TY - JOUR ID - 39394 TI - Palladium nanoparticles immobilized on multifunctional ‎hyperbranched polyglycerol-grafted magnetic nanoparticles as a ‎sustainable and efficient catalyst for C-C coupling reactions JO - Nanochemistry Research JA - NCR LA - en SN - 2538-4279 AU - Amini, Mina AU - Hajjari, Marzieh AU - Landarani-Isfahani, Amir AU - Mirkhani, Valiollah AU - Moghadam, Majid AU - Tangestaninejad, Sharam AU - Mohammadpoor-Baltork, Iraj AU - Ahmadi, Mohammad AD - Department of Chemistry, Catalysis Division, University of Isfahan, Isfahan, Iran Y1 - 2016 PY - 2016 VL - 1 IS - 2 SP - 237 EP - 248 KW - Heck reaction KW - Hyperbranched polymers KW - Magnetic nanoparticles KW - Palladium nanoparticles KW - Sonogashira coupling reaction KW - Suzuki–Miyaura cross-couplings reaction DO - 10.7508/ncr.2016.02.011 N2 - This study offers an exclusive class of magnetic nanoparticles supported hyperbranched polyglycerol (MNP/HPG) that was functionalized with citric acid (MNP/HPG-CA) as a host immobilization of palladium nanoparticles. The MNP/HPG-CA/Pd catalyst was fully characterized using some different techniques such as thermogravimetric analysis (TGA), x-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive x-ray spectroscopy (EDX), inductively coupled plasma (ICP) and x-ray photoelectron spectroscopy (XPS). The new catalytic system showed high activity for the Suzuki–Miyaura cross-coupling and Heck reaction under mild and green conditions. Besides, the MNP/HPG-CA/Pd was found to be a convenient catalyst for copper-free Sonogashira coupling reaction in water as a green solvent at room temperature. Moreover, the catalyst could be recovered easily and reused several times without significant loss of reactivity. Ease of preparation, oxygen insensitive, phosphine-free, air- and moisture-stable, and high reusability of this immobilized palladium catalyst are the noteworthy advantages of this catalytic system. UR - http://www.nanochemres.org/article_39394.html L1 - http://www.nanochemres.org/article_39394_46ee8e3a53660eb56d392c489e97ae2f.pdf ER -