Unusual 6,7-bis-nitrated N-annulated perylene diimides are reported which have stabilized frontier molecular orbitals making them highly electron deficient. Radical anion formation under ambient conditions is readily feasible. A crowded NO₂ substitution pattern significantly alters the perylene core geometry. Varied functionalization at the pyrrolic N-position allows for crystal engineering.

中文翻译：

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非常规6,7-双硝化N-环化per二酰亚胺的合成，自组装和空气稳定的自由基阴离子

据报道，不寻常的6,7-双硝化N-环化的per二酰亚胺具有稳定的前沿分子轨道，使其高度缺乏电子。在环境条件下形成自由基阴离子是容易可行的。拥挤的NO ₂取代模式会显着改变the核的几何形状。在吡咯N-位的各种官能化允许进行晶体工程。