Modular, Self-Assembling Metallaphotocatalyst for Cross-Couplings Using the Full Visible-Light Spectrum

The combination of nickel and photocatalysis has expanded the scope of cross-coupling reactions, traditionally hindered by narrow light absorption and potential side reactions from high-energy photons. This challenge is addressed by a self-assembling catalyst system where a nickel catalyst is immobilized on dye-sensitized titanium dioxide. This approach enables efficient catalysis of carbon–heteroatom and carbon–carbon bond formations across the entire visible light spectrum, mitigating selectivity issues associated with shorter wavelengths. By utilizing dyes previously deemed unsuitable, this modular approach enhances the capabilities of metallaphotocatalysis beyond current limitations.