文献类型：期刊文献

英文题名：Ethyl-bridged Periodic Mesoporous Organosilica Supported Pd(II) Organometallic Catalyst for Water-medium Barbier Reaction

作者：Yang Xushi[1];Huang Jianlin[2];Zhu Fengxia[2];Li Hexing[1,2]

机构：[1]E China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]Shanghai Normal Univ, Dept Chem, Shanghai 200234, Peoples R China

年份：2010

卷号：68

期号：3

起止页码：217

外文期刊名：ACTA CHIMICA SINICA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000275345400003)】；

语种：英文

外文关键词：periodic mesoporous organosilica; Pd(PPh3)(2)Cl-2; immobilized homogeneous catalyst; Barbier reaction; water-medium clean organic reaction

摘要：Ordered mesoporous organornetallic catalyst Pd(II)-PPh2-PMO(Et) was synthesized by coordinating the Pd(II) with PPh2-ligand originally incorporated into the ethyl-bridged periodic mesoporous organosilica via surfactant-directed co-condensation. This catalyst exhibited matchable activity with the corresponding PdCl2(PPh3)(2) homogeneous catalyst in water-medium Barbier reaction. On one hand, it Could be attributed to the large surface area and ordered mesporous channels of the PMO support, leading to the high dispersion of Pd(II) active sites and the reduced diffusion limit. Meanwhile, the ethyl fragments embedded in the pore walls could enhance surface hydrophobdity, which further promoted the diffusion and adsorption of organic molecules, leading to the enhanced activity. Besides, the Pd(II)-PPh2-PMO(Et) could be used repetitively, showing a good potential in industrial applications.