Stable meso-Fluorenyl Smaragdyrin Monoradical.
Hemanta KalitaTullimilli Y GopalakrishnaJishan WuPublished in: Organic letters (2018)
The facile synthesis and physical characterization of a meso-fluorenyl smaragdyrin monoradical 4, which is stable due to efficient spin delocalization and kinetic blocking, is reported. It has a small energy gap and can be oxidized and reduced into the respective cation and anion, showing different charge distribution and electronic absorption properties.