文献类型：期刊文献

英文题名：Palladium nanoparticles stabilized by chitosan/PAAS nanofibers: A highly stable catalyst for Heck reaction

作者：Du, Yijun[1];Wei, Sailong[1];Tang, Minchao[1];Ye, Miaoting[1];Tao, Hongyu[1];Qi, Chenze[1];Shao, Linjun[1]

机构：[1]Shaoxing Univ, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing 312000, Zhejiang, Peoples R China

年份：2020

卷号：34

期号：5

外文期刊名：APPLIED ORGANOMETALLIC CHEMISTRY

收录：SCI-EXPANDED(收录号：WOS:000517641600001)、、EI(收录号：20201208307206)、Scopus(收录号：2-s2.0-85081598487)、WOS

基金：National Natural Science Foundation of China, Grant/Award Numbers: 11705117, 11905132

语种：英文

外文关键词：chitosan nanofiber; electrospinning; free volume; heck reaction; palladium nanoparticles

外文摘要：Palladium chloride doped chitosan composite nanofibers were prepared by electrospinning with sodium polyacrylate (PAAS) as the co-spinning agent. The composite nanofibers are subsequently treated at elevated temperature to improve their solvent resistance. The Pd (II) cations inside the composite nanofibers were reduced into uniform palladium nanoparticles (Pd NPs) with mean diameter of similar to 4.93 nm. These Pd NPs inside the chitosan composite nanofibers exhibited excellent catalytic activity for Heck reactions of aromatic iodides with alkenes with yields over 85%. Moreover, due to the fibrous structure, this novel fibrous palladium catalyst could be readily recovered by simple filtration and reused for 18 times without loss of initial catalytic activity. It was found that the reactants could readily diffuse from the reaction solution to the active Pd NPs inside the nanofibers and the products could departure from composite fibers into the reaction solution, while the Pd NPs were tightly restricted inside the chitosan composite nanofibers.