EurekAlert May 8, 2020
In the light-harvesting complexes of bacteria or plants, light is converted into energy, which is then transported to the reaction centre with minimal losses. To improve the energy transport efficiency an international team of researchers (Germany, the Netherlands) show how the excited-state energy landscape and thus the coherence characteristics of electronic excitations can be modified by the hierarchical level of H-type supramolecular architectures. They visualize, at room temperature, long-range incoherent transport of delocalized singlet excitons on pico- to nanosecond time scales in single supramolecular nanofibers and bundles of nanofibers. Increasing the degree of coherence enhances exciton diffusivities up to 1 order of magnitude. They found that single supramolecular nanofibers exhibit the highest diffusivities reported for H-aggregates so far…read more. Open Access TECHNICAL ARTICLEÂ
Abstract. Credit: J. Am. Chem. Soc. 2020, 142, 18, 8323-8330, April 11, 2020