ChemInform Abstract: Magnetite (Fe3O4) Nanoparticles: An Efficient and Recoverable Catalyst for the Synthesis of Alkynyl Chalcogenides (Selenides and Tellurides) from Terminal Acetylenes and Diorganyl Dichalcogenides. Issue 39 (23rd September 2014) - Godoi, Marcelo; Liz, Daiane G.; Ricardo, Eduardo W.; Rocha, Manuela S. T.; Azeredo, Juliano B.; Braga, Antonio L.