Facilitating room-temperature Suzuki coupling reaction with light: Mott-Schottky photocatalyst for C-C-coupling

Abstract

The Suzuki coupling reaction is one of the most practiced classes of catalytic C-C bond formation. The development of new means of activating molecules and bonds over old catalysts for C-C bond formation is a fundamental objective for chemists. Here, we report the room-temperature C-C bond formation over heterogeneous Pd catalysts by light-mediated catalyst activation. We employ stimulated electron transfer at the metal-semiconductor interface from optically active mesoporous carbon nitride nanorods to Pd nanoparticles. This photocatalytic pathway is highly efficient for coupling aryl halides with various coupling partners with high activity and selectivity under photo irradiation and very mild conditions.

Visible-Light-Driven Photocatalytic Suzuki–Miyaura Coupling Reaction on Mott–Schottky-type Pd/SiC Catalyst

“…Li et al reported a Mott−Schottky-type photocatalyst, C 3 N 4 -supported Pd nanoparticles, for Suzuki−Miyaura coupling reactions under UV irradiation. 11,12 In the Pd/C 3 N 4 catalyst, Pd nanoparticles obtain photogenerated electrons via the Mott−Schottky heterojunction between Pd and C 3 N 4 . Cubic silicon carbide (β-SiC) possesses a suitable band gap (∼2.4 eV) and can absorb visible light.…”

Green Suzuki–Miyaura coupling reaction catalyzed by palladium nanoparticles supported on graphitic carbon nitride

“…The Pd-catalysed Suzuki-Miyaura coupling reaction has become a central tool for the construction of C-C bonds, widely used to synthesize natural products, non-natural products, and other bioactive compounds, as well as some advanced materials [1][2][3][4]. Traditionally, the C-C coupling reactions are carried out in organic solvents such as tetrahydrofuran and diethyl ether in the presence of Pd(II) or Pd(0) complexes having organic ligands at higher temperatures [5][6][7]. However, there are some glaring disadvantages in this case.…”

Eco-Friendly Physical Activation Methods for Suzuki–Miyaura Reactions

“…Basing on the mechanism of activation of homogeneous Pd-containing catalysts which depend on the electron-enrichment caused by the introduction of special ligands, Li et al [181] were interested in increasing the activity of heterogeneous Pd nanoparticle-based catalysts by increasing their electron density via support effects. The authors employed the stimulated electron transfer at the metal-semiconductor interface from optically active mesoporous carbon nitride (g-C 3 N 4 ) nanorods to Pd nanoparticles.…”