PREPARATION OF Pd NPs ONTO SOLID SUPPORT FOR HYDROGENATION REACTIONS AND PRODUCTION OF FINE CHEMICALS

Nanoparticles (NPs) research is currently an area of intense scientific interest due to a wide variety of potential applications. NPs exist with great chemical and morphological diversity and can be generated via different synthetic routes. The target of our work is the "green synthesis" of NPs supported onto ion exchange resins. The Dowex Ion Exchange Resin is an inexpensive and commercially available product that offers a broad number of varieties (micro-, macroporous, different % cross-linking agent or ionic form). The NPs have been synthesized starting from a Pd precursor where Pd(II) is immobilized onto resin and then reduced by H2 or NaBH4. To test the activity and verify the recycling of these catalysts, hydrogenation reactions were performed using substrates such as olefines, alpha-ketoesters or alkynes. The results, determinated by GC, showed high catalytic efficiency under mild conditions, effective recycling, and negligible catalyst leaching. The characterization of the NPs via TEM, XRD, ICP, ESEM proves that NP's dimension depends on the reduction method.