title: A renewable amine for photochemical reduction of CO(2).
abstract: Photochemical reduction of CO₂ (to produce formic acid) can be seen both as a method to produce a transportable hydrogen-based fuel and also to reduce levels of CO₂ in the atmosphere. However, an often overlooked necessity for photochemical CO₂ reduction is the need for a sacrificial electron donor, usually a tertiary amine. Here, we describe a new strategy for coupling the photochemical reduction of CO₂ to photochemical water splitting, and illustrate this with a prototype example. Instead of seeking to eliminate the use of an external reducing agent altogether, our alternative strategy makes the reducing agent recyclable. This has two potential advantages over the direct coupling of CO₂ reduction and water oxidation. First, it allows the two redox reactions to be carried out with existing chemistry, and second, it permits these reactions to be conducted under mutually incompatible conditions.
authors: Physical Organic Chemistry Centre, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, UK.
authors: Robert D
authors: RD
authors: Richardson
authors: Edward J
authors: EJ
authors: Holland
authors: Barry K
authors: BK
authors: Carpenter
mesh_terms: D000475:Alkenes / Q000737:chemistry; D000588:Amines / Q000138:chemical synthesis / Q000737:chemistry*; D002245:Carbon Dioxide / Q000737:chemistry*; D002384:Catalysis; D005557:Formaldehyde / Q000138:chemical synthesis / Q000737:chemistry; D006859:Hydrogen / Q000737:chemistry; D015394:Molecular Structure; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry; D055668:Photochemical Processes; D012997:Solvents / Q000737:chemistry; D013816:Thermodynamics; D014867:Water / Q000737:chemistry
chemical_list: D000475:Alkenes; D000588:Amines; D012997:Solvents; D014867:Water; D002245:Carbon Dioxide; D005557:Formaldehyde; D006859:Hydrogen; D010100:Oxygen