Strong electron affinity PDI supramolecules form anion radicals for the degradation of organic pollutants via direct electrophilic attack
| Autor: | Tianqi Jia, Xiaojuan Bai, Haiyan Li, Junqi Li, Boxuan Sun, Di Li, Shengqi Yang, Xuyu Wang, Cong Wang |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Catalysis Science & Technology. 11:1899-1913 |
| ISSN: | 2044-4761 2044-4753 |
| Popis: | Pharmaceutical and personal care products (PPCPs) are the most common hazardous environmental pollutants. Accordingly, PDI anion radicals are promising photocatalysts to transform PPCPs into non-toxic CO2 and H2O for their clean and efficient production. In the present work, we successfully synthesized an electrophilic PDI supramolecular (sEACA-PDI) compound with high electron affinity through a simple gelation process. Its electron affinity is contributed by its side chain, which enhances the electrophilicity of its perylene core edge. Consequently, sEACA-PDI tends to form anion radicals to provide a SOMO orbital, which allows sEACA-PDI to obtain electrons successively from organic pollutants. Its side chain also generates a polarized surface electric field, building an efficient pathway for electron transfer. The high flexibility and freedom of the sEACA-PDI side chain is beneficial to form a cluster structure. Numerous strongly electrophilic groups are exposed on the surface of sEACA-PDI, which further enhance its electron affinity. sEACA-PDI exhibited high photocatalytic degradation efficiency for classical organic pollutants via successive electrophilic attack, i.e. the k for DCF was 0.923 h−1. Also, sEACA-PDI achieved a k value of 0.351 h−1 for the degradation of MB. This work proposes a promising strategy for developing PDI anion radicals with high electron affinity, and also provides new insights for the treatment of environmental pollutants. |
| Databáze: | OpenAIRE |
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