Tuesday, 31 May 2022: 10:40
West Meeting Room 202 (Vancouver Convention Center)
Functional materials comprised of spontaneously self-assembled electron donor and acceptor entities capable of generating long-lived charge-separated states upon photo-illumination are in great demand as they are key in building the next generation of light energy harvesting devices. However, creating such well-defined architectures is challenging due to the intricate molecular design, multi-step synthesis, and issues associated in demonstrating long-lived electron transfer.
Here, we have newly synthesized, by tether-directed functionalization, a [60]fullerene e-bisadduct carrying two Zn-porphyrins (Figure), and demonstrate supramolecular organization and photophysical events. Remarkably, the supramolecular assembly of the present bisporphyrin-C60 forms donut-shape aggregates, primarily via π-π type charge transfer interactions. Upon photoexcitation, the supramolecular assembly generates long-lived charge-separated states of »1−40 μs lifetime due to electron/hole delocalization within the supramolecular structure
Reference
- Caballero, M. Barrejón, J. Cerdá, J. Aragó, S. Seetharaman, P. de la Cruz, E. Ortí, F. D’Souza, F. Langa. J. Am. Chem. Soc. 2021, 143, 11199.