Ionic liquid modified carbon nanotube supported palladium nanoparticles for efficient Sonogashira-Hagihara reaction

A Palladium supported onto an ionic liquid-modified carbon nanotube is prepared. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), thermogravimetric analysis (TGA), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) are used to complete its characterization. The application as catalyst in the copper-free Sonogashira-Hagihara coupling is also studied employing different substrates. This heterogeneous catalyst is successfully recycled for 5 consecutive identical reactions maintaining its efficiency. After this fifth catalytic run the catalyst is characterized again.The authors are grateful to Institute for Advanced Studies in Basic Sciences (IASBS) Research Council and the University of Alicante. We also thankful for financial support to the Iran National Science Foundation (INSF-Grant number of 4003055), We gratefully acknowledge financial support from the Spanish Ministerio de Ciencia, Innovación y Universidades (RED2018–102387-T) the Spanish Ministerio de Economía, Industria y Competitividad, Agencia Estatal de Investigación (AEI) and Fondo Europeo de Desarrollo Regional (FEDER, EU) (projects CTQ2017–82935-P and PID2019–107268GB-I00), the Generalitat Valenciana (IDIFEDER/2021/013), and the University of Alicante