1T-MoS₂catalysed reduction of nitroarenes and a one-pot synthesis of imines

Abstract

The earth-abundant transition metal dichalcogenides (TMDs) have emerged as an effective catalyst to improve the catalytic performance of heterogeneous catalysis, especially in the organic functional group conversion chemistry. The layered...

A General Synthesis Method for Covalent Organic Framework and Inorganic 2D Materials Hybrids

“…Ball milled hBN was selected as the representative example for further investigation due to the superior crystallinity exhibited by the resulting composites. We propose that through Lewis acid− base interaction, the electron-rich oxygen in the aldehyde coordinates with Lewis acid sites on TMD/hBN, 44 rendering the carbonyl carbons more electrophilic and facilitating nucleophilic attack by amine groups. 35,37 This interaction was further revealed by the FT-IR analysis.…”

3D Porous MoS2-Decorated Reduced Graphene Oxide Aerogel as a Heterogeneous Catalyst for Reductive Transformation Reactions

“…The reduction of benzaldehyde in a weak base such as NaHCO 3 (pH = ∼8.5) is carried out via a transfer hydrogenation mechanism. Initially, NaHCO 3 in the presence of MoS 2 -rGOA and a protic solvent (MeOH) gets converted to HCO 2 – , which consequently binds to the surface of MoS 2 -rGOA and makes the surface hydrogen-rich. , Later, methanol, as a solvent, along with HCO 2 – , acts as a hydrogen transfer species, as shown in Figure a, and proceeds to get the desired benzyl alcohol as a product, and the mechanism can be considered as the base-mediated Meerwein–Ponndorf–Verley reduction type. , However, in the case of the reduction of nitrobenzene to aniline, the reaction is initiated by the adsorption of hydrazine over the surface of MoS 2 -rGOA (making the surface hydrogen-rich), which leads to the simultaneous production of hydrogen by the dissociation of hydrazine in the presence of the protic solvent (H 2 and N 2 ). ,, Afterward, nitrobenzene gets converted to nitrosobenzene by using hydrogen present on the catalyst’s surface and subsequently producing hydroxylamine. After that, this hydroxylamine is involved in proton transfer and leads to the formation of aniline, as shown in Figure b.…”

“…64,65 However, in the case of the reduction of nitrobenzene to aniline, the reaction is initiated by the adsorption of hydrazine over the surface of MoS 2 -rGOA (making the surface hydrogen-rich), which leads to the simultaneous production of hydrogen by the dissociation of hydrazine in the presence of the protic solvent (H 2 and N 2 ). 43,66,67 Afterward, nitrobenzene gets converted to nitrosobenzene by using hydrogen present on the catalyst's surface and subsequently producing hydroxylamine. After that, this hydroxylamine is involved in proton transfer and leads to the formation of aniline, as shown in Figure 4b.…”

Importance of a nano-sized molybdenum composite synthesized using a microwave oven in the sorption enhancement of Au(iii) from the aqueous phase

“…Given that the N content in MoCOM is only 2.2%, a much higher N content in CS-MoCOM-Th relative to that in MoCOM cannot be fully attributed to embedment of this composite. It is most likely that the embedded MoCOM facilitated the grafting reaction between chitosan in CS-MoCOM-Th and thiourea by promoting dehydration, 58 which is the last step to create the Schiff base structure, thus increasing the N content in CS-MoCOM-Th. In summary, the nanofiber mat CS-MoCOM-Th with embedded MoCOM rich in N, S, and Mo was successfully synthesized by the electrospinning technique.…”