Copper(i) oxide nanoparticle-mediated C–C couplings for synthesis of polyphenylenediethynylenes: evidence for a homogeneous catalytic pathway

Abstract

Polyphenylenediethynylenes have been synthesized using copper(i) oxide nanocatalysts under ligandless conditions, mild base, and atmospheric air as the oxidant in good yield and number average molecular weight.

Structure–Property–Performance Relationships of Cuprous Oxide Nanostructures for Dielectric Mie Resonance-Enhanced Photocatalysis

“…Microemulsion technique is used for the synthesis of smaller Cu 2 O spherical nanoparticles of average diameters in the range of 35–45 nm. , For the syntheses of larger Cu 2 O spherical nanoparticles of 145 nm average diameter and Cu 2 O nanocubes of tunable edge lengths in the range of 90–450 nm, the chemical reduction method is used . The synthesis temperatures of ∼55 and ∼20 °C are used for the synthesis of larger Cu 2 O nanospheres and nanocubes, respectively.…”

Structure–Property–Performance Relationships of Dielectric Cu2O Nanoparticles for Mie Resonance-Enhanced Dye Sensitization

“…The procedures followed for FDTD simulations, syntheses (Scheme a–c) and characterizations of Cu 2 O nanospheres and nanocubes, ,, and MB dye-sensitization and -degradation experiments are detailed in the Supporting Information. Briefly, Cu 2 O nanospheres with average diameters of 37 and 145 nm and Cu 2 O nanocubes with average edge lengths of 92, 165, and 325 nm were synthesized using the synthesis protocols reported in our previous contributions. ,, The sizes and Cu 2 O phases of the nanostructures were confirmed using TEM and SEM and X-ray diffraction patterns, respectively (Figure S1a,b in Supporting Information). The performance of the Cu 2 O nanostructures toward MB dye sensitization was evaluated through the measurement of the rate of MB degradation that occurs in the MB dye-sensitization region.…”

A detailed theoretical investigation to unravel the molecular mechanism of the ligand-free copper-catalyzed Suzuki cross-coupling reaction

“…7,27 In this context, copper catalysts, which are safer and cheaper, and have a higher relative abundance than palladium, have emerged as an alternative in cross-coupling reactions. 8,9,12,24 However, copper catalysts are far from replacing palladium catalysts in cross-coupling reactions despite their merits such as low cost, less toxicity, and substrate scope. Being used in the pioneering works of Glaser 10 and Ullmann, 11 low catalytic turnover, undesired product formation, requirement of harsh reaction conditions, and higher amounts of catalysts and ligands limited the utility of copper catalysts in cross-coupling reactions.…”