Surface modification of Fe 3 O 4 nanoparticles with triethoxyethylcyanide groups was used for the immobilization of palladium nanoparticles to produce Fe 3 O 4 /Ethyl-CN/Pd. The catalyst was characterized using Fourier transform infrared, wavelengthdispersive X-ray, energy-dispersive X-ray and X-ray photoelectron spectroscopies, field-emission scanning electron and transmission electron microscopies, and X-ray diffraction, vibrating sample magnetometry and inductively coupled plasma analyses. In this fabrication, cyano groups played an important role as a capping agent. The catalytic behaviour of Fe 3 O 4 /Ethyl-CN/Pd nanoparticles was measured in the Suzuki cross-coupling reaction of various aryl halides (Ar-I, Ar-Br, Ar-Cl) with phenylboronic acid in aqueous phase at room temperature. Interestingly, the novel catalyst could be recovered in a facile manner from the reaction mixture by applying an external magnet device and recycled seven times without any significant loss in activity.

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The newly synthesized catalyst consists of Fe 3O4/Ethyl-CN/Pd wherein the cyano groups play an important role as a capping agent. It is employed in Suzuki cross-coupling reaction of various aryl halides with phenylboronic acid in aqueous medium at room temperature. Interestingly, the novel catalyst can be easily recovered in a facile manner by an external magnet device and recycled seven times without significant loss in activity. -(ABBAS KHAKIANI, B.; POURSHAMSIAN, K.; VEISI*, H.; Appl. Organomet. Chem. 29 (2015) 5, 259-265, http://dx.doi.org/10.1002/aoc.3282 ; Dep. Chem., Payame Noor Univ., Tehran, Iran; Eng.) -B. Guendogan 34-125