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  Potassium poly(heptazine imide) : transition metal-free solid state triplet sensitizer in cascade energy transfer and [3+2]-cycloadditions

Savateev, A., Tarakina, N. V., Strauß, V., Hussain, T., ten Brummelhuis, K., Vadillo, S., et al. (2020). Potassium poly(heptazine imide): transition metal-free solid state triplet sensitizer in cascade energy transfer and [3+2]-cycloadditions. Angewandte Chemie International Edition, 59(35), 15061-15068. doi:10.1002/anie.202004747.

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Genre: Zeitschriftenartikel
Andere : Kalium‐Polyheptazinimid: Ein übergangsmetallfreier Festkörper‐Triplett‐Sensibilisator in Kaskadenenergietransfer und [3+2]‐Cycloadditionen

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 Urheber:
Savateev, Aleksandr1, Autor           
Tarakina, Nadezda V.2, Autor           
Strauß, Volker3, Autor           
Hussain, Tanveer, Autor
ten Brummelhuis, Katharina4, Autor           
Vadillo, Sánchez, Autor
Manuel, José, Autor
Markushyna, Yevheniia1, Autor           
Mazzanti, Stefano1, Autor                 
Tyutyunnik, Alexander P., Autor
Walczak, Ralf5, Autor           
Oschatz, Martin5, Autor           
Guldi, Dirk, Autor
Karton, Amir, Autor
Antonietti, Markus6, Autor           
Affiliations:
1Aleksandr Savateev, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2421702              
2Nadezda V. Tarakina, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2522693              
3Volker Strauß, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_3025555              
4Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863288              
5Martin Oschatz, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2364733              
6Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863321              

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Schlagwörter: carbon nitride, potassium poly(heptazine imide), solid state sensitizer, Singlet oxygen, organic photocatalysis
 Zusammenfassung: Polymeric carbon nitride materials have been successfully used in numerous light-to-energy conversion applications ranging from photocatalysis to optoelectronics. For a new application and modelling, we first refined the crystal structure of potassium poly(heptazine imide) (K-PHI) – a benchmark carbon nitride material in photocatalysis – by means of X-ray powder diffraction and transmission electron microscopy. Using the crystal structure of K-PHI, periodic DFT calculations were performed to calculate the density-of-states and localize intra band states (IBS). IBS were found to be responsible for the enhanced K-PHI absorption in the near IR region, to serve as electron traps, and to be useful in energy transfer reactions. Once excited with visible light, carbon nitrides, beside the direct recombination, can also undergo singlet-triplet intersystem crossing. We utilized the K-PHI centered triplet excited states to trigger a cascade of energy transfer reactions and, in turn, to sensitize, for example, singlet oxygen (1O2) as a starting point to synthesis up to 25 different N-rich heterocycles.

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Sprache(n): eng - English
 Datum: 2020-05-152020
 Publikationsstatus: Erschienen
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 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1002/anie.202004747
DOI: 10.1002/ange.202004747
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Titel: Angewandte Chemie International Edition
  Kurztitel : Angew. Chem., Int. Ed.
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: Weinheim : Wiley-VCH
Seiten: - Band / Heft: 59 (35) Artikelnummer: - Start- / Endseite: 15061 - 15068 Identifikator: ISSN: 1433-7851