that the earth-abundant aluminum oxide (Al2O3) though paradigmatically known to be an insulator could induce an immense increase in the selective photo-oxidation of different benzyl alcohols in the presence of a large variety of dyes and O2. This unique phenomenon is based on the surface complexation of benzyl alcohol (BnOH) with the Brønsted base sites on Al2O3, which reduces its oxidation potential and causes an upshift in its HOMO for electron abstraction by the dye. The surface complexation of O2 with Al2O3 also activates the adsorbed O2 for receiving electrons from the photoexcited dyes. This discovery brings forth a new understanding on utilizing surface complexation mechanisms between the reactants and earth abundant materials to effectively achieve a wider range of photoredox reactions. |
| first_indexed | 2024-10-01T05:47:18Z |
| format | Journal Article |
| id | ntu-10356/83308 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:47:18Z |
| publishDate | 2017 |
| record_format | dspace |
| spelling | ntu-10356/833082020-06-01T10:01:32Z Al2O3 Surface Complexation for Photocatalytic Organic Transformations Leow, Wan Ru Ng, Wilson Kwok Hung Peng, Tai Liu, Xinfeng Li, Bin Shi, Wenxiong Lum, Yanwei Wang, Xiaotian Sum, Tze Chien Hirao, Hajime Chen, Xiaodong Lang, Xianjun Li, Shuzhou Mathews, Nripan Ager, Joel W. School of Materials Science & Engineering School of Physical and Mathematical Sciences The use of sunlight to drive organic reactions constitutes a green and sustainable strategy for organic synthesis. Herein, we discovered that the earth-abundant aluminum oxide (Al2O3) though paradigmatically known to be an insulator could induce an immense increase in the selective photo-oxidation of different benzyl alcohols in the presence of a large variety of dyes and O2. This unique phenomenon is based on the surface complexation of benzyl alcohol (BnOH) with the Brønsted base sites on Al2O3, which reduces its oxidation potential and causes an upshift in its HOMO for electron abstraction by the dye. The surface complexation of O2 with Al2O3 also activates the adsorbed O2 for receiving electrons from the photoexcited dyes. This discovery brings forth a new understanding on utilizing surface complexation mechanisms between the reactants and earth abundant materials to effectively achieve a wider range of photoredox reactions. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) 2017-05-30T02:04:32Z 2019-12-06T15:19:41Z 2017-05-30T02:04:32Z 2019-12-06T15:19:41Z 2016 2016 Journal Article Leow, W. R., Ng, W. K. H., Peng, T., Liu, X., Li, B., Shi, W., et al. (2017). Al2O3 Surface Complexation for Photocatalytic Organic Transformations. Journal of the American Chemical Society, 139(1), 269-276. 0002-7863 https://hdl.handle.net/10356/83308 http://hdl.handle.net/10220/42517 10.1021/jacs.6b09934 201160 en Journal of the American Chemical Society © 2016 American Chemical Society |
| spellingShingle | Leow, Wan Ru Ng, Wilson Kwok Hung Peng, Tai Liu, Xinfeng Li, Bin Shi, Wenxiong Lum, Yanwei Wang, Xiaotian Sum, Tze Chien Hirao, Hajime Chen, Xiaodong Lang, Xianjun Li, Shuzhou Mathews, Nripan Ager, Joel W. Al2O3 Surface Complexation for Photocatalytic Organic Transformations |
| title | Al2O3 Surface Complexation for Photocatalytic Organic Transformations |
| title_full | Al2O3 Surface Complexation for Photocatalytic Organic Transformations |
| title_fullStr | Al2O3 Surface Complexation for Photocatalytic Organic Transformations |
| title_full_unstemmed | Al2O3 Surface Complexation for Photocatalytic Organic Transformations |
| title_short | Al2O3 Surface Complexation for Photocatalytic Organic Transformations |
| title_sort | al2o3 surface complexation for photocatalytic organic transformations |
| url | https://hdl.handle.net/10356/83308 http://hdl.handle.net/10220/42517 |
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