CIESC Journal ›› 2015, Vol. 66 ›› Issue (5): 1738-1747.DOI: 10.11949/j.issn.0438-1157.20141894

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Supported Au/MOF-5: a highly active catalyst for three-component coupling reactions

LIU Lili, TAI Xishi, LIU Meifang, LI Yufeng, FENG Yimin, SUN Xiaori   

  1. School of Chemistry and Chemical Engineering and Environmental Engineering, Weifang University, Weifang 261061, Shandong, China
  • Received:2014-12-22 Revised:2015-02-04 Online:2015-05-05 Published:2015-05-05
  • Supported by:
    supported by the National Natural Science Foundation of China (21171132), the Promotive Research Fund for Young and Middle-aged Scientists of Shandong Province (2014BSB01061), and the Technology Research and Development Program of Weifang (201301035).

Au/MOF-5催化剂在三组分偶联反应中的催化性能

刘丽丽, 台夕市, 刘美芳, 李玉峰, 冯一民, 孙晓日   

  1. 潍坊学院化学化工与环境工程学院, 山东 潍坊 261061
  • 通讯作者: 刘丽丽
  • 基金资助:
    国家自然科学基金项目(21171132);山东省优秀中青年科学家科研奖励基金项目(2014BSB01061);潍坊市科学技术发展计划项目(201301035)。

Abstract: Gold was supported on a functionalized MOF-5 by impregnation method. The catalyst Au/MOF-5 was characterized by powder X-ray diffraction (XRD), N2 adsorption-desorption, infrared spectra (IR), thermogravimetric analysis and differential thermal analyses (TG-DTA), transmission electro microscopy (TEM), and inductivity coupled plasma (ICP). Its catalytic performance was examined in one-pot synthesis of structurally divergent propargylamines via three component coupling of aldehyde, alkyne, and amine (A3) in 1,4-dioxane. The results showed that the Au/MOF-5 catalyst displayed high activity (high aldehyde consumption rate and turn-over number at 120℃: 18.7 mmol·(g Au)-1·h-1 and 14.7, based on total gold content) and 100% selectivity for propargylamines. Various aromatic and aliphatic aldehydes were also able to undergo the A3 coupling on the catalyst Au/MOF-5. It was also found that the conversion of benzaldehyde was higher on the catalyst for aryl aldehydes with electron-withdrawing group bonded on benzene ring than for those with an electron-donating group. There was good conversion of benzaldehyde for secondary amines and N-alkyl aniline such as piperidine, pyrrolidine, morpholine, diethylamine, and N-methylaniline. It was also found that the conversion of benzaldehyde decreased with increasing chain length of straight-chain alkyl substituted phenylacetylene. Au/MOF-5 catalyst could be recycled at least three times, and the activity only decreased slightly.

Key words: complexes, catalyst, chemical reaction, reactivity

摘要: 采用浸渍法制备了Au/MOF-5催化剂,用X射线衍射(XRD)、N2物理吸附、红外光谱(IR)、热重分析(TG-DTA)、电感耦合等离子体原子发射光谱(ICP-AES)和透射电镜(TEM)对催化剂进行表征,并探索其在醛、炔和胺三组分(A3)偶联反应中的催化性能。实验结果表明:Au/MOF-5对醛、炔和胺三组分偶联反应具有较好的催化活性,而且对产物炔丙基胺的选择性为100%。Au/MOF-5对反应底物具有较宽的适用范围,对于芳香醛和脂肪醛、二级胺和N-烷基取代苯胺、芳香炔和脂肪炔均具有较好的催化活性,而且对于吸电子芳香醛的催化活性大于供电子芳香醛。Au/MOF-5可以循环使用至少3次,催化活性变化不大。

关键词: 配合物, 催化剂, 化学反应, 活性

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