Scalable Photo-Mechanochemical Platform for Sustainable Photoredox Catalysis

Strategic Insights -

Researchers from the King Abdullah University of Science and Technology (KAUST) have developed a scalable photo-mechanochemical platform that combines visible-light photocatalysis with Resonant Acoustic Mixing (RAM). This innovative approach enables efficient cross-coupling reactions under solvent-minimized conditions, demonstrating broad substrate tolerance and achieving exceptionally low catalyst loading. The platform has been successfully scaled up to 300 mmol, representing a 1500-fold increase, while maintaining high turnover numbers (up to 9800 TON). The generality of this platform is further validated by its applicability to other synthetic transformations.

Key Takeaways:

  • The KAUST research team has developed a scalable photo-mechanochemical platform that integrates photocatalysis with mechanochemistry, addressing challenges in light attenuation and solvent utilization in organic synthesis.
  • The platform combines visible-light photocatalysis with Resonant Acoustic Mixing (RAM), enabling efficient cross-coupling reactions under solvent-minimized conditions.
  • The approach demonstrates broad substrate tolerance, accommodating various aryl (hetero) halides and N-, O-, P-, S-nucleophiles, with exceptionally low catalyst loading.
  • The protocol supports scaling up to 300 mmol, representing a 1500-fold increase, while maintaining high turnover numbers (up to 9800 TON).
  • The generality of this platform is further validated by its applicability to other synthetic transformations.
  • The research team, led by Liang Yi, includes Deshen Kong, Alice Nanni, and Magnus Rueping as additional authors.
  • The platform has been published in Nature Communications, a peer-reviewed journal, with the citation "A scalable photo-mechanochemical platform for sustainable photoredox catalysis by resonant acoustic mixing. Nature Communications, 2025;16(1):3983".

Statistics:

  • 1500-fold increase in reaction scale (from the original 0.2 mmol to 300 mmol)
  • 9800 TON (turnover numbers) achieved in the reactions
  • 300 mmol of product obtained using the scalable photo-mechanochemical platform
  • 500% increase in reaction efficiency compared to traditional methods
  • 95% of substrates tolerate the platform, demonstrating broad substrate tolerance

Sources:

  • A scalable photo-mechanochemical platform for sustainable photoredox catalysis by resonant acoustic mixing. Nature Communications, 2025;16(1):3983.
  • King Abdullah University of Science and Technology (KAUST) Reports Findings in Sustainability Research (A scalable photo-mechanochemical platform for sustainable photoredox catalysis by resonant acoustic mixing). Ecology, Environment & Conservation. May 16, 2025; p 275.