The Suzuki coupling reaction catalysed by a self-assembled monolayer of palladium(II) ferrocenylimine complex (Pd (FcL)-Si) was studied in detail. The precatalyst hybrid was used for the in situ reduction of the catalytically active Pd 0 to investigate the catalysis reaction using water-drop contact angle, atomic force microscopy, Raman spectroscopy, cyclic voltammetry and X-ray photoelectron spectroscopy. The first reaction step on the substrate, i.e., the oxidative addition of aryl halide to Pd 0 (FcL)-Si, was established. In addition, evidence of catalyst restoration to its initial state after catalytic reaction was obtained. These results suggested that surface sites on Pd (FcL)-Si were crucial to the catalysis of the coupling reaction. A Pd 0 /Pd II redox interplay on the surface was also clearly detected. We believe that this catalytic reaction process can overcome the issues of low catalytic activity and reusability to provide a highly active and reusable heterogeneous catalytic system.

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A simple, recyclable, and self-assembled Pd(ii)–alkyl Schiff base complex for Suzuki coupling reaction: chain length dependence and heterogeneous catalysis.

In this article, an approach to generate self-assembly cyclopalladated polythiophene imine monolayers (denoted as ITO@Pd-CPTIMs) is described. The monolayers were fabricated by combining self-assembly (SA), hybrid doping (HD), and electrochemical polymerization (ECP) called SA-HD-ECP. The catalytic activity and stability of the polymerized monolayers in the Suzuki coupling reaction were improved by modulating the structure and morphology in hybrid doping using different thiophene derivatives, concentrations, and scanning numbers during electrochemical polymerization. Morphological changes in the catalytic surface associated with catalytic activity were investigated. ITO@Pd-PTF could improve catalytic activity with a higher TON value (45000 mol/molcat) and attain recycling ability at least 10 times.