文献类型：期刊文献

英文题名：Palladium nanoparticles encapsulated in polyimide nanofibers: An efficient and recyclable catalyst for coupling reaction

作者：Du, Yijun[1];Gou, Faliang[1];Gao, Danning[1];Liu, Zhifeng[1];Shao, Linjun[1];Qi, Chenze[1]

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

年份：2021

卷号：35

期号：12

外文期刊名：APPLIED ORGANOMETALLIC CHEMISTRY

收录：SCI-EXPANDED(收录号：WOS:000695195300001)、、EI(收录号：20213710892846)、Scopus(收录号：2-s2.0-85114711734)、WOS

基金：We are thankful for the financial support from the National Natural Science Foundation of China (Grant Number: 11905132, 11975157, and 12075154).

语种：英文

外文关键词：coupling reaction; electrospinning; nanofiber; palladium; polyimide

外文摘要：In this study, palladium-encapsulated poly(amic acid) (Pd@PAA) nanofibers were prepared by electrospinning, followed by thermal imidization to synthesize palladium-encapsulated polyimide (Pd@PI) nanofibers. Scanning electron microscopy (SEM) images confirmed the preparation of uniform and smooth Pd@PAA and Pd@PI nanofibers. Thermogravimetric analysis (TGA) results reveal that the Pd@PI nanofibers possessed excellent thermal stability. The dispersion of palladium nanoparticles in the polyimide nanofibers was characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). The catalysis results show that this Pd@PI fibrous catalyst was very efficient to catalyze the cross-coupling reactions of aromatic iodides with n-butyl acrylate (Heck reaction) or phenylboronic acid derivatives (Suzuki reaction) to afford the desired products in good to excellent yields. Moreover, the Pd@PI catalyst could be easily separated and recovered from the reaction mixture by simple filtration due to the regular fibrous structure and reused for 10 times for both Heck and Suzuki reactions without obvious loss of its initial catalytic activity. Thus, the Pd@PI nanofiber catalyst holds great potential in chemical industry in terms of its excellent catalytic activity and stability.