May 1, 1992Chemical Reviews
Photoinduced electron transfer in supramolecular systems for artificial photosynthesis
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Implication
Comprehensive review demonstrates principles of photoinduced electron transfer in supramolecular complexes, highlighting synthetic design strategies for solar energy conversion.
Key Points
- The review examines the fundamental principles and molecular architectures required to achieve efficient photoinduced charge separation and long-lived energy storage in synthetic supramolecular assemblies designed for artificial photosynthesis.
- Synthesized and evaluated multi-component donor-acceptor molecules modeling natural photosynthetic reaction centers.
- Analyzed the effects of thermodynamic driving force, reorganization energy, distance, and electronic coupling on electron-transfer kinetics using time-resolved spectroscopy.
- Surveyed structural geometries including covalently linked porphyrin-quinone arrays and supramolecular coordination networks.
- Multistep electron transfer in sequential donor-acceptor arrays significantly extends charge-separated lifetimes by slowing down charge recombination relative to forward transfer.
- Optimizing spacer rigidity and spatial orientation minimizes electronic coupling for recombination while maximizing initial forward transfer rates.
- Marcus inverted-region dynamics enable the stabilization of high-energy radical-ion pairs with quantum yields approaching unity in artificial photosynthetic centers.
Cite This Study
Michael R. Wasielewski (1992) studied this question.