文献类型：期刊文献

英文题名：Phenyl@Rh(I)-Bridged Periodic Mesoporous Organometalsilica with High Catalytic Efficiency in Water-Medium Organic Reactions

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

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

年份：2009

卷号：21

期号：20

起止页码：4925

外文期刊名：CHEMISTRY OF MATERIALS

收录：;EI(收录号：20094412413982);WOS:【SCI-EXPANDED(收录号:WOS:000270807800026)】；

基金：This work was supported by the National Natural Science Foundation of China (20825724), Chinese Education Committee (20070270001), and Shanghai Government (S30406, 07dz22303).

语种：英文

外文关键词：Catalyst activity - Efficiency - Mesoporous materials - Rhodium compounds - Addition reactions - Organic acids - Solutions

摘要：A facile approach to prepare phenyl and, Rh(I) organometal bridged periodic-mesoporous organometalsilica was developed based on surfactant-directed co-condensation of RhCl[PPh2-(CH2)(2)Si(OEt3)(3)](3) and (OEt)(3)SiPhSi(OEt)(3). The as-prepared Rh(I)-Pfh(2)-PMO(Ph) exhibited matchable catalytic efficiency with the corresponding Rh(PPh3)(3)Cl homogeneous catalyst in water-medium reaction between phenylboronic acid and butyl acrylate or the 1,4-conjugate addition reaction between phenylboronic acid and N,N-dimehytlacyrlmaide, which could be attributed to the high dispersion of Rh(I) active sites, the ordered mesoporous channels and the strong surface hydrophobicity resulting from phenyl fragments embedded in silica walls, leading to the facilitated the diffusion and the adsorption of organic molecules onto the catalyst in aqueous solution. The Rh(I)-PPh2-PMO(Ph) could be used repetitively, showing the excellent durability that could be attributed to the effective inhibition of Rh(I) leaching and the high hydrothermal stability of the mesoporous structure.