Sudip MohapatraThanawat ChaiprasertRapheepraew SodkhomkhumRungthip KunthomSasikarn HanprasitPreeyanuch SangtrirutnugulVuthichai ErvithayasupornMahidol University2018-12-112019-03-142018-12-112019-03-142016-01-01ChemistrySelect. Vol.1, No.16 (2016), 5353-5357236565492-s2.0-85017415789https://repository.li.mahidol.ac.th/handle/20.500.14594/43395© 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim We describe a novel and green synthetic methodology for the fabrication of polyhedral oligomeric silsesquioxane-supported N-heterocyclic carbenes/imidazolium salts on palladium(II) complexes; Pd(II)-MPIm-POSS (1) composite by solid-state annealing between Pd(OAc)2 and octakis(3-(1-methylimidazolium)propyl) octasilsesquioxane without added base. Subsequently, arylboronic acid based in situ or ex situ reduction of 1 in aqueous ethanol produces polyhedral oligomeric silsesquioxane-supported N-heterocyclic carbenes/imidazolium salts on palladium nanoparticles; Pd(0)-nano-POSS (2) composite, consisting of monodispersed and N-heterocyclic carbene (NHC) stabilized Pd nanoparticles of very small size (3.0 ± 1.5 nm). Nanocatalyst 2 is a highly efficient and easily recyclable homogeneous catalyst for Suzuki-Miyaura cross-coupling reactions with TOF up to 1670 h−1.Mahidol UniversityChemistryArticleSCOPUS10.1002/slct.201600878