کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5210560 | 1382901 | 2011 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Active immobilized palladium catalyst based on multiporous amphiphilic graft copolymer Active immobilized palladium catalyst based on multiporous amphiphilic graft copolymer](/preview/png/5210560.png)
Poly(vinylidene fluoride)-g-poly(dimethylaminoethyl methacrylate) (PVDF-g-PDMAEMA)/camphor system produces thermoreversible gel and leaching of camphor with cyclohexane yields amphiphilic multiporous material characterized from scanning electron microscopy (SEM), mercury intrusion porosimetry (MIP) and nitrogen adsorption porosimetry. Pd nanoparticles (Pd NPs, dia. 2.5-4.5Â nm) are grown on this porous material by adsorption of Pd(OAc)2 followed by reduction with hydrazine. MIP and nitrogen porosimetry show that the xerogels are multiporous in nature and the pore size decreases in the Pd NPs captured sample. The BET surface area of the Pd NPs captured dried gel (24.3Â m2Â gâ1) is lower than that of pure gel (32.5Â m2Â gâ1) due to the blocking of some pores by Pd NPs. The Pd NPs captured amphiphilic porous PVDF-g-PDMAEMA act as an effective catalyst for aerobic ligand free Suzuki coupling of aryl halides (XÂ =Â I, Br and Cl) in aqueous medium.
Journal: Reactive and Functional Polymers - Volume 71, Issue 10, October 2011, Pages 1045-1054