Novel Pd-BTP/SiO2 as an Effective Heterogeneous Catalyst for Heck Reactions
Novel Pd-BTP/SiO2 as an Effective Heterogeneous Catalyst for Heck Reactions
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DOI：
10.1080/00986445.2015.1039119
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发表时间：
2016-02
影响因子：
2.5
通讯作者：
Zuojun Wei;D. Thushara;Yingxin Liu;A. Zhang;S. Deng
中科院分区：
文献类型：
--
作者：
Zuojun Wei;D. Thushara;Yingxin Liu;A. Zhang;S. Deng
以2，6-二（5，6-二甲基-1，2，4-三嗪-3-基）吡啶[BTP]修饰的介孔二氧化硅（Pd-BTP/SiO2）为载体，负载钯（II），制备了一种高效、可重复使用的催化剂--功能化二氧化硅负载钯（II）配合物。采用透射电子显微镜（TEM）、X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、X射线光电子能谱（XPS）、热重分析（TGA）和比表面积（BET）等方法对催化剂进行了表征。用该催化剂催化卤代芳烃与丙烯酸或苯乙烯的Heck偶联反应，得到了较好的结果（转化率87-96%，收率66-78%）。该催化剂体系在反应条件下稳定，可重复使用5次以上而催化活性无损失。
A highly efficient and reusable catalyst, palladium (II) complex supported on functionalized silica, was prepared by anchoring palladium (II) onto 2,6-bis(5,6-dimethyl-1,2,4-triazine-3-yl)pyridine [BTP]-modified mesoporous silica (labeled as Pd-BTP/SiO2). The catalyst was characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), and Brunauer Emmett Teller (BET) analysis. Its catalytic performance was tested for the Heck coupling reactions between aryl halides with acrylic acid or styrene, and good to excellent results (higher conversions 87–96% and yields 66–78%) were obtained. The catalyst system was stable under the reaction conditions and could be successfully reused more than five times without the loss of catalytic activity.