Anchored N,O-Cu complex over Fe3O4@SiO2 as a highly efficient and reusable catalyst for C O coupling reaction

Biofilm Polysaccharide Display Platform: A Natural, Renewable, and Biocompatible Material for Improved Lipase Performance

“…Furthermore, the Fe appeared, which corresponded to the NH 2 bending vibration of the free NH 2 group. 30 The above results indicated that modified Fe 3 O 4 −SiO 2 −NH 2 nanoparticles were successfully synthesized. Amine modification would facilitate the easy immobilization of magnetic nanoparticles onto biofilm materials.…”

“…As shown in Figure d, the black curve represents the Fe 3 O 4 –SiO 2 nanoparticles and the red curve represents the amine-modified Fe 3 O 4 –SiO 2 nanoparticles. Comparing black and red curves, it was found that after amine modification, an absorption peak at 1677 cm –1 appeared, which corresponded to the NH 2 bending vibration of the free NH 2 group . The above results indicated that modified Fe 3 O 4 –SiO 2 –NH 2 nanoparticles were successfully synthesized.…”

Copper supported silica-based nanocatalysts for CuAAC and cross-coupling reactions

“…In 2019, Asadi et al 194 reported a Cu catalyst ( 34 ) for O -arylation, where catalyst ( 34 ) can be separated by an external magnet and reused. To satisfy the industrial needs, a low-cost ligand and metal ion with large turn-over frequency (TOF) are used compared with the earlier reported Pd catalyst.…”

Functionalization of graphene oxide with a hybrid P, N ligand for immobilizing and stabilizing economical and non-toxic nanosized CuO: an efficient, robust and reusable catalyst for the C–O coupling reaction inO-arylation of phenol

“…In recent times, immense scientific attention in the field of catalysis has been paid to the development of various heterogeneous and nanocatalysts, as they show high selectivity with high conversion rates under mild reaction conditions in conjunction with easy separation and recyclability. 1–7 The efficiency of a metal-based nanocatalyst depends indirectly upon the organic compound often termed as the capping agent, which is used as the stabilizer in the synthesis of nanoparticles. 8 The stabilizer plays an important role in regulating the size and shape of materials as well as in the prevention of aggregation and coalescence of these nanomaterials.…”

“…This method requires harsh reaction conditions such as a high temperature (>200 °C), excessive use of phenol, a long reaction time and use of a stoichiometric amount of copper. 59,60 To overcome these limitations, a variety of homogeneous, 61–64 heterogeneous and nanocatalytic 1–7 (nanoparticles of Pd, Cu, CuO, CuI, Ni, and Fe) systems have been developed. Among such systems, the use of noble transition metal (such as palladium) based catalysts is avoided in large scale or industrial applications due to their high cost and toxicity.…”