Microwave-assisted synthesis of ultrafine Au nanoparticles immobilized on MOF-199 in high loading as efficient catalysts for a three-component coupling reaction

作     者：Yan Jiang Xin Zhang Xiaoping Dai Wen Zhang Qiang Sheng Hongying Zhuo Yun Xiao Hai Wang 

作者机构：State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 China National Institute of Metrology Beijing 100013 China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2017年第10卷第3期

页      面：876-889页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：The authors acknowledge the financial support from the National Natural Science Foundation of China (Nos. 21573286  21173269  and 21572688)  Ministry ofScience and Technology of China (Nos. 2011BAK15B05 and 2015AA034603)  Specialized Research Fund for the Doctoral Program of Higher Education (No. 20130007110003)  and Science Foundation of China University of Petroleum  Beijing (No. 2462015YQ0304) 

主　　题：MOF-199 ultrafine Au nanoparticles(NPs) high loading microwave irradiation AS-coupling 

摘      要：Controlled integration of ultrafine metal nanoparticles （MNPs） and metal- organic frameworks （MOFs） has drawn much attention due to their unique physical and chemical properties. However, the development of a one-step strategy for preparing ultrafine MNPs within MOFs still remains a great challenge. Herein, a facile synthetic approach toward the abovementioned composites was developed. In contrast to the conventional approach, these hybrids were prepared by the direct mixing of metal and MOF precursors in the reaction solution assisted by microwave irradiation. Impressively, the Au/MOF-199 composite with uniformly distributed ultrafine Au nanoparticles could be fabricated in only two minutes, and the Au loading could be increased up to a level of 5.13%. The multifunctional Au/MOF-199 catalysts exhibited high turnover numbers （TONs） and turnover frequencies （TOFs） in the three-component coupling reaction of formaldehyde, phenylacetylene, and piperidine （AB-coupling）. Owing to the confinement effect of MOF-199, the 5.13%Au/MOF-199 catalyst could be recycled for five runs without serious loss of activity, with no obvious aggregation of Au NPs detected.