Recently, using C-O electrophiles as alternative to aryl halides in cross-coupling reactions has attracted extensive attention.&lt;span style="font-size:10.8333px"&gt; &lt;/span&gt;Replace aryl halides with ethers could reduce emission of the halogenated waste, besides, ethers are the simplest derivatives of phenol and some of them can be extracted from the depolymerization products of lignin, cost of ethers is much lower than aryl halides. However, the activation energy for C-OMe bond-cleavage is relatively high due to the reluctance of the C-OMe bond towards oxidative addition and the lower propensity of the methoxy residue to act as a leaving group. To active the inert C-O bond, homogenous nickel complexs were extensively used as the catalyst,&lt;span style="font-size:10.8333px"&gt; &lt;/span&gt;develop a catalyst with higher catalytic efficiency and excellent recyclability is main issues in this field.<br/>Nanoparticle is regarded as an ideal catalytic material due to it’s high specific surface area, and it is recognized as the bridge between the homogeneous and heterogeneous catalyst. Bimetallic nanoparticles (BMNPs), composed of two different metal elements, usually show a combination of the properties associated with monometallic counterparts and a significant enhancement due to synergistic effects. Besides, the properties of the BMNPs could be easily adjusted according to the requirements of specific reactions, those outstanding properties endow BMNPs great potential in the catalysis field. Herein, a UiO-66 supported Pd-Ni BMNPs was fabricated, the catalyst show excellent catalytic performance in the C-O bond activation reaction of 2-methoxynaphthalene. Corresponding mono metallic Pd or Ni nanoparticles can't catalyze this reaction, the yield was up to 68% in the absence of ligand while full conversion was achieved when PCy<sub>3 </sub>was introduced. The reaction was proceed under a mild reaction condition, the catalyst show excellent stability during the reaction process, no significant loss in catalytic efficiency was observed after 4 cycles.

C-O bond activation catalyzed by UiO-66 supported Pd-Ni bimetallic nanoparticles

255th National Meeting (2018)

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