A new copper complex on graphene oxide: A heterogeneous catalyst for N‐arylation and C‐H activation

Abstract

Graphene oxide supported Cu (II) ligand complex (GO@AP/L‐Cu) has been synthesized and characterized by FT‐IR, Raman, PXRD, UV–Visible, TGA, XPS, FESEM, TEM, EDAX, Elemental mapping, BET, CHNS and AAS analysis. The complex has been found to be efficient and reusable heterogeneous catalyst for the N‐arylation and C‐H activation reactions, both the catalytic reactions were found to be simple, cleaner and give high yields (~ 90%) of product. The catalyst can be easily filtered out from the reaction mixture and reused up to four times without significant loss of catalytic activity. The reported method is economical and novel in the sense that aqueous medium was used for both the reactions and for the stability of the catalyst. All isolated organic products were fully characterized on the basis of their physical and spectral data.

Graphene Oxide Embedded Copper Composite as an Efficient Mordant to Enhance the Properties of Natural Dye Coated Cotton Fabric.

“…The peak at 1109 for C-N indicates the CG composite successfully modi ed with 8-HQ. (Agarwal et al, 2003;Mittal et al, 2020) The peaks at 525 cm-1 for the Cu-O bond show complex formation with dye and cotton. (Bhakare et al, 2021) The crystalline structure of the composite was examined by powder X-ray diffractometer (Shimadzu XRD-6100 using CuKα radiation=1.5405Å) with a scanning rate of 2° per min and 2 theta (θ) angle ranging from 20° to 80° at current 30.0 mA and voltage 40.0 kV.…”

“…(Goswami et al, 2003) The curve for 2-methyl-8hyrdoxy quinoline shown in Figure 2a iii a characteristic peak at 1580 cm-1 corresponding to the C=N, the peak at 3250 cm -1 denoting the O-H vibrations and peaks in the range of 1416 cm -1 denoting the C-O vibrations. (Mittal et al, 2020)The curve for the CHG composite shown in Figure 2a iv denotes the characteristic peak at around 1683 cm -1 for the C=O vibrations, (Palaskar et al, 2021) peak in the range of 1575 cm -1 representing the C=C and C=N linkage. The peak at around 3300 cm -1 denotes the O-H vibrations.…”

Vertically aligned carbon nanotubes, MoS2–rGo based optoelectronic hybrids for NO2 gas sensing

“…2a), a sharp absorption peak is observed at ~ 230 nm related to the π → π* transitions of the C-C bonds 24 . A small shoulder peak around 325 nm is also attributed to the n → π* transitions of the C = O bonds 24 . For rGo (Fig.…”

Carbon–nitrogen bond formation using modified graphene oxide derivatives decorated with copper complexes and nanoparticles

“…GO loaded with Cu(II) ligand complex (GO@AP/L‐Cu) was applied as a reusable heterogeneous catalyst for Chan–Lam coupling reaction of aniline derivatives with a wide range of arylboronic acids in the presence of KOH as base at 100°C for the preparation of the corresponding products in high yields (Scheme 12). [ 61 ] The GO@AP/L‐Cu catalyst was synthesized in three steps: In the first step, GO was treated with (3‐aminopropyl)trimethoxysilane (APTMS) to yield GO@AP. In the second step, GO@AP was reacted with 3‐(hydroxy(phenyl)methyl)but‐3‐en‐2‐one as ligand to form Schiff base (GO@AP/L).…”