New oligonuclear metal catalysts for the light-driven activation of water and the reduction of CO2

The interaction of light and matter has an important role in the enlivened nature. Following the structural characteristics of active centres in biological systems new molecular compounds shall be synthesised that, with the aid of light activation, will control or even only allow catalytic reactions like the water oxidation or the CO2 reduction. Transition metals of the first row (e.g. Mn, Fe and Co) will be responsible for the catalytic activity and will be connected to photoactive units.
The water oxidation shall be achieved with oligonuclear complexes which have a ligand framework that is structurally similar to known Pacman-compounds. They will be assembled using different functionalized units, e.g. porphyrin derivatives, that are attached to a suitable backbone. Hence, two or more metal centres can be placed with a well-directed distance to each other.
Systems with a planar bridging ligand shall be used for the carbon dioxide reduction, that have light collecting units (ruthenium complex moieties) connected to the periphery and a catalytic active metal in the centre. After light excitation a photo electron transfer is anticipated to occur and, hence, transfers electrons to the catalytic active centre allowing the reduction of coordinated CO2. Thus, the bridging ligand should additionally have electron storage capacity.

Principal Investigators
Schwalbe, Matthias Dr. (Details) (Inorganic and General Chemistry I)

Duration of Project
Start date: 06/2010
End date: 06/2014

Research Areas
Inorganic Molecular Chemistry - Synthesis and Characterisation

Last updated on 2020-03-12 at 16:35