脱氢
化学
喹啉
烷基化
纳米颗粒
单斜晶系
催化作用
锰
粒径
相(物质)
核化学
组合化学
化学工程
无机化学
有机化学
晶体结构
物理化学
工程类
作者
Arnab Ghosh,Rajeev V. Hegde,Akshay S. Limaye,R. Thrilokraj,Siddappa A. Patil,Ramesh B. Dateer
摘要
The sustainable and environmentally benign biogenic synthesis of manganese‐oxide nanoparticles (MnO 2 NPs) in a single crystalline δ ‐phase and its subsequent synthetic utility have been described. The synthesized δ ‐MnO 2 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 ‐MnO 2 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 ‐MnO 2 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.
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