Abstract
Pt-(diphenylamino styryl benzylazanediyl) diacetic acid derivatives nanocomposites were synthesized via the alcohol reduction method and used as catalysts for hydrogenation of benzaldehydes including benzaldehyde, 3-phenoxybenzaldehyde, 4-hydroxybenzaldehyde, 4-anisaldehyde, and 4-dimethylaminobenzaldehyde. The nanocomposites characterized by UV-Vis, XRD and TEM have mean sizes of platinum cores from 1.8 to 2.9 nm. The size depends on the molar ratio of platinum and the organic compound in the nanocomposites. The Pt nanocomposites are stable not only in the colloidal solution but also during the catalytic hydrogenation process. The results of the catalytic hydrogenation of benzaldehyde derivatives demonstrate that the catalytic activity of the nanocomposites is much higher than that of Pt nanoparticles stabilized by Frechet-type dendrimers under the same reaction conditions. High activity of the catalysts may be attributed to the relatively open dendritic shell of the nanocomposite, which provides large tunnels for the substrates moving from the surface to the active sites.
Published Version
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