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  A "waiting" carbon nitride radical anion : a charge storage material and key intermediate in direct C-H thiolation of methylarenes using elemental sulfur as the "S"-source

Savateev, A., Kurpil, B., Mishchenko, A., Zhang, G., & Antonietti, M. (2018). A "waiting" carbon nitride radical anion: a charge storage material and key intermediate in direct C-H thiolation of methylarenes using elemental sulfur as the "S"-source. Chemical Science, 9(14), 3584-3591. doi:10.1039/C8SC00745D.

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 Creators:
Savateev, Aleksandr1, Author              
Kurpil, Bogdan1, Author              
Mishchenko, Artem, Author
Zhang, Guigang1, Author              
Antonietti, Markus2, Author              
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1Aleksandr Savateev, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2421702              
2Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863321              

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 Abstract: Potassium poly(heptazine imide), a carbon nitride based semiconductor with high structural order and a valence band potential of +2.2 V vs. NHE, in the presence of hole scavengers and under visible light irradiation gives the corresponding polymeric radical anion, in which the specific density of unpaired electrons reaches 112 µmol g-1. The obtained polymeric radical anion is stable under anaerobic conditions for several hours. It was characterized using UV-vis absorption, time resolved and steady state photoluminescence spectra. The electronic structure of the polymeric radical anion was confirmed by DFT cluster modelling. The unique properties of potassium poly(heptazine imide) for storing charges were employed in visible light photocatalysis. A series of substituted dibenzyldisulfanes was synthesized in 41-67% yield from the corresponding methylarenes via cleavage of the methyl C-H bond under visible light irradiation and metal-free conditions.

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 Dates: 2018-03-142018
 Publication Status: Published in print
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 Identifiers: DOI: 10.1039/C8SC00745D
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Title: Chemical Science
  Other : Chem. Sci.
Source Genre: Journal
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Publ. Info: Cambridge, UK : Royal Society of Chemistry
Pages: - Volume / Issue: 9 (14) Sequence Number: - Start / End Page: 3584 - 3591 Identifier: ISSN: 2041-6520