Advantages in Using Inexpensive CO2 to Favor Photocatalytic Oxidation of Benzylamines

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DOI

  • Yevheniia Markushyna, Max Planck Institute of Colloids and Interfaces
  • ,
  • Paolo Lamagni, Max Planck Institute of Colloids and Interfaces
  • ,
  • Jacopo Catalano
  • Nina Lock
  • Guigang Zhang, Max Planck Institute of Colloids and Interfaces
  • ,
  • Markus Antonietti, Max Planck Institute of Colloids and Interfaces
  • ,
  • Aleksandr Savateev, Max Planck Institute of Colloids and Interfaces

In this work, we investigate using carbon dioxide (CO2) as an inexpensive reaction medium during the photocatalytic oxidative coupling of primary amines to the corresponding imines. As a model system, we study the reaction of benzylamines in acetonitrile over a potassium poly(heptazine imide) photocatalyst (K-PHI). We use CO2 or argon (Ar) to saturate the reaction solution and the reactor headspace, and blue light (461 nm) to drive the reaction. When compared to the more expensive Ar, CO2 boosts the conversion rate by creating a reaction intermediate with better electron donor properties. We also validate the influence of water content on the imine formation efficiency, and we observe higher catalytic activity of K-PHI, compared to a standard mesoporous graphitic carbon nitride (mpg-CN).

OriginalsprogEngelsk
TidsskriftACS Catalysis
Vol/bind10
Nummer13
Sider (fra-til)7336-7342
Antal sider7
ISSN2155-5435
DOI
StatusUdgivet - 2020

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