Copper nanoparticles in ionic liquids: Recyclable and efficient catalytic system for 1,3-dipolar cycloaddition reaction

Comparative Synthesis of Cu and Cu2O Nanoparticles from Different Copper Precursors in an Ionic Liquid or Propylene Carbonate

“…[7] Synthesis conditions such as temperature, solvent, reducing agent, and stabilizing agent can influence the size, size distribution, and shape of M-NPs. [8] Copper and copper oxide nano-to micromaterials are studied for catalytic CO oxidation, [9][10][11][12][13][14] alkyne-azide cycloadditions, [15][16][17] aryl-sulfur bond formation, [18,19] and amination of aryl halides, [20][21][22][23] among others. [24][25][26] Copper(I) oxide, Cu 2 O, is a metal oxide semiconductor with promising applications in solar energy conversion.…”

Copper nanoparticle heterogeneous catalytic ‘click’ cycloaddition confirmed by single-molecule spectroscopy

“…There is an interest in improving efficiency, reducing cost as well as byproducts, and discovering new catalysts 5,[7][8][9][10][11][12] for this powerful conjugation tool. Copper nanoparticles (CuNP) are being explored as click catalysts in the hope of improving reusability and efficiency compared to their solution counterparts [13][14][15][16][17][18][19][20][21] . Despite recent proof-of-concept examples of CuNP-catalysed click reactions, few investigate the catalytic activity of CuNP, and generally it is difficult, if not impossible, to establish if the true catalyst is the CuNP, copper ions leaching from it 22 , or if the CuNP acts as a reductant converting Cu(II) to Cu(I).…”

Aminopropyl-silica-supported Cu nanoparticles: An efficient catalyst for continuous-flow Huisgen azide-alkyne cycloaddition (CuAAC)

“…Different copper sources have been described for the CuAAC, including simple halide salts and coordination complexes in homogeneous or heterogeneous form [13][14][15][16][17][18][19][20][21][22]. From the last decade, nanostructured Cu systems are being explored in both homogeneous and heterogeneous form in CuAAC reactions [13,14,[23][24][25][26][27][28][29][30]. The combination of supported Cu-based catalysts and flow reactor technologies represents a step forward in terms of reliability, time, safety, and costs over traditional batch reaction conditions.…”