Potassium poly(heptazine imide), a carbon nitride based semiconductor with high structural order and a valence band potential of +2.2 V vs. NHE, in the presence of hole scavengers and under visible light irradiation gives the corresponding polymeric radical anion, in which the specific density of unpaired electrons reaches 112 μmol g⁻¹. The obtained polymeric radical anion is stable under anaerobic conditions for several hours. It was characterized using UV-vis absorption, time resolved and steady state photoluminescence spectra. The electronic structure of the polymeric radical anion was confirmed by DFT cluster modelling. The unique properties of potassium poly(heptazine imide) for storing charges were employed in visible light photocatalysis. A series of substituted dibenzyldisulfanes was synthesized in 41–67% yield from the corresponding methylarenes via cleavage of the methyl C–H bond under visible light irradiation and metal-free conditions.

中文翻译：

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“等待”的氮化碳自由基阴离子：一种电荷存储材料和甲基芳烃直接 C-H 硫醇化的关键中间体，使用元素硫作为“S”源†

聚庚嗪酰亚胺钾是一种氮化碳基半导体，具有高结构有序性，价带电位为 +2.2 V vs. NHE，在空穴清除剂存在和可见光照射下产生相应的聚合物自由基阴离子，其中未配对电子的比密度达到 112 μmol g ^-1. 所得聚合自由基阴离子在厌氧条件下可稳定数小时。使用紫外可见吸收、时间分辨和稳态光致发光光谱对其进行表征。聚合物自由基阴离子的电子结构通过 DFT 簇建模得到证实。聚（庚嗪酰亚胺）钾用于存储电荷的独特性质被用于可见光光催化。通过在可见光照射和无金属条件下裂解甲基 C-H 键，从相应的甲基芳烃中合成了一系列取代的二苄基二硫烷，产率为 41-67% 。