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Chin. J. Org. Chem. ›› 2011, Vol. 31 ›› Issue (11): 1835-1841. Previous Articles     Next Articles

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(聚酰胺-胺)-水杨醛席夫碱树枝状大分子钯配合物的合成、表征及催化性能

宋子维1，祝晶晶1，陈新2，刘蒲1*   

  1. (1郑州大学化学系 郑州 450001)
    (2复旦大学聚合物分子工程教育部重点实验室 上海 200433)
  • 收稿日期:2011-02-25 修回日期:2011-05-16 发布日期:2011-06-15
  • 通讯作者: 刘蒲 E-mail:liupu@zzu.edu.cn

Synthesis, Characterization and Catalytic Performance of PAMAM- Salicylidene Schiff Base Dendrimer Palladium Complex

Song Ziwei1 Zhu Jingjing1 Chen Xin2 Liu Pu*1   

  1. (1 Department of Chemistry, Zhengzhou University, Zhengzhou 450001)
    (2 Key Laboratory of Molecular Engineering of Polymers, Ministry of Educa-tion, Fudan University, Shanghai 200433)
  • Received:2011-02-25 Revised:2011-05-16 Published:2011-06-15

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First, 1.0G～5.0G polyamidoamine dendrimers (PAMAM) were synthesized by divergent approach. Then the PAMAM were modified with salicylaldehyde by the dehydration condensation reaction of amino and aldehyde, and the Schiff base ligands (PAMAMSA) were prepared successfully. Finally, a series of PAMAMSA palladium complexes were synthesized by the reaction of Schiff base with Li2PdCl4 in methanol. The structures and components of PAMAMSA-Pd were confirmed by the characterization of FT-IR, elemental analysis and TG-DSC. Using PAMAMSA-Pd as cata-lyst precursor, the catalytic performances were evaluated in the Heck cross-coupling of iodobenzene (or its derivatives) with acrylic acid in neat water medium. The dendrimer catalyst showed higher activity compar-ing to PdCl2. The 1.0G PAMAMSA-Pd and 5.0G PAMAMSA-Pd were found to have the higher activity in the Heck reaction.

Key words: dendrimer, Schiff base, palladium complex, Heck cross coupling reaction