A facile synthesis of clay – graphene oxide nanocomposite catalysts for solvent free multicomponent Biginelli reaction

Divya P. Narayanan, Anila Gopalakrishnan, Zahira Yaakob, Sankaran Sugunan, Binitha N. Narayanan

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

In the present study, clay – graphene oxide nanocomposite catalysts were successfully used for the first time in the multicomponent one pot organic synthesis. The facile development of the hybrid clay – graphene oxide nanocomposite has been achieved by a cost-effective method without the use of any surfactants. The partial reduction of graphene oxide, upon incorporation of clay layers and subsequent heat treatment, is evident from the X-ray diffraction patterns and FTIR spectra of the samples. X-ray photoelectron spectroscopy as well as 27Al and 29Si NMR spectral analyses provided useful information regarding the interaction between clay layers and graphene oxide through Si–O–C and Al–O–C bonding. The deconvoluted XPS spectrum of O (1s), Al (2p) and Si (2p) indicates the increased availability of acidic functionalities in the hybrid nanocomposite. FESEM and TEM photographs show the random distribution of the clay nanoflakes over the graphene oxide sheets and this may be the reason for the availability of more of the active sites for catalysis. Synthesis of 3,4-dihydropyrimidinones by the one pot Biginelli reaction was done over the present clay – graphene oxide heterogeneous catalysts with high product yield. Short time period of reaction and excellent reusability up to 8 repeated cycles under solvent free conditions are the key advantages of the present highly active hybrid nanocomposite clay – graphene oxide catalysts over most of the other reported catalysts used for Biginelli reaction.

Original languageEnglish
JournalArabian Journal of Chemistry
DOIs
Publication statusAccepted/In press - 1 Jan 2018

Fingerprint

Graphite
Oxides
Graphene
Nanocomposites
Clay
Catalysts
X ray photoelectron spectroscopy
Availability
Reusability
clay
Surface-Active Agents
Diffraction patterns
Catalysis
Surface active agents
Heat treatment
Nuclear magnetic resonance
Transmission electron microscopy
X ray diffraction
Costs

Keywords

  • Biginelli reaction
  • Clay – graphene oxide nanocomposite
  • Heterogeneous catalysts
  • Multicomponent reactions
  • Solvent free conditions

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

A facile synthesis of clay – graphene oxide nanocomposite catalysts for solvent free multicomponent Biginelli reaction. / Narayanan, Divya P.; Gopalakrishnan, Anila; Yaakob, Zahira; Sugunan, Sankaran; Narayanan, Binitha N.

In: Arabian Journal of Chemistry, 01.01.2018.

Research output: Contribution to journalArticle

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