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In conclusion, we have developed an efcient and scale-up
method for the synthesis of diaryl disulfdes which relies
on a Fe3O4 nanoparticle-catalyzed coupling reaction. The
important feature of this method is its use of stable potas-
sium sulfdes salt as sulfur-donor reagent which has been
regarded as an inexpensive, stable, and solid reagent making
it free from foul-smelling thiols.
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In this work, Fe3O4 is used as a cheaper and reusable
catalyst. These nanoparticles that were collected with an
external magnet were also regarded as an excellent catalyst
for diaryl disulfdes synthesis. This method is more eco-
nomical, comprehensive and environmentally friendly than
previous methods.
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Acknowledgements We acknowledge the fnancial support of Ilam
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