New Platforms for Stable Carbon‐Centered Radicals

Organic radicals can play important roles potentially in diverse functional materials owing to an unpaired electron but are usually highly reactive and difficult to use. Therefore, stabilization of organic radicals is crucially important. Among organic radicals, carbon‐centered radicals are promising because of their trivalent nature that enables structural diversity and elaborate designs but they show less stabilities because of reactivities toward carbon‐carbon bond formation and atmospheric oxygen. Recently, stable carbon‐centered radicals have been increasingly explored on the basis of diverse molecular platforms. This minireview highlights these newly explored stable carbon‐centered radicals with a particular focus on porphyrinoid‐stabilized radicals owing to their remarkable spin delocalization abilities.

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