Image (IMAGE) Ehime University Caption Synthesis of antiaromatic expanded azacoronene via intramolecular Vilsmeier-type reaction which shows aromaticity switching upon redox stimuli Credit Figure Adapted with Permission from Journal of the American Chemical Society 2019, 141. © 2019 American Chemical Society. Usage Restrictions Please get copyright permission License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.