Recyclable hollow Pd-Fe nanospheric catalyst for Sonogashira-, Heck-, and Ullmann-type coupling reactions of aryl halide in aqueous media

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:349

Article

Li, Hui^1,2  Zhu, Zhonghong^1,2  Li, Hexing^1,2  Li, Ping³  Zhou, Xinggui³ 

[1] Shanghai Normal Univ, Dept Chem, Shanghai 200234, Peoples R China

[2] Shanghai Normal Univ, Educ Minist, Key Lab Resource Chem, Shanghai 200234, Peoples R China

[3] E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

关键词: Pd-Fe;    Hollow nanospheres;    Vesicle template;    Coupling reaction;    Green chemistry;   

DOI  :  10.1016/j.jcis.2010.06.009

来源: Elsevier

【 摘 要 】

Hollow Pd-Fe nanospheres were fabricated through a vesicle-assisted chemical reduction method. With the characterization of X-ray diffraction, selected area electron diffraction, X-ray photoelectron spectroscopy, scanning electron micrography, transmission electron micrography, and N-2 physisorption experiment, the resulting Pd-Fe material was identified to be hollow spherical with mesoporous shell. During aqueous Sonogashira-, Heck-, and Ullmann-type coupling reactions of aryl halide, the as-prepared hollow Pd-Fe nanospheres exhibited much higher activity than the dense counterpart nanoparticles. The enhanced reactivity was attributed to both the hollow chamber structure and the promotional effect of Fe-dopants, which provided more Pd active sites for the reactants. Moreover, this hollow material displayed other advantages such as low-cost, recyclability and easy experimental handling. (C) 2010 Elsevier Inc. All rights reserved.

【 授权许可】

Free