A Pentacene-based Nanotube Displaying Enriched Electrochemical and Photochemical Activities
Research output: Contribution to journal › Article › Scientific › peer-review
|Journal||Angewandte Chemie - International Edition|
|Early online date||2018|
|Publication status||Published - Jan 2019|
|Publication type||A1 Journal article-refereed|
Unlike previously well-studied, acyclic pentacene oligomers, the first synthesis of a cyclic pentacene trimer with a fixed tubular conformation is reported. A short-step synthesis starting from common pentacenequinone yielded the target molecule with a 1.5 nanometer length and a subnanometer pore. Steady-state spectroscopic analyses revealed that the close proximity of the non-conjugated, three pentacene chromophores allows the nanotube to display stepwise electrochemical/chemical oxidation characteristics. Furthermore, time-resolved transient absorption measurements elucidated the generation of an excited triplet state of the nanotube, with high quantum yield reaching about 180 % through intramolecular singlet fission and a very long triplet lifetime.