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Visible-light photoexcitation of pyridine surface complex, leading to selective dehydrogenative cross-coupling with cyclohexane

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Abstract

Upon photoirradiation with visible light, a pyridine molecule adsorbed on a TiO2 surface can be photoexcited to give a pyridine radical cation via ligand-to-metal charge transfer (LMCT) between pyridine and titanium. This leads to dehydrogenative cross-coupling (DCC) between pyridine and cyclohexane with concomitant hydrogen evolution. Since the radical cation can selectively oxidize cyclohexane to a cyclohexyl radical, the cross-coupling between pyridine and cyclohexane proceeds with higher selectivity compared with that in photocatalysis by TiO2 under UV irradiation.

Graphical abstract: Visible-light photoexcitation of pyridine surface complex, leading to selective dehydrogenative cross-coupling with cyclohexane

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Publication details

The article was received on 08 Jul 2018, accepted on 17 Aug 2018 and first published on 18 Aug 2018


Article type: Paper
DOI: 10.1039/C8CP04292F
Citation: Phys. Chem. Chem. Phys., 2018, Advance Article
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    Visible-light photoexcitation of pyridine surface complex, leading to selective dehydrogenative cross-coupling with cyclohexane

    S. Naniwa, A. Tyagi, A. Yamamoto and H. Yoshida, Phys. Chem. Chem. Phys., 2018, Advance Article , DOI: 10.1039/C8CP04292F

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