Details

Autor(en) / Beteiligte

• Ghosh, Arnab
• Hegde, Rajeev V.
• Limaye, Akshay S.
• R., Thrilokraj
• Patil, Siddappa A.
• Dateer, Ramesh B.

Titel

Biogenic synthesis of δ‐MnO2 nanoparticles: A sustainable approach for C‐alkylation and quinoline synthesis via acceptorless dehydrogenation and borrowing hydrogen reactions

Ist Teil von

• Applied organometallic chemistry, 2023-07, Vol.37 (7), p.n/a

Ort / Verlag

Chichester: Wiley Subscription Services, Inc

Erscheinungsjahr

2023

Quelle

Wiley Online Library All Journals

Beschreibungen/Notizen

• The sustainable and environmentally benign biogenic synthesis of manganese‐oxide nanoparticles (MnO2 NPs) in a single crystalline δ‐phase and its subsequent synthetic utility have been described. The synthesized δ‐MnO2 NPs were characterized using scanning electron microscopy (SEM), energy dispersive X‐ray (EDX), and X‐ray diffraction (XRD) analysis techniques. The detailed analysis envisages the reduction of Mn(VII) to Mn(IV) was facilitated by various phytochemicals present in the aq. mango leaves extract, avoiding the use of external ligand source. The synthesized δ‐MnO2 NPs were perceived in a single delta (δ) monoclinic crystalline phase, wherein a spherical agglomerated morphology was displayed with a particle size of <5 nm. Further, the utility of newly developed δ‐MnO2 NPs was showcased for alpha‐keto‐alkylation and quinoline synthesis via hydrogen autotransfer and the acceptorless dehydrogenative coupling strategy. Moreover, a series of control experiments, mechanistic elucidation, catalyst recyclability, and a dye removal study were demonstrated. Herein, we report the sustainable and eco‐friendly biogenic synthesis of manganese‐oxide nanoparticles (MnO2 NPs) in a single crystalline δ‐phase. The synthesized catalyst is employed for the development of value added moieties (i.e., chalcone and quinolines). Furthermore, the catalyst is applied in the real‐time application like the dye adsorption process.