Hexaazatriphenylene doped carbon nitrides—Biomimetic photocatalyst with superior oxidation power

Kurpil, Bogdan; Savateev, Aleksandr; Papaefthimiou, Vasiliki; Zafeiratos, Spyridon; Heil, Tobias; Ozenler, Sibel; Dontsova, Dariya; Antonietti, Markus

doi:10.1016/j.apcatb.2017.06.036

Cited by 67 publications

(35 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Not only small functional groups but also large functional units can be introduced into the CN‐framework. One example of this is when a hexaazatriphenylene unit was installed in a CN‐structure, which significantly narrowed the band gap . Doping the CN‐material with carbon‐rich molecules showed not only narrowing of the band gap, but also enhances the conductivity of the semiconductor .…”

Section: Synthesis and Properties Of Carbon Nitridesmentioning

confidence: 99%

Organic Photocatalysis: Carbon Nitride Semiconductors vs. Molecular Catalysts

2019

Self Cite

View full text Add to dashboard Cite

The development of novel chemical transformations calls for environmentally friendly synthetic methods. Visible light photoredox catalysis has gained attention as a versatile tool to address these challenges. Due to the well‐defined structure of homogeneous transition metal‐based catalysts and organic dyes, they have been widely used to drive a wide variety of organic transformations. On the other hand, due to low cost, simple preparation procedure, and chemical stability of carbon nitride semiconductors, they have been known almost exclusively in environmental applications and water splitting. Until recently the applicability of carbon nitride semiconductors in organic synthesis has remained hidden from the broad community of organic chemists. In this review, we summarize reactions mediated by heterogeneous carbon nitride photocatalysts and common homogeneous photocatalysts in the same organic reactions, such as carbon‐carbon or carbon‐heteroatom bond formation reactions. We compare performance of both groups of catalysts in the discussed organic reactions.

show abstract

Section: Synthesis and Properties Of Carbon Nitridesmentioning

confidence: 99%

Organic Photocatalysis: Carbon Nitride Semiconductors vs. Molecular Catalysts

2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…The synthesis of hexaazatriphenylene-hexacarbonitrile (HAT-CN) was carried out according to a previously described procedure. 42 Hexaketocyclohexane octahydrate (4 g, 12.6 mmol) and diaminomaleonitrile (10.88 g, 100.8 mmol) were reuxed in acetic acid (AcOH, 150 mL) for 2 h. The black suspension was ltered off while hot and washed with hot AcOH (3 Â 25 mL) resulting in a black solid. The solid was suspended in 30% HNO 3 (60 mL) and heated at 100 C for 3 h. The hot dark brown suspension was poured into ice water (200 mL) and cooled overnight.…”

Section: Materials Synthesismentioning

confidence: 99%

Controlling the strength of interaction between carbon dioxide and nitrogen-rich carbon materials by molecular design

Walczak

Savateev

Heske

et al. 2019

Sustainable Energy Fuels

Self Cite

View full text Add to dashboard Cite

show abstract

“…solved the structure of K‐PHI using transmission electron microscopy, while 13 C‐ 15 N 2D HETCOR spectrum confirmed that negative charge is localized at the deprotonated imide bridge between neighboring heptazine units . Furthermore, X‐Ray photoelectron spectroscopy (XPS) can be used to confirm the presence of deprotonated nitrogen atoms in the structure of K‐PHI as a signal at 396.6 eV in N 1s spectrum . Combination of these techniques can differentiate between metal intercalated carbon nitrides, resembling crown ether like supramolecular assemblies, from materials with defined K−N ionic bonds.…”

Section: Introductionmentioning

confidence: 97%

Ionic Carbon Nitrides in Solar Hydrogen Production and Organic Synthesis: Exciting Chemistry and Economic Advantages

Savateev

Antonietti

2019

ChemCatChem

Self Cite

View full text Add to dashboard Cite

Molecular photoredox complexes from the platinum group paved the way of organic photocatalysis. However, high price and difficulties related to removal and recycling hamper application of such complexes on the larger scale. Carbon nitride semiconductor photocatalysts are deprived at large extent of such limitations. Herein, we summarize application of ionic carbon nitrides in photocatalysis. A salt-like structure of ionic carbon nitrides comprising negatively charged poly (heptazine imide) anion and positively charged alkali metal cations gives rise to a number of unique properties and high activity in photocatalysis. The performance of ionic carbon nitrides in H 2 generation is up to 100 times higher compared with the covalent graphitic carbon nitrides. Eleven photocatalytic reactions mediated by ionic carbon nitrides and their long-lived radicals are reviewed. Economy of using carbon nitride photocatalysts in comparison with the photoredox complexes from the platinum group has been analyzed.

show abstract

Hexaazatriphenylene doped carbon nitrides—Biomimetic photocatalyst with superior oxidation power

Cited by 67 publications

References 46 publications

Organic Photocatalysis: Carbon Nitride Semiconductors vs. Molecular Catalysts

Organic Photocatalysis: Carbon Nitride Semiconductors vs. Molecular Catalysts

Controlling the strength of interaction between carbon dioxide and nitrogen-rich carbon materials by molecular design

Ionic Carbon Nitrides in Solar Hydrogen Production and Organic Synthesis: Exciting Chemistry and Economic Advantages

Contact Info

Product

Resources

About