ni-guanidine@mcm-41 nps: a new catalyst for the synthesis of 4,4ʹ-(arylmethylene)-bis-(3-methyl-1-phenyl-1h-pyrazol-5-ols) and symmetric di-aryl sulfides

In this work, the surface of mesoporous mcm-41 was modified with guanidine, and then, nickel particles have become immobilized on its surface (ni-guanidine@mcm-41nps). this heterogeneous catalyst has been identified by various techniques including: low-angle x-ray diffraction, scanning electron microscopy, energy-dispersive x-ray spectroscopy, inductively coupled plasma, thermal gravimetric analysis and n2 adsorption–desorption measurement isotherms, and its catalytic application was studied in the synthesis of 4,4ʹ-(arylmethylene)-bis-(3-methyl-1-phenyl-1h-pyrazol-5-ol) derivatives and symmetric di-aryl sulfides. the prepared organometallic complex could be isolated, post-reaction, by simple filtration for several consecutive cycles without a notable change in its catalytic activity.