Preparation of Palladium-Supported Periodic Mesoporous Organosilicas and their Use as Catalysts in the Suzuki Cross-Coupling Reaction

Materials

Jorge A. Corral¹  Mar໚ I. López¹  Dolores Esquivel¹  Manuel Mora¹  César Jiménez-Sanchidrián¹ 

[1] Department of Organic Chemistry, Nanochemistry and Fine Chemistry Research Institute (IUIQFN), Faculty of Sciences, University of Córdoba, Campus de Rabanales, Marie Curie Building, Ctra. Nnal. IV, km 396, Córdoba 14071, Spain; E-Mails:

关键词: periodic mesoporous organosilica;    palladium nanoparticles;    hydrogen chemisorption;    temperature programmed reduction;    Pd-supported catalysts;    Suzuki cross-coupling;   

DOI  :  10.3390/ma6041554

来源: mdpi

【 摘 要 】

Three periodic mesoporous materials, i.e., two organosilicas with either ethylene or phenylene bridges and one silica, have been used as supports for Pd nanoparticles. All Pd-supported samples (1.0 wt%) were prepared by the incipient wetness method and subsequently reduced in an H₂ stream at 200 °C. Both hydrogen chemisorption and temperature programmed reduction experiments revealed significant differences depending on the support. Pd²⁺ species were more reducible on the mesoporous organosilicas than on their silica counterpart. Also, remarkable differences on the particle morphology were observed by transmission electron microscopy. All Pd-supported samples were active in the Suzuki cross-coupling reaction between bromobenzene and phenylboronic acid.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.