4.5 Article

Novel aminophosphonate ligand for the preparation of catalytically active silica aerogels with finely dispersed palladium

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JOURNAL OF POROUS MATERIALS
卷 30, 期 2, 页码 449-457

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SPRINGER
DOI: 10.1007/s10934-022-01357-4

关键词

Aerogels; Silica; Immobilization; Ligands; Palladium; Catalysis

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Silica-based aerogels with a novel aminophosphonate-containing substituent were prepared and formed chelated complexes with Pd2+ and Cu2+ ions. The Pd-containing aerogel exhibited excellent catalytic activity and could be reduced to metallic Pd under different treatment conditions.
Silica-based aerogels bearing a novel aminophosphonate-containing substituent were prepared. Pd2+ and Cu2+ ions were introduced into aerogel matrix to form chelated complexes with aminophosphonate moiety. Both complexes securely retain Me2+ after supercritical drying (SCD) in CO2. In silica matrix, Pd complex is reduced to metallic Pd after treatment by gaseous H-2 at 120 degrees C. In lyogel matrix, Pd complex can also be reduced to metallic Pd upon SCD in isopropanol. Pd-containing aerogel showed excellent catalytic activity in the reaction of C=C and C=Cbonds hydrogenation.

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