γ‐Fe2O3 nanoparticles were formed inside the cage‐like pores of mesocellularfoam (MCF). These magnetic nanoparticles showed a uniform size distribution that could be easily controlled by the MCF pore size, as well as by the hydrocarbon chain length used for MCF surface modification. Throughout the entrapment process, the pore structure and surface area of the MCF remained intact. The resulting magnetic
[EN] PHOSPHONIUM SALTS DERIVATIVES AND THEIR USE AS SOLUBILITY CONTROLLING AUXILIARIES<br/>[FR] DERIVES DE SELS DE PHOSPHONIUM, UTILISATION DE CES DERNIERS EN TANT QU'ADJUVANTS DE REGULATION DE LA SOLUBILITE
申请人:VALORISATION RECH SOC EN COMMA
公开号:WO2005097812A1
公开(公告)日:2005-10-20
The present invention relates to the use of compounds of formula (IA) or (IIA): insert formula (IA) and (IIA) from page 15 of the disclosure wherein A represents various substituted or unsubstituted groups such as furyl, phenyl, pyridyl, naphthyl, or thiophenyl; X- represents an anion; and L1 represents a linker, as solubility controlling auxiliaries. These compounds can also be used as solubility controlling fragments of a molecule. The invention also relates to various methods of controlling the solubility of a molecule or a substrate. Moreover, the invention also relates to various phosphonium supported reagents or various phosphonium salts derivatives.
Magnetic Nanoparticle Supported Second Generation Hoveyda-Grubbs Catalyst for Metathesis of Unsaturated Fatty Acid Esters
作者:Zhu Yinghuai、Loo Kuijin、Ng Huimin、Li Chuanzhao、Ludger Paul Stubbs、Chia Fu Siong、Tan Muihua、Ship Chee Peng
DOI:10.1002/adsc.200900370
日期:2009.11
The Hoveyda–Grubbs catalyst has been successfully immobilized on surface-modified magnetic nanoparticles with a loading amount of 0.28 mmol ruthenium/g (magnetic support). The supported catalysts were active for the self-metathesis of methyl oleate and macro-monomer in a quantitative conversion, respectively. In addition, the catalyst can be easily separated by using a magnet and reused several times
Mesocellular Foam-Supported Catalysts: Enhanced Activity and Recyclability for Ring-Closing Metathesis
作者:Jaehong Lim、Su Seong Lee、Siti Nurhanna Riduan、Jackie Y. Ying
DOI:10.1002/adsc.200600442
日期:2007.5.7
siliceous mesocellular foam (MCF). The open and interconnected pores of MCF facilitated ligand immobilization and substrate diffusion. We have observed that the ligand and metal loadings significantly affected the catalytic activity and recyclability. Enhancedrecyclability by suppression of ruthenium leaching was achieved by using excess immobilized ligands. The resulting novel heterogenized catalysts demonstrated
Hybrid Organic-Inorganic Materials Derived from a Monosilylated Hoveyda-type Ligand as Recyclable Diene and Enyne Metathesis Catalysts
作者:Xavier Elias、Roser Pleixats、Michel Wong Chi Man、Joël J. E. Moreau
DOI:10.1002/adsc.200600627
日期:2007.7.2
Hoveyda-type monomer is described as well as the preparation of several organic-inorganic hybrid materials derived from it by sol-gel processes and by anchoring to commercial silica gel and MCM-41. The resulting materials were treated with first and/or second generation Grubbs’ catalyst to generate Hoveyda–Grubbs’ type alkylidene ruthenium complexes covalently bonded to the silica matrix. These materials