| 张颜萍,贾美林.以类水滑石CuZnAl为前驱体制备的催化剂对C-N交叉偶联反应的性能研究[J].分子催化,2015,(4):315-322 |
| 以类水滑石CuZnAl为前驱体制备的催化剂对C-N交叉偶联反应的性能研究 |
| The Research of C-N Coupling over Catalysts Obtained from CuZnAl Hydrotalcite Precursors |
| 投稿时间：2015-05-27 修订日期：2015-07-29 |
| DOI： |
| 中文关键词: 类水滑石 催化剂 C-N交叉偶联 1-苯基咪唑 |
| 英文关键词:hydrotalcites catalysts C-N coupling 1-phenylimidazole |
| 基金项目:国家重点基础研究发展计划资助；内蒙古自治区高等学校科学研究重点项目 |
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| 中文摘要: |
| 以类水滑石CuZnAl为前驱体，经600℃焙烧制备了一系列不同Cu/Zn/Al摩尔比的催化剂。对催化剂进行了XRD、BET、H2-TPR及XPS等表征，并测定了该催化剂催化碘苯与咪唑C-N交叉偶联合成1-苯基咪唑的催化性能。结果表明，当Cu/Zn/Al摩尔比为2∶1∶1时，其活性组分Cu分散均匀且催化性能达到最佳，在130℃空气气氛中，KOH存在的条件下，反应24 h，1-苯基咪唑的产率可达到85.8 %，实现了C-N偶联反应在多相催化体系中进行，催化剂可回收不产生环境污染，经5次重复使用其催化性能下降不明显。 |
| 英文摘要: |
| A series of catalysts with various Cu/Zn/Al molar ratios were prepared by decomposition of CuZnAl hydrotalcite precursors at 600 ℃ for 3 h. The catalysts were characterized by X-ray diffraction (XRD), N2 adsorption-desorption (BET), H2 temperature-programmed reduction (H2-TPR) and X-ray photoelectron spectroscopy (XPS). The effect of the ratio of Cu/Zn/Al on the performance for C-N coupling reaction of imidazole with aryliodide was investigated. The results revealed that CuZnAl molar ratio of 2∶1∶1 was preferred for having good activity, we discovered that at the optimal condition, such as the reaction temperature of 130 ℃, 50 mg of copper catalysts and reaction time of 24 h, the product of 1-phenylimidazole was obtained in good to excellent yield by using KOH in DMSO solvent under air atmosphere. The catalyst can be recycled and used for five times without a decrease in catalystic performance. |
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