Metal-free g-C3N4 nanosheets as a highly visible-light-active photocatalyst for thiol-ene reactions
Publication in refereed journal

香港中文大學研究人員
替代計量分析
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其它資訊
摘要Thiol-ene click reactions are important for the construction of carbon-sulfur bonds. The use of visible-light photoredox catalysis for the formation of C-S bonds has attracted much attention. In this work, two-dimensional metal-free graphitic carbon nitride (g-C3N4) nanosheets are prepared through a simple thermal polymerization method and used to catalyze the thiol-ene click reaction under visible light-illumination. This green, atom-economic, and inexpensive approach for the hydrothiolation of alkenes is applicable for structurally different substrates and exhibits superior yields. In air or nitrogen atmosphere, the reaction yield decreases when a hole scavenging agent, CH3OH, is introduced, which indicates that photogenerated holes in the g-C3N4 nanosheets play an important role in the formation of thiyl radicals. The g-C3N4 nanosheets still show a good stability and favorable photocatalytic activity after five cycles of the reaction. Moreover, this approach can be scaled up to the gram-scale synthesis of benzyl(phenethyl)sulfane with a yield up to 93%. Our study suggests a good potential of semiconducting g-C3N4 nanosheets as a metal-free, efficient photocatalyst for various thiol-ene click reactions and even for other organic reactions.
著者Zhang SR, Yi WJ, Guo YZ, Ai RQ, Yuan ZC, Yang BC, Wang JF
期刊名稱Nanoscale
出版年份2021
月份2
日期14
卷號13
期次6
出版社ROYAL SOC CHEMISTRY
頁次3493 - 3499
國際標準期刊號2040-3364
電子國際標準期刊號2040-3372
語言英式英語
Web of Science 學科類別Chemistry, Multidisciplinary;Nanoscience & Nanotechnology;Materials Science, Multidisciplinary;Physics, Applied;Chemistry;Science & Technology - Other Topics;Materials Science;Physics

上次更新時間 2022-14-01 於 00:21