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Synthesis, Characterisation of Polymer-Supported Palladium-2-Methylimidazole Complex Catalyst for the Hydrogenation of Aromatic Nitro Compounds

“…PSPdMeimz-actv did not show any significant changes in the XPS results (Spectrum B). 21,30 Similar observations are reported by Mathew and Mahadevan 24 and Mani et al 31 The XPS spectrum of the recycled catalyst (Spectrum C) revealed that, palladium continues to be in the +2 oxidation state even after recycling the catalyst for six times although the broadening of the peaks observed in spectrum C could be due to the presence of palladium in zero oxidation state formed during usage.…”

Supported Cobalt Nanoparticles for Hydroformylation Reactions

“…It is well known in the literature that heterogeneous metal catalysts are leaching under typical conditions of hydroformylation. In those cases, the active species—usually a metal carbonyl—is formed in situ . Considering that the reaction solutions were normally coloured after stopping the reaction, we presumed that this colour originated from leached cobalt carbonyl species.…”

Hydrogenation of nitrobenzene over Pd/C catalysts prepared from molecular carbonyl–phosphine palladium clusters

“…By using functions that are already present on the support, or by grafting first suitable ligands on its surface, organometallic complexes could react selectively with these groups, leading to a uniform and controlled distribution of active species on the support [2,3]. This strategy has been applied to active carbon as support by building suitable surface functions [4][5][6][7][8][9][10]. The presence of carboxylate groups in particular on the carbon surface allowed the incorporation of functions playing the role of ligands for organometallic complexes by derivatization.…”