Polyquinoline-supported ruthenium catalysts: selective oxidation of alcohols with coated electrodes

Fullerene Polypyridine Ligands: Synthesis, Ruthenium Complexes, and Electrochemical and Photophysical Properties

“…Electrochemistry of [Ru(tpy)(tpy‐C 60 )][PF 6 ] 2 (8) : The cyclic voltammetric behaviour of complex 8 was measured in 1,2‐dichlorobenzene/CH 3 CN (4:1). The E 1/2 values of ligand 3 , complex 8 , and reference compounds [Ru(tpy) 2 ][PF 6 ] 2 13 and [Ru(tpy)(tpy‐NH 2 )][PF 6 ] 2 13 are summarized in Table 1. From the CV response of complex 8 , one oxidation and four reduction processes were recorded.…”

Catalytic Applications of Terpyridines and their Transition Metal Complexes

“…To facilitate the separation and catalyst recycling, the catalytically active complexes have been immobilized onto electrodes by a polymer coating, either by means of incorporation into a polymer matrix131–133 or covalent binding to a polymer 134–141. The former approach, for example, utilizing graphite electrodes coated with Nafion, as host for [(tpy)(bpy)Ru(H 2 O)] 2+ , gave promising results in terms of activity in the oxidation of benzaldehyde, but the catalyst was deactivated after approximately 150 turnovers 132.…”

Electrocatalytic oxidation of alcohols by a [Ru(tpy)(phen)(OH2)]2+-modified electrode

“…Thus, the nature of the ligand may influence the selectivity of the reaction, despite of the small steric [32] and electronic differences between phenanthroline and bipyridine. Second, it has been reported that the oxidation of aldehydes to carboxylic acids is inhibited when [Ru(tpy)(bpy)(OH 2 )] 2+ is immobilized onto the electrode by a polymer film [17,19,20,24]. Moreover, with the covalently grafted catalyst, previous kinetic investigations of the oxidation of benzyl alcohol seemed to show that benzaldehyde is oxidized into benzoic acid directly on the carbon electrode [27].…”

“…The catalyst has been incorporated into a polymer matrix [14][15][16] or covalently attached to a polymer [17][18][19][20][21][22][23][24]. The film-modified electrodes can act as selective oxidants since the oxidation of benzyl alcohol gave benzaldehyde without overoxidation to benzoic acid [17,19,20,24].…”