Synthesis and characterization of highly efficient and recoverable Cu@MCM-41-(2-hydroxy-3-propoxypropyl) metformin mesoporous catalyst and its uses in Ullmann type reactions

Abstract

The functionalized MCM-41-(2-hydroxy-3-propoxypropyl) metformin was prepared and anchored by copper ions to employ as a catalyst for the Ullmann C-X coupling reaction. The catalyst was characterized by Fourier-transform infrared spectroscopy, thermogravimetric analysis, X-ray diffraction, transmission electron microscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy measurements and, N2 adsorption–desorption isotherms. The benefits of this catalyst are the use of inexpensive and non-toxic metformin ligand, easy catalyst/product separation, and catalyst recycling. The catalyst can be reused at least for five repeated cycles without a significant loss of its catalytic activity or metal leaching.

Mesoporous Silica MCM-41 from Fly Ash as a Support of Bimetallic Cu/Mn Catalysts for Toluene Combustion

“…Moreover, the values obtained from N 2 adsorption-desorption experiments are consistent with those from XRD calculations, implying that the modification to the MCM-41 did not cause the destruction of the material. The obtained results remain in line with the literature reports [25,28].…”

BTEXS Removal From Aqueous Phase by MCM-41 Green Synthesis Using Rice Husk Silica

“…The structural data of the MCM-41 catalyst nanoparticles are summarized in (Table 3). The obtained results confirm the results of the research [62].…”

Fe3O4 supported [Cu(ii)(met)(pro-H)2] complex as a novel nanomagnetic catalytic system for room temperature C–O coupling reactions

“…On the other hand, the presence of an NH 2 group at the end of the molecule chain gives it a special ability for further functionalization. [35][36][37] Metformin was previously used as a biguanide ligand in copper-catalyzed Ullmann-type C-N and C-O cross-couplings that show its ability in these types of reactions. 38 To address the above-mentioned deciencies, we focus on the immobilization of metformin on the nanomagnetic Fe 3 O 4 MNPs and its complexation with copper nitrate trihydrate and L-proline to generate the desired biguanide-copper catalyst for Ullmann-type cross-coupling of aryl halides with phenolwhich results in generating the diaryl ethers under green conditions.…”