Project Area A
Project Area A develops the molecular components used in CataLight for light-absorption, charge-separation and catalytic turnover, and develop concepts to enable their soft matter integration. Specifically, the following materials classes are targeted:
• Molecular Photosensitizers: metal complexes and organic chromophores
• Molecular catalysts: metal complexes and metal chalcogenide clusters
Benjamin Dietzek, Sven Rau
Strategies for Molecular Repair and Self-regulation in Light-driven Catalysis for Hydrogen Evolution
A1 will step beyond the current design concepts for molecular photocatalysts; based on a thorough understanding of the photocatalytic mechanism, we want to improve the overall catalytic activity by developing active repair strategies that recycle of the catalyst and by creating self-regulating supramolecular light-harvesting complexes, which funnel excitation energy to the photocatalyst.
Peter Bäuerle, Wolfgang Weigand
Noble Metal-free Photosensitizer-Catalyst Hybrids for Photocatalytic Hydrogen Generation under Visible Light
A2 aims at the synthesis, characterization, and application of a series of molecular, noble metal-free, and highly catalytically active water reduction catalysts for the photo- and photoelectrocatalytic hydrogen evolution reaction under visible light. The overall goal of the project is the development of unique hybrid photosensitizer-catalyst dyads, where the visible light absorbing organic photosensitizer the catalytically active hydrogenase mimic are strongly covalently coupled.
Rylene Dyes as Photosensitizers and Antenna Systems
A3 focuses on the design and preparation of novel metal-free chromophores to explore their application as antenna systems and sensitizers in molecular light-driven catalysis. The project will exploit strategies for covalent incorporation in catalyst-sensitizer dyad molecules as well as the integration into soft matter matrixes. Towards this aim, we will prepare functional rylene chromophores including naphthalene and perylene mono- and diimides, push-pull rylene dyes and water-soluble perylene dyes decorated with pH responsive groups.
Sven Rau, Carsten Streb
Covalently Linked Photosensitizer-Catalyst Dyads for One-step Materials Integration
A4 will develop covalent photosensitizer-catalyst dyads as electronically coupled molecular devices, where each component can be designed and optimized independently. These systems will enable the efficient coupling of molecular metal-complex light absorbers to molecular molecular metal oxides as hydrogen evolution or water oxidation catalysts. This could lead to advanced PS-CATs, which overcome detrimental effects such as photodegradation, electrostatic aggregation and colloid formation.
Timo Jacob, Carsten Streb
Experimental and Theoretical Studies on Molecular Molybdenum Sulfide Hydrogen Evolution Reaction Catalysts
A5 will perform correlated experimental and theoretical studies on molecular molybdenum sulfides to link structural and electronic features with their light-driven hydrogen evolution activity, thereby rationalizing the connection between structure and reactivity. Modification of the chemical structure will be used to target optimized, more stable catalysts where reactivity can be increased and deactivation can be inhibited. The heterogenization of these model catalysts on solid light-absorbers will be explored.