Eco-friendly mechanochemical preparation of Ag2O-MnO2/graphene oxide nanocomposite: an efficient and reusable yst for the base-free, aerial oxidation of alcohols was written by Adil, Syed Farooq;Assal, Mohamed E.;Khan, Mujeeb;Shaik, Mohammed Rafi;Kuniyil, Mufsir;Sekou, Doumbia;Dewidar, Ahmed Z.;Al-Warthan, Abdulrahman;Siddiqui, Mohammed Rafiq H.. And the article was included in Catalysts in 2020.Reference of 1777-82-8 This article mentions the following:
Recently, the development of eco-friendly mechanochem. approaches for the preparation of novel ysts with enhanced activity and selectivity has gained considerable attention. Herein, we developed a rapid and solvent-less mechanochem. method for the preparation of mixed metal oxide (Ag2O-MnO2) decorated graphene oxide (GRO)-based nanocomposites (Ag2O-MnO2/(X weight%)GRO), as the Ag2O-MnO2/(X weight%)GRO nanocomposite was fabricated by the phys. grinding of freshly prepared GRO and pre-annealed (300°C) mixed metal oxide nanoparticles (NPs) (Ag2O-MnO2) using an eco-friendly milling procedure. The as-prepared nanoysts were characterized by using various techniques. Furthermore, the nanocomposites were applied as a heterogeneous yst for the oxidation of alc. by employing gaseous O2 as an eco-friendly oxidant under base-free conditions. The mechanochem. obtained GRO-based composite exhibited noticeable enhancement in the surface area and ytic performance compared to the pristine Ag2O-MnO2. The results revealed that (1%)Ag2O-MnO2/(5 weight%)GRO yst exhibited higher specific performance (13.3 mmol.g-1.h-1) with a 100% conversion of benzyl alc. (BnOH) and >99% selectivity towards benzaldehyde (BnH) within 30 min. The enhancement of the activity and selectivity of GRO-based nanoyst was attributed to the presence of various oxygen-containing functional groups, a large number of defects, and a high sp. surface area of GRO. In addition, the as-prepared nanoyst also demonstrated excellent ytic activity towards the conversion of a variety of other alcs. to resp. carbonyls under optimal conditions. Besides, the yst ((1%)Ag2O-MnO2/(5 weight%)GRO) could be efficiently recycled six times with no noticeable loss in its performance and selectivity. In the experiment, the researchers used many compounds, for example, (2,4-Dichlorophenyl)methanol (cas: 1777-82-8Reference of 1777-82-8).
(2,4-Dichlorophenyl)methanol (cas: 1777-82-8) belongs to alcohols. A strong base can deprotonate an alcohol to yield an alkoxide ion (R―O−). For example, sodamide (NaNH2), a very strong base, abstracts the hydrogen atom of an alcohol. A multistep synthesis may use Grignard-like reactions to form an alcohol with the desired carbon structure, followed by reactions to convert the hydroxyl group of the alcohol to the desired functionality.Reference of 1777-82-8
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts