Ramin Ghorbani-Vaghei

Introduction Studies on the isolation, characterization and catalytic activities of functionalized carbon nanotubes (CNTs) have received particular attention during the last decade owing to their specific catalytic applications compared to homogeneous complexes. Metal nanoparticles as well as various transition metal complexes such as polymers and porphyrins were used for the functionalization of carbon nanotubes [1–5]. Schiff bases, which are an important class of ligands with extensive applications in different fields [6], also showed excellent catalytic activity when grafted on CNTs [7–10]. Wildgoose et al. reviewed the recent developments in this area by exploring the various techniques allowing one to functionalize the carbon nanotubes with metals and other nanoparticles, and the diverse applications of the resulting materials [11]. Howev- er, the applications of CNTs have been impeded by their poor solubility in solvents and polymers, which originated from strong van der Waals at