Corrole is a tetrapyrrolic ring-contracted porphyrin analog with one direct pyrrole-pyrrole link. The corrole macrocycle is electron-rich and easily stabilized in its one electron oxidized radical state, especially when coordinated to some specific metal ions. The corrole radicals and their complexes have demonstrated excellent air stability, amphoteric redox properties, and diversified spin configurations. Herein, we summarize the recent developments in the synthesis and properties of various corrole radicals, including $\pi$-monoradicals, antiferromagnetically and ferromagnetically coupled metal radicals, and $\pi$-diradicals. The regulation of spin, redox, and optical properties of corrole radicals by modifications to their periphery substituents, coordinated metals, and axial ligands is highlighted, which demonstrates their promising application prospects in spintronics, electronics, and energy-conversion materials.

Corrole 是一种四吡咯环收缩卟啉类似物，具有一个直接的吡咯-吡咯连接。咔咯大环富含电子，很容易稳定在其单电子氧化自由基状态，尤其是与某些特定金属离子配位时。咔咯自由基及其配合物表现出优异的空气稳定性、两性氧化还原性能和多样化的自旋构型。在此，我们总结了各种咔咯自由基的合成和性质的最新进展，包括$\pi$-单自由基、反铁磁和铁磁耦合金属自由基，以及$\pi$-双自由基。重点介绍了通过修饰周围取代基、配位金属和轴向配体来调节咯咯自由基的自旋、氧化还原和光学性质，这表明了它们在自旋电子学、电子学和能量转换材料中的广阔应用前景。