文献类型：期刊文献

英文题名：Pyridine Functionalized Polystyrene Supported Cobalt Superfine Fibers as an Efficient and Recyclable Catalyst for Heck Reactions

作者：Zhang, Xi[1];Shi, Zhengjun[2];Xu, Pengfei[2];Zhang, Qi[1];Huang, Xudong[1];Xing, Guiying[3];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;[2]Zhejiang Zhongxin Fluoride Mat Co Ltd, Shaoxing 312000, Zhejiang, Peoples R China;[3]Shaoxing Univ, Sch Med, Shaoxing 312000, Zhejiang, Peoples R China

年份：2024

卷号：25

期号：3

起止页码：797

外文期刊名：FIBERS AND POLYMERS

收录：SCI-EXPANDED(收录号：WOS:001162210800001)、、EI(收录号：20240715565788)、Scopus(收录号：2-s2.0-85185124724)、WOS

基金：The authors acknowledge the financial support from the National Natural Science Foundation of China (No. 11905132 and 11975157).

语种：英文

外文关键词：Pyridine functionalized polystyrene; Supported cobalt catalyst; Superfine fiber; Heck reaction

外文摘要：Supported cobalt catalysts have attracted more and more attention for their easy separation and recyclability. Herein, cobalt-embedded pyridine functionalized polystyrene superfine fibers were readily fabricated by electrospinning. Then, the pyridine functionalized polystyrene and polystyrene molecules inside the fibers were cross-linked by paraldehyde to improve the fiber stability. The synthesis of pyridine functionalized polystyrene and cross-linking of polystyrene molecules inside the fibers were confirmed by FT-IR spectra. The fiber morphologies were characterized by SEM. The dispersion of cobalt species was analyzed by SEM-EDS, XRD and TEM. Finally, the Heck reactions were employed to evaluate the catalytic performance of this novel fibrous catalyst. The catalysis results show that this novel fiber catalyst exhibited excellent catalytic activity for the Heck reactions of aromatic iodides with alkenes to afford coupling products with yields over 80%. Moreover, due to the embedment of cobalt species and chelation of pyridine groups, this novel fiber catalyst can be reused five times with little loss of catalytic activity. In all, we have developed a highly active and stable supported cobalt catalyst, which holds great potential for green chemical processes.