The rhodium complex of bis(diphenylphosphinomethyl)dopamine-coated magnetic nanoparticles as an efficient and reusable catalyst for hydroformylation of olefins

Abstract

Magnetic nanoparticles(MNP) functionalized by a new bis(diphenylphosphinomethyl)dopamine(bpd) of type MNP@bpd were prepared, characterized and their reusability as catalysts were assessed by hydroformylation reaction.A new bis(diphenylphosphinomethyl) dopamine (bpd) ligand has been prepared and anchored on the surface of magnetic nanoparticles (MNPs). The obtained ligand and the surface functionalized nanoparticles of type MNP@bpd have been characterized by various analytical techniques, such as NMR, IR, TEM, XRD, and VSM. TEM shows homogeneous distribution of the particles with the size ranging 5-7 nm. XRD Rietveld analysis confirm the formation of pure and single Fe 3 O 4 phase with high crystallinity. The ligands anchoring on the magnetic nanoparticles surface have been confirmed by the shift of the characteristic Fe-O vibration band in the FT-IR spectrum, and has been supported by the stepwise weight loss in TGA as a function of temperature. The phosphorus content determined by ICP-MS is approximately 0.39 mmol of phosphine per gram of the nanoparticles. Magnetization-field curves recorded at room temperature reveal superparamagnetic behavior. The materials MNP@bpd have proven to be an excellent catalyst after in-situ addition of rhodium (Rh) metal precursor for the hydroformylation reaction of styrene and its derivatives. The extent of reusability of the catalyst has been tested and was found to be active even after seven consecutive cycles.

Pd nanoparticles on green support as dip-catalyst: a facile transfer hydrogenation of olefins and N-heteroarenes in water

“…41 Encouraged by such distinctive features of having highly improved activity and excellent recyclability over the conventional support-based catalysts, we continue to contribute to the development of highly recyclable heterogeneous catalysts. 29,[42][43][44] Here, we report a "dip-catalyst" comprising Pd nanoparticles supported on bio-processed jute stem (Pd@GS), for the transfer hydrogenation of olens, quinoline and other N-heteroarenes in water (Fig. 1).…”

PdNPs@ZIF-8 Micro-Nanostructured Catalyst of Regioselective Mizoriki-Heck Olefination

“…In our effort to develop promising catalysts for industrial applications, we recently reported magnetic‐nanoparticle‐supported catalysts of the C−C bond formation reaction. Although excellent yields were achieved for the series of olefinic substrates tested, it was difficult to carry out the multistep synthesis of the phosphinated ligands present on the support system ,. In the current paper, we report the growth of Pd nanoparticles on the robust ZIF‐8 in the presence of formic acid as a mild reducing agent and report its catalytic application to the Mizoriki‐Heck C−C bond formation reaction.…”

Platinum Nanoparticle Based Dip‐Catalyst for Facile Hydrogenation of Quinoline, Unfunctionalized Olefins, and Imines

“…[29] Furthermore, increasing restrictions imposed by governments and the United Nations protocols with the aim of eliminating toxic chemical processes require adopting safer procedures. In this context, researchers have studied systems with metals, such as Mn, [30] Ni, [31][32][33] Ru, [34,35] Co, [36][37][38] Rh, [39][40][41] Ir, [42][43][44][45] Pd, [46,47] and Pt [48] immobilized on zeolite, [49,50] silica, [50,51] polymers, [52][53][54] alumina, [55] magnetite, [39,[56][57][58][59] and carbon. [60] These systems exhibit moderate to excellent conversion and selectivity, especially in the hydrogenation reactions.…”