Pd NPs supported on halloysite functionalized with Schiff base as an efficient catalyst for Sonogashira reaction

Abstract A hybrid system was designed and synthesized through reacting modified halloysite (Hal-Cl) with Schiff base (DAB-PC) applied as catalytic support for anchoring Pd NPs to afford Pd@Hal-DAB-PC catalyst. The resultant material well identified by various analyses including Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction patterns (XRD), thermogravimetric analysis (TGA), field-emission scanning electron microscopy (FE-SEM), energy-dispersive (EDS), transmission (TEM), inductively coupled plasma-optical emission spectrometry (ICP-OES) revealed outstanding activity in the Sonogashira reaction aqueous media. Also, This nanocatalyst simply collected recycled up six runs a slight drop efficiency, indicating durability of Pd@Hal-DAB-PC.