Département de chimie moléculaire

A transition-metal (M)-based cathode for reducing incident carbon dioxide into formate in a water-org. or purely aq. medium and applicable to treatment of air being supplied to industrial processes, systems for atm. pollution control and for regeneration of respirable air in a confined or unconfined environment comprises a mol. transition metal complex or I: -the group A1 functionalizing a base mol. unit in a bidentate ligand and being identical or different electron attracting groups so that the ligand makes it possible to reduce the redn. redox potential of the complex in a range of -1.40 to +0.80 V with ref. to an Ag/Ag+ ref. electrode, at least one of the groups A or A1 being electropolymerizable, -groups Y and Y1 being identical or different, stereochem. trans, labile groups from the following: halide (Cl-, Br-, I-) anion, acetate (CH3COO-) anion and neutral mol. acetonitrile, DMF or DMSO mols., - and groups Z and Z1 being identical or different, stereochem. cis-, stabilizing ligands providing, a donor and attractor group if the carbonyl type or phosphine type of formula PR3 with R being alkyl, aryl or pyridine, - the complex having been modified into a polymer film in an electrochem. procedure in which metal-metal bonds are formed. [on SciFinder(R)]