Au Nanoparticles Supported by Porous Aromatic Frameworks—Efficient and Recyclable Catalysts for Nitro Reduction

A strategy has been developed for the preparation of gold nanoparticles (Au NPs) supported by porous aromatic frameworks (Au@PAF-184, Au@PAF-185) with high Au NPs loading, good stability and excellent activity. This approach contains two steps: first step is ion exchange between cationic NaAuCl4, fixing AuCl4− electrostatic interaction anions cations; second reduction NaBH4. Au@PAF-184 Au@PAF-185 were successfully prepared accordingly. In comparison previously similar types materials such as Au@PAF-93 (2.86 wt% loading) Au@PAF-94 (4.69 coordination reduction, etc., loading (24.2 (34.9 increased about 8 times. When employed catalysts nitrobenzene both exhibited catalytic activity reusability.