Cu nanoparticles immobilized on modified magnetic zeolite for the synthesis of 1,2,3‐triazoles under ultrasonic conditions

Abstract

Magnetically recoverable copper nanoparticle‐loaded natural zeolite -CuNPs/<br>MZN- as an efficient catalyst was synthesized. The Fe3O4 magnetic nanoparticles<br>were immobilized into the pores of natural clinoptilolite zeolite, which<br>were modified with epichlorohydrine and ethylenediamine species and then<br>CuNPs were decorated on the surface of functionalized zeolite -CuNPs/<br>MZN-. The catalysts were successfully characterized by Fourier<br>transform‐infrared, CHN, thermogravimetric analysis, inductively coupled<br>plasma, X‐ray diffraction, scanning electron microscopy and transmission electron<br>microscopy techniques. The 1,2,3‐triazoles were readily synthesized<br>through using the catalyst in high yields and short reaction times under ultrasonic<br>conditions via CuAAC reactions of aryl azides and terminal alkynes. The<br>CuNPs/MZN was easily separated from the reaction mixture by an external<br>magnet and reused several times successfully. The catalyst could be used for<br>the synthesis of various organic compounds.