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Au Nanostructures with Controlled Morphology, Biosynthesized from Garcinia cowa Fruit Extract, and Their Use in Microwave‐Mediated Bisindole Synthesis
Author(s) -
Gohain Shivanee B.,
Thakur Ashim J.
Publication year - 2021
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202100157
Subject(s) - nanoparticle , yield (engineering) , materials science , molecule , reducing agent , nanostructure , homogeneous , nanotechnology , chemical engineering , organic chemistry , chemistry , composite material , mathematics , engineering , combinatorics
Au nanoparticles (NPs) of controlled morphology have been synthesised through an eco‐friendly biogenic method utilizing the aqueous fruit extract of Garcinia cowa at room temperature. The bio extract executes dual role of reducing agent and stabilizing agent to add excellent stability to the synthesized colloidal Au NPs. The variation of particle size and morphology of Au nanostructures with respect to the quantitative part of the bio‐extract were studied. After microscopic and spectroscopic characterization, further application of the Au NPs synthesized via green method in the preparation of complex organic molecules was studied. The Au NPs were employed as homogeneous catalyst in coupling of substituted indole and aromatic aldehydes to yield bisindolylmethanes, which are known precursors of anti‐cancer bioactive molecules. In addition, microwave irradiation makes the coupling reaction more sustainable with very short reaction time of 40 secs.