title: Water-stabilized three- and four-atom palladium clusters as highly active catalytic species in ligand-free C-C cross-coupling reactions.
abstract: Elite cliques: Palladium clusters with three and four atoms were found to be the catalytically active species for ligand-free palladium-catalyzed CC bond-forming reactions. These palladium cluster species could be stabilized in water and stored for long periods of time for use on demand with no loss of activity. High yields of products and turnover frequencies (TOFs) of up to 10(5)  h(-1) were observed.
authors.affiliation: Instituto de Tecnología Química, Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas, Avda. de los Naranjos s/n, 46022 Valencia (Spain).
authors.forename: Antonio
authors.initials: A
authors.lastname: Leyva-Pérez
authors.forename: Judit
authors.initials: J
authors.lastname: Oliver-Meseguer
authors.forename: Paula
authors.initials: P
authors.lastname: Rubio-Marqués
authors.forename: Avelino
authors.initials: A
authors.lastname: Corma
keywords: clusters; cross-coupling reactions; homogeneous catalysis; ligand-free conditions; palladium