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Urea modified tryptophan based in situ reducing and stabilizing agent for fabrication of gold nanoparticles as Suzuki-Miyaura cross-coupling catalyst in water

Abstract

Urea modified tryptophan have been used as in situ reducing and stabilizing agent for fabrication of gold nanoparticles in water. The tryptophan side chain NH has used for reduction of gold ions in HAuCl4 to metallic gold and carboxylic acid functionality helps to stabilize the gold nanoparticles. This was confirmed by controlled reaction with urea modified leucine which failed to form any gold nanoparticle. The resultant gold nanoparticles have characterized by various spectroscopic techniques such as UV-visible spectroscopy, FT-IR spectroscopy and microscopic techniques such as FESEM and TEM. Moreover, we have shown that the urea modified tryptophan stabilized gold nanoparticles are catalyzing Suzuki-Miyaura cross-coupling reaction. The gold nanoparticles catalyzed Suzuki-Miyaura cross-coupling reaction between 4-bromobenzoic acid with phenylboronic acid in water provide 92% yield in 40 minutes. The high efficiency exhibited by the gold nanoparticles catalyst was effectively translated to a large number of Suzuki-Miyaura reaction between halides with phenylboronic acid.The results may inspire further research on golden catalysis in water.

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Publication details

The article was received on 08 Oct 2018, accepted on 01 Jan 2019 and first published on 07 Jan 2019


Article type: Paper
DOI: 10.1039/C8NA00273H
Citation: Nanoscale Adv., 2019, Accepted Manuscript
  • Open access: Creative Commons BY license
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    Urea modified tryptophan based in situ reducing and stabilizing agent for fabrication of gold nanoparticles as Suzuki-Miyaura cross-coupling catalyst in water

    S. Sasmal, M. Debnath, S. Nandi and D. Haldar, Nanoscale Adv., 2019, Accepted Manuscript , DOI: 10.1039/C8NA00273H

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