"In this project it is wanted to synthesize a new family of homobimetallic complexes with designed characteristics for the activation and conversion of CO2. The principles derived from these studies will be applied to electrocatalysis or photocatalysis, for the reduction of CO2 to biocombustibles like MeOH, HCHO or OHCOCOOH, with high values for the activity, turn over number (TON), and rate of the reaction (turn over frequency, TOF) as well as the lifetime of the catalyst. Why is this goal proposed? Because recently, there has been considerable focus on the rapid increased concentration of greenhouse gases in the atmosphere, and in particular CO2 is of major concern. This rise in greenhouse gas concentrations has been linked to the warming of the global climate observed since the mid-20th century, and is projected to result in extensive environmental damage. The Intergovernmental Panel on Climate Change (IPCC) in its fourth assessment report, published in 2007, suggested that the observed warming is “very likely” due to greenhouse gas emissions from anthropogenic sources, particularly the burning of fossil fuels. This concern, coupled with the projected need for independent and renewable energy sources, has focused considerable attention on the potential use of solar energy for the production of chemical fuels. A particularly attractive scheme would involve the use of solar energy to produce an electrical current, which would then be employed for the reduction of CO2 to provide carbon-neutral energy sources as alternatives to fossil fuels. Thus, the main two targets of this project are important issues in the modern society: global warming and the need of new sources of energy."