Efficient Synthesis of Xanthenediones Using CuCeO2 Nanoparticle Catalyst in Aqueous Medium.

In all cases, the three-component reaction produced excellent yields (mean yield 96%). The reaction yield increased with an increase in catalyst amount from 2 mol% to 10 mol%, but catalyst loading beyond 10 mol % showed no improvement in the reaction yield. CeO SB 2 sb nanoparticles (NPs) have received a great deal of attention in recent years due to their numerous applications in a variety of fields such as catalysis,[1] ceramics,[2] fuel cells,[3] gas sensors,[4],[5] solid-state electrolytes,[6] ceramic biomaterials,[7] chemical-mechanical polishing (CMP),[8] and ultraviolet absorbtion.[9] The CeO SB 2 sb nanomaterial is an excellent catalyst due to its oxygen storage and release capacity (OSC) via the redox shift between Ce SP 4+ sp and Ce SP 3+ sp under oxidizing and reducing conditions.[10],[11] Different morphologies of CeO SB 2 sb nanomaterials for catalytic activity have been investigated.[1],[11] Numerous nanostructures of CeO SB 2 sb have been prepared and used as catalysts, including nanoparticles, nanotubes, nanowires, nanorods, nanocubes, and nanospindles. To evaluate the effect of temperature on the reaction yield, the model reaction was conducted at different temperatures with an optimized catalyst loading. [Extracted from the article]