محمود تاجبخش

Magnetic graphene oxide (MGO) was functionalized with 5-amino-1,10-phenanthroline (APhen) in the presence of N,N’ -dicyclohexylcarbodiimide (DCC). MGO@APhen was characterized by FT-IR, CHN, FE-SEM, EDS, element mapping images, TEM, XRD, TGA, and VSM. MGO@APhen was used in C–N coupling re- action of amides and N -heterocycles with various aryl halides. The results showed that MGO@APhen in the presence of CuI acts as an efficient heterogeneous catalyst leading to satisfactory yield of N -arylated products. Due to the magnetization properties of MGO@APhen, it was easily separated by a supermagnet and successfully reused in the next cycle of coupling reactions. In addition, MGO@APhen demonstrated excellent performance in adsorption of Pb(II) and Ag(I) ions. Adsorption kinetics fitted well with pseudo - second-order model and the adsorption isotherm follows Langmuir model, and the adsorption process was exothermic and spontaneous. Finally, the magnetically separated adsorbent was desorbed and suc- cessfully used in the adsorption of heavy metal ions in the subsequent cycles.