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  Red edge effect and chromoselective photocatalysis with amorphous covalent triazine-based frameworks

Zou, Y., Abednatanzi, S., Gohari Derakhshandeh, P., Mazzanti, S., Schüßlbauer, C. M., Cruz, D., et al. (2022). Red edge effect and chromoselective photocatalysis with amorphous covalent triazine-based frameworks. Nature Communications, 13: 2171. doi:10.1038/s41467-022-29781-9.

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 Creators:
Zou, Yajun1, Author              
Abednatanzi, Sara, Author
Gohari Derakhshandeh, Parviz, Author
Mazzanti, Stefano1, Author              
Schüßlbauer, Christoph M., Author
Cruz, Daniel, Author
Van Der Voort, Pascal, Author
Shi, Jian-Wen, Author
Antonietti, Markus2, Author              
Guldi, Dirk M., Author
Savateev, Aleksandr1, Author              
Affiliations:
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: Chromoselective photocatalysis offers an intriguing opportunity to enable a specific reaction pathway out of a potentially possible multiplicity for a given substrate by using a sensitizer that converts the energy of incident photon into the redox potential of the corresponding magnitude. Several sensitizers possessing different discrete redox potentials (high/low) upon excitation with photons of specific wavelength (short/long) have been reported. Herein, we report design of molecular structures of two-dimensional amorphous covalent triazine-based frameworks (CTFs) possessing intraband states close to the valence band with strong red edge effect (REE). REE enables generation of a continuum of excited sites characterized by their own redox potentials, with the magnitude proportional to the wavelength of incident photons. Separation of charge carriers in such materials depends strongly on the wavelength of incident light and is the primary parameter that defines efficacy of the materials in photocatalytic bromination of electron rich aromatic compounds. In dual Ni-photocatalysis, excitation of electrons from the intraband states to the conduction band of the CTF with 625 nm photons enables selective formation of C‒N cross-coupling products from arylhalides and pyrrolidine, while an undesirable dehalogenation process is completely suppressed.

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Language(s): eng - English
 Dates: 2022-04-212022
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: DOI: 10.1038/s41467-022-29781-9
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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
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Publ. Info: London : Sprinter Nature Limited
Pages: 2171 Volume / Issue: 13 Sequence Number: 2171 Start / End Page: - Identifier: ISSN: 2041-1723