From Stable Radicals to Thermally Robust High-Spin Diradicals and Triradicals

Stable radicals and thermally robust high-spin di- and triradicals have emerged as important organic materials due to their promising applications in diverse fields. New fundamental properties, such as SOMO/HOMO inversion of orbital energies, are explored for the design of new stable radicals, including highly luminescent ones with good photostability. A relation with the singlet–triplet energy gap in the corresponding diradicals is proposed. Thermally robust high-spin di- and triradicals, with energy gaps that are comparable to or greater than a thermal energy at room temperature, are more challenging to synthesize but more rewarding. We summarize a number of high-spin di- and triradicals, based on nitronyl…

• NI
  National Institute of General Medical Sciences

  Award: R01GM124310-01
• NI
  National Institute of Biomedical Imaging and Bioengineering

  Award: R01EB019950-01A1
• DO
  Division of Chemistry

  Awards: CHE-1955349, CHE-2247170, CHE-1665256