Supported C60-IL-PdNPs as extremely active nanocatalysts for C–C cross-coupling reactions. Issue 43 (24th October 2016)

• Record Type: Journal Article
• Authors: Giacalone, Francesco; Campisciano, Vincenzo; Calabrese, Carla; La Parola, Valeria; Liotta, Leonarda F.; Aprile, Carmela; Gruttadauria, Michelangelo
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 43(2016)
• Page Start: 17193
• Page End: 17206
• Publication Date: 2016-10-24
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6ta07599a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Novel hybrid materials based on Pd-nanoparticles immobilized onto different silica functionalized C60 -IL conjugates showed the highest TOF in Suzuki couplings. Abstract : A C60 -ionic liquid hybrid has been covalently linked to three different solid supports, namely amorphous silica, SBA-15 and Fe2 O3 @SiO2, and the resulting materials have been employed as covalently supported ionic liquid phases (cSILP) in order to immobilize and stabilize palladium nanoparticles (PdNPs). These novel hybrid materials are based on a sort of "matryoshka" system (PdNPs@imidazolium-salt@C60 @support) in which the imidazolium-based moieties have not been directly linked to the surface of the support, but they are present in an octopus-like spatial arrangement on the uniformly surface-distributed fullerenes. These materials have been fully characterized and successfully employed as catalysts in C–C bond forming reactions showing, in the case of Suzuki cross-coupling, an outstanding catalytic activity both under classical heating and by irradiating with microwaves. Turn-over frequencies (TOFs) of up to 3 640 000 h −1 have been achieved and the silica-based catalyst showed full recyclability even after 10 cycles.