N-maleyl chitosan-supported palladium catalyst for Heck coupling reaction and reduction of 4-nitrophenol
文献类型： 外文期刊
作者： Luo, Wenyi 1 ; Luo, Kun 1 ; Yang, Yi 1 ; Lin, XianJia 1 ; Li, Puwang 2 ; Wen, Yanmei 1 ;
作者机构： 1.Guangdong Ocean Univ, Dept Chem & Environm Sci, Zhanjiang 524088, Peoples R China
2.Chinese Acad Trop Agr Sci, Agr Prod Proc Res Inst, Zhanjiang 524001, Peoples R China
关键词： N-maleyl chitosan; Palladium; Heterogeneous catalyst; C-C coupling; Reduction of 4-nitrophenol
期刊名称：COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS （ 影响因子：5.518； 五年影响因子：4.746 ）
ISSN： 0927-7757
年卷期： 2022 年 652 卷
页码：
收录情况： SCI
摘要： In this study, maleic anhydride-acylated chitosan (MAAC) was synthesized by modifying chitosan with maleic anhydride, and used to support palladium catalysts. N-maleyl chitosan-supported palladium (Pd/MAAC) was used as a heterogeneous catalyst for the Heck coupling reaction and reduction of 4-nitrophenol (4-NP). The chemical structure of Pd/MAAC was characterized using FT-IR XPS, XRD, XPS, TEM, SEM/EDS, N-2-physisorption (adsorption-desorption), and ICP-MS. The as-synthesized catalyst exhibited high catalytic performance and could be reused up to nine runs to catalyze the cyclic reaction between iodobenzene and n-butyl acrylate with low leaching of palladium. Pd/MAAC was also used for the reduction of 4-NP to 4-aminophenol(4-AP) in 90 s at room temperature, and could be reused six times. The findings establish that Pd/MAAC catalyst is an efficient, economical, practical, and environment-friendly catalyst for the Heck reaction and reduction of 4-NP.
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