Photocatalyzed Sulfide Oxygenation with Water as the Unique Oxygen Atom Source
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- 作者：Pascal Guillo ; Olivier Hamelin ; Pinar Batat ; Gediminas Jonusauskas ; Nathan D. McClenaghan ; St茅phane M茅nage
- 刊名：Inorganic Chemistry
- 出版年：2012
- 出版时间：February 20, 2012
- 年：2012
- 卷：51
- 期：4
- 页码：2222-2230
- 全文大小：468K
- 年卷期：v.51,no.4(February 20, 2012)
- ISSN：1520-510X
文摘
In our research program aiming to develop new ruthenium-based polypyridine catalysts for oxidation we were interested in combining a photosensitizer and a catalytic fragment within the same complex to achieve catalytic light-driven oxidation. To respond to the lack of such conjugates, we report here a new catalytic system capable of using light to activate water molecules in order to perform selective sulfide oxygenation into sulfoxide via an oxygen atom transfer from H2O to the substrate with a TON of up to 197 卤 6. On the basis of electrochemical and photophysical studies, a proton-coupled electron-transfer process yielding to an oxidant Ru(IV)鈥搊xo species was proposed. In particular, the synergistic effect between both partners in the dyad yielding a more efficient catalyst compared to the bimolecular system is highlighted.