Greener Route for Synthesis of aryl and alkyl-14H-dibenzo [a.j] xanthenes using Graphene Oxide-Copper Ferrite Nanocomposite as a Recyclable Heterogeneous Catalyst.

ABSTRACT: A facile, efficient and environmentally-friendly protocol for the synthesis of xanthenes by graphene oxide based nanocomposite (GO-CuFe₂O₄) has been developed by one-pot condensation route. The nanocomposite was designed by decorating copper ferrite nanoparticles on graphene oxide (GO) surface via a solution combustion route without the use of template. The as-synthesized GO-CuFe₂O₄ composite was comprehensively characterized by XRD, FTIR, Raman, SEM, EDX, HRTEM with EDS mapping, XPS, N₂ adsorption-desorption and ICP-OES techniques. This nanocomposite was then used in an operationally simple, cost effective, efficient and environmentally benign synthesis of 14H-dibenzo xanthene under solvent free condition. The present approach offers several advantages such as short reaction times, high yields, easy purification, a cleaner reaction, ease of recovery and reusability of the catalyst by a magnetic field. Based upon various controlled reaction results, a possible mechanism for xanthene synthesis over GO-CuFe₂O₄ catalyst was proposed. The superior catalytic activity of the GO-CuFe₂O₄ nanocomposite can be attributed to the synergistic interaction between GO and CuFe₂O₄ nanoparticles, high surface area and presence of small sized CuFe₂O₄ NPs. This versatile GO-CuFe₂O₄ nanocomposite synthesized via combustion method holds great promise for applications in wide range of industrially important catalytic reactions.

SUBMITTER: Kumar A 

PROVIDER: S-EPMC5324042 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature