1 Nanoporous Ionic Organic Networks: Stabilizing and Supporting 2 Gold Nanoparticles for Catalysis

ABSTRACT: Nanoporous ionic organic networks (PIONs) with a high ionic density 9 (three cation−anion pairs per unit) have been synthesized by a facile S N 2 nucleophilic 10 substitution reaction. Owing to the electrostatic and steric effect, those ionic networks 11 with porous channels can stabilize and support gold (Au) nanoparticles (NPs) in 1−2 12 nm. The Au@PION hybrid materials used as an heterogeneous catalyst were highly 13 active, selective, and stable in the aerobic oxidation of saturated alcohols. 14 KEYWORDS: Gold nanoparticles, gold catalysis, porous polyelectrolyte, porous poly(ionic liquid)s, aerobic oxidation 15 D uring the past decade, the possibility of modulating the 16 physicochemical properties of ionic liquids (ILs) by an 17 appropriate combination of cations and anions allied to their 18 supramolecular organization enables the ILs-mediated prepara- 19 tion of metallic nanoparticles (NPs). 1−5 Meanwhile, gold (Au) 20 NPs with increased fractions of edges and corners have been