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Ultrasound‐Mediated Synthesis of Novel α‐Aminophosphonates Using Graphene Nanosheets‐Silver Nanoparticles (GNS‐AgNPs) as a Recyclable Heterogeneous Catalyst
Author(s) -
Rasal Sarika A,
Tamore Milind S,
Shimpi Navinchandra G
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201803201
Subject(s) - sodium borohydride , silver nanoparticle , graphene , silver nitrate , thermogravimetric analysis , reducing agent , catalysis , fourier transform infrared spectroscopy , materials science , nuclear chemistry , chemistry , nanoparticle , inorganic chemistry , chemical engineering , nanotechnology , organic chemistry , engineering
A series of novel α‐aminophosphonate derivatives were synthesized via simple and an efficient method from the three‐component condensation reaction of 5‐aminoindan or 3,4‐(methylenedioxy)aniline, aromatic aldehydes and diethyl phosphite by employing graphene nanosheets‐silver nanoparticles (GNS‐AgNPs) as catalyst under ultrasonication and solvent‐free condition. GNS‐AgNPs was prepared in situ by simultaneous reduction of graphene oxide (GO) and silver nitrate (AgNO 3 ) using sodium borohydride (NaBH 4 ) as a reducing agent. The surface characterization of GNS‐AgNPs was done using X‐ray diffraction (XRD), Fourier transform infrared (FTIR), UV–Vis spectroscopy (UV–Vis), Thermogravimetric analysis (TGA), Raman spectroscopy and Field emission scanning electron microscopy (FE‐SEM). The GNS‐AgNPs are recyclable up to fifth run with minimal loss of its activity. Convenient operational simplicity, mild conditions, excellent yields of products, consistent performance and the reusability of catalyst makes this protocol feasible and attractive.